The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not "properly restrict the use of" the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405.

This collective update for the GNU C library (glibc) provides the following fixes and enhancements :

Security issues fixed :

  - Fix stack overflow in getaddrinfo with many results.
    (bnc#813121, CVE-2013-1914)

  - Fix a different stack overflow in getaddrinfo with many     results. (bnc#828637)

  - Fix array overflow in floating point parser [bnc#775690]     (CVE-2012-3480)

  - Fix strtod integer/buffer overflows [bnc#775690]     (CVE-2012-3480)

  - Add patches for fix overflows in vfprintf. [bnc #770891,     CVE-2012-3405, CVE-2012-3406]

  - Fix buffer overflow in glob. (bnc#691365)     (CVE-2010-4756)

  - Flush stream in addmntent, to catch errors like reached     file size limits. [bnc #676178, CVE-2011-1089]

Bugs fixed :

  - Fix locking in _IO_cleanup. (bnc#796982)

  - Fix resolver when first query fails, but seconds     succeeds. [bnc #767266]

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This collective update to the GNU Lib C library (glibc) provides the following fixes :

  - Make addmntent() return errors also for cached streams     (bnc#676178, CVE-2011-1089)

  - Fix overflows in vfprintf() (bnc#770891, CVE-2012-3406)

  - Fix incomplete results from nscd (bnc#753756)

  - Fix a deadlock in dlsym in case the symbol isn't found,     for multi-threaded programs (bnc #760216).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not 'properly restrict the use of' the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405.

Updated glibc packages fix security vulnerabilities :

Stephane Chazelas discovered that directory traversal issue in locale handling in glibc. glibc accepts relative paths with .. components in the LC_* and LANG variables. Together with typical OpenSSH configurations (with suitable AcceptEnv settings in sshd_config), this could conceivably be used to bypass ForceCommand restrictions (or restricted shells), assuming the attacker has sufficient level of access to a file system location on the host to create crafted locale definitions there (CVE-2014-0475).

David Reid, Glyph Lefkowitz, and Alex Gaynor discovered a bug where posix_spawn_file_actions_addopen fails to copy the path argument (glibc bz #17048) which can, in conjunction with many common memory management techniques from an application, lead to a use after free, or other vulnerabilities (CVE-2014-4043).

This update also fixes the following issues: x86: Disable x87 inline functions for SSE2 math (glibc bz #16510) malloc: Fix race in free() of fastbin chunk (glibc bz #15073)

Tavis Ormandy discovered a heap-based buffer overflow in the transliteration module loading code. As a result, an attacker who can supply a crafted destination character set argument to iconv-related character conversation functions could achieve arbitrary code execution.

This update removes support of loadable gconv transliteration modules.
Besides the security vulnerability, the module loading code had functionality defects which prevented it from working for the intended purpose (CVE-2014-5119).

Adhemerval Zanella Netto discovered out-of-bounds reads in additional code page decoding functions (IBM933, IBM935, IBM937, IBM939, IBM1364) that can be used to crash the systems, causing a denial of service conditions (CVE-2014-6040).

The function wordexp() fails to properly handle the WRDE_NOCMD flag when processing arithmetic inputs in the form of '$((... ))' where '...' can be anything valid. The backticks in the arithmetic epxression are evaluated by in a shell even if WRDE_NOCMD forbade command substitution. This allows an attacker to attempt to pass dangerous commands via constructs of the above form, and bypass the WRDE_NOCMD flag. This update fixes the issue (CVE-2014-7817).

The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not properly restrict the use of the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers (CVE-2012-3406).

The nss_dns implementation of getnetbyname could run into an infinite loop if the DNS response contained a PTR record of an unexpected format (CVE-2014-9402).

Also glibc lock elision (new feature in glibc 2.18) has been disabled as it can break glibc at runtime on newer Intel hardware (due to hardware bug)

Under certain conditions wscanf can allocate too little memory for the to-be-scanned arguments and overflow the allocated buffer (CVE-2015-1472).

The incorrect use of '__libc_use_alloca (newsize)' caused a different (and weaker) policy to be enforced which could allow a denial of service attack (CVE-2015-1473).

Several vulnerabilities have been fixed in eglibc, Debian's version of the GNU C library.

#553206 CVE-2015-1472 CVE-2015-1473

The scanf family of functions do not properly limit stack allocation, which allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code.

CVE-2012-3405

The printf family of functions do not properly calculate a buffer length, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service.

CVE-2012-3406

The printf family of functions do not properly limit stack allocation, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string.

CVE-2012-3480

Multiple integer overflows in the strtod, strtof, strtold, strtod_l, and other related functions allow local users to cause a denial of service (application crash) and possibly execute arbitrary code via a long string, which triggers a stack-based buffer overflow.

CVE-2012-4412

Integer overflow in the strcoll and wcscoll functions allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long string, which triggers a heap-based buffer overflow.

CVE-2012-4424

Stack-based buffer overflow in the strcoll and wcscoll functions allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long string that triggers a malloc failure and use of the alloca function.

CVE-2013-0242

Buffer overflow in the extend_buffers function in the regular expression matcher allows context-dependent attackers to cause a denial of service (memory corruption and crash) via crafted multibyte characters.

CVE-2013-1914 CVE-2013-4458

Stack-based buffer overflow in the getaddrinfo function allows remote attackers to cause a denial of service (crash) via a hostname or IP address that triggers a large number of domain conversion results.

CVE-2013-4237

readdir_r allows context-dependent attackers to cause a denial of service (out-of-bounds write and crash) or possibly execute arbitrary code via a malicious NTFS image or CIFS service.

CVE-2013-4332

Multiple integer overflows in malloc/malloc.c allow context-dependent attackers to cause a denial of service (heap corruption) via a large value to the pvalloc, valloc, posix_memalign, memalign, or aligned_alloc functions.

CVE-2013-4357

The getaliasbyname, getaliasbyname_r, getaddrinfo, getservbyname, getservbyname_r, getservbyport, getservbyport_r, and glob functions do not properly limit stack allocation, which allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code.

CVE-2013-4788

When the GNU C library is statically linked into an executable, the PTR_MANGLE implementation does not initialize the random value for the pointer guard, so that various hardening mechanisms are not effective.

CVE-2013-7423

The send_dg function in resolv/res_send.c does not properly reuse file descriptors, which allows remote attackers to send DNS queries to unintended locations via a large number of requests that trigger a call to the getaddrinfo function.

CVE-2013-7424

The getaddrinfo function may attempt to free an invalid pointer when handling IDNs (Internationalised Domain Names), which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code.

CVE-2014-4043

The posix_spawn_file_actions_addopen function does not copy its path argument in accordance with the POSIX specification, which allows context-dependent attackers to trigger use-after-free vulnerabilities.

For the oldstable distribution (squeeze), these problems have been fixed in version 2.11.3-4+deb6u5.

For the stable distribution (wheezy), these problems were fixed in version 2.13-38+deb7u8 or earlier.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote host is affected by the vulnerability described in GLSA-201503-04 (GNU C Library: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in the GNU C Library.
      Please review the CVE identifiers referenced below for details.
  Impact :

    A local attacker may be able to execute arbitrary code or cause a Denial       of Service condition,.
  Workaround :

    There is no known workaround at this time.

Several vulnerabilities have been fixed in eglibc, Debian's version of the GNU C library :

  - CVE-2012-3406     The vfprintf function in stdio-common/vfprintf.c in GNU     C Library (aka glibc) 2.5, 2.12, and probably other     versions does not 'properly restrict the use of' the     alloca function when allocating the SPECS array, which     allows context-dependent attackers to bypass the     FORTIFY_SOURCE format-string protection mechanism and     cause a denial of service (crash) or possibly execute     arbitrary code via a crafted format string using     positional parameters and a large number of format     specifiers, a different vulnerability than CVE-2012-3404     and CVE-2012-3405.

  - CVE-2013-7424     An invalid free flaw was found in glibc's getaddrinfo()     function when used with the AI_IDN flag. A remote     attacker able to make an application call this function     could use this flaw to execute arbitrary code with the     permissions of the user running the application. Note     that this flaw only affected applications using glibc     compiled with libidn support.

  - CVE-2014-4043     The posix_spawn_file_actions_addopen function in glibc     before 2.20 does not copy its path argument in     accordance with the POSIX specification, which allows     context-dependent attackers to trigger use-after-free     vulnerabilities.

  - CVE-2014-9402     The getnetbyname function in glibc 2.21 or earlier will     enter an infinite loop if the DNS backend is activated     in the system Name Service Switch configuration, and the     DNS resolver receives a positive answer while processing     the network name.

  - CVE-2015-1472 / CVE-2015-1473     Under certain conditions wscanf can allocate too little     memory for the to-be-scanned arguments and overflow the     allocated buffer. The incorrect use of     '__libc_use_alloca (newsize)' caused a different (and     weaker) policy to be enforced which could allow a denial     of service attack.

The remote Redhat Enterprise Linux 6 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2012:1200 advisory.

    The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization     Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor     is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes     everything necessary to run and manage virtual machines: A subset of the     Red Hat Enterprise Linux operating environment and the Red Hat Enterprise     Virtualization Agent.

    Note: Red Hat Enterprise Virtualization Hypervisor is only available for     the Intel 64 and AMD64 architectures with virtualization extensions.

    Multiple errors in glibc's formatted printing functionality could allow an     attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code     using a format string flaw in an application, even though these protections     are expected to limit the impact of such flaws to an application abort.
    (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

    This updated package provides updated components that include fixes for     various security issues. These issues have no security impact on Red Hat     Enterprise Virtualization Hypervisor itself, however. The security fixes     included in this update address the following CVE numbers:

    CVE-2012-3817 (bind issue)

    CVE-2012-3571 and CVE-2012-3954 (dhcp issues)

    CVE-2011-1078 and CVE-2012-2383 (kernel issues)

    CVE-2012-1013 and CVE-2012-1015 (krb5 issues)

    CVE-2012-0441 (nss issue)

    CVE-2012-2668 (openldap issue)

    CVE-2012-2337 (sudo issue)

    Users of Red Hat Enterprise Virtualization Hypervisor are advised to     upgrade to this updated package, which fixes these issues.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An updated rhev-hypervisor5 package that fixes one security issue and various bugs is now available.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The rhev-hypervisor5 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions.

It was discovered that the formatted printing functionality in glibc did not properly restrict the use of alloca(). This could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3406)

This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers :

CVE-2012-3817 (bind issue)

CVE-2012-3571 (dhcp issue)

CVE-2012-2313 (kernel issue)

CVE-2012-0441 (nss issue)

CVE-2012-2337 and CVE-2012-3440 (sudo issues)

CVE-2012-2625 (xen issue)

Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues.

The remote VMware ESXi 5.1 host is affected by the following security vulnerabilities :

  - An integer overflow condition exists in the glibc     library in the __tzfile_read() function that allows a     denial of service or arbitrary code execution.
    (CVE-2009-5029)

  - An error exists in the glibc library related to modified     loaders and 'LD_TRACE_LOADED_OBJECTS' checks that allow     arbitrary code execution. This issue is disputed by the     creators of glibc. (CVE-2009-5064)

  - An integer signedness error exists in the     elf_get_dynamic_info() function in elf/dynamic-link.h     that allows arbitrary code execution. (CVE-2010-0830)

  - An error exists in the glibc library in the addmntent()     function that allows a corruption of the '/etc/mtab'     file. (CVE-2011-1089)

  - An error exists in the libxslt library in the     xsltGenerateIdFunction() function that allows the     disclosure of sensitive information. (CVE-2011-1202)

  - An off-by-one overflow condition exists in the     xmlXPtrEvalXPtrPart() function due to improper     validation of user-supplied input. An unauthenticated,     remote attacker can exploit this, via a specially     crafted XML file, to cause a denial of service condition     or the execution of arbitrary code. (CVE-2011-3102)

  - An out-of-bounds read error exists in the libxslt     library in the xsltCompilePatternInternal() function     that allows a denial of service. (CVE-2011-3970)

  - An error exists in the glibc library in the svc_run()     function that allows a denial of service.
    (CVE-2011-4609)

  - An overflow error exists in the glibc library in the     printf() function related to 'nargs' parsing that allows     arbitrary code execution. (CVE-2012-0864)

  - Multiple integer overflow conditions exist due to     improper validation of user-supplied input when handling     overly long strings. An unauthenticated, remote     attacker can exploit this, via a specially crafted XML     file, to cause a denial of service condition or the     execution of arbitrary code. (CVE-2012-2807)

  - Multiple type-confusion errors exist in the     'IS_XSLT_ELEM' macro and the xsltApplyTemplates()     function that allow a denial of service or the     disclosure of sensitive information. (CVE-2012-2825,     CVE-2012-2871)

  - A use-after-free error exists in the libxslt library in     the xsltGenerateIdFunction() function that allows a     denial of service or arbitrary code execution.
    (CVE-2012-2870)

  - Multiple format string error exist in glibc that allow     arbitrary code execution. (CVE-2012-3404, CVE-2012-3405,     CVE-2012-3406)

  - Multiple overflow errors exist in the glibc functions     strtod(), strtof(), strtold(), and strtod_l() that allow     arbitrary code execution. (CVE-2012-3480)

  - A heap-based underflow condition exists in the bundled     libxml2 library due to incorrect parsing of strings not     containing an expected space. A remote attacker can     exploit this, via a specially crafted XML document, to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2012-5134)

  - An arbitrary file modification vulnerability due to     improper handling of certain Virtual Machine file     descriptors. A local attacker can exploit this to read     or modify arbitrary files. (CVE-2013-5973)

The remote VMware ESXi 5.0 host is affected by Multiple Vulnerabilities :

  - An integer overflow condition exists in the
    __tzfile_read() function in the glibc library. An     unauthenticated, remote attacker can exploit this, via     a crafted timezone (TZ) file, to cause a denial of     service or the execution of arbitrary code.
    (CVE-2009-5029)

  - ldd in the glibc library is affected by a privilege     escalation vulnerability due to the omission of certain     LD_TRACE_LOADED_OBJECTS checks in a crafted executable     file. Note that this vulnerability is disputed by the     library vendor. (CVE-2009-5064)

  - A remote code execution vulnerability exists in the     glibc library due to an integer signedness error in the     elf_get_dynamic_info() function when the '--verify'     option is used. A remote attacker can exploit this by     using a crafted ELF program with a negative value for a     certain d_tag structure member in the ELF header.
    (CVE-2010-0830)

  - A flaw exists in OpenSSL due to a failure to properly     prevent modification of the ciphersuite in the session     cache when SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG is     enabled. A remote attacker can exploit this to force a     downgrade to an unintended cipher by intercepting the     network traffic to discover a session identifier.
    (CVE-2010-4180)

  - A flaw exists in OpenSSL due to a failure to properly     validate the public parameters in the J-PAKE protocol     when J-PAKE is enabled. A remote attacker can exploit     this, by sending crafted values in each round of the     protocol, to bypass the need for knowledge of the shared     secret. (CVE-2010-4252)

  - A out-of-bounds memory error exists in OpenSSL that     allows a remote attacker to cause a denial of service or     possibly obtain sensitive information by using a     malformed ClientHello handshake message. This is also     known as the 'OCSP stapling vulnerability'.
    (CVE-2011-0014)

  - A flaw exists in the addmntent() function in the glibc     library due to a failure to report the error status for     failed attempts to write to the /etc/mtab file. A local     attacker can exploit this to corrupt the file by using     writes from a process with a small RLIMIT_FSIZE value.
    (CVE-2011-1089)

  - A flaw exists in the png_set_text_2() function in the     file pngset.c in the libpng library due to a failure to     properly allocate memory. An unauthenticated, remote     attacker can exploit this, via a crafted text chunk in a     PNG image file, to trigger a heap-based buffer overflow,     resulting in denial of service or the execution of     arbitrary code. (CVE-2011-3048)

  - A flaw exists in the DTLS implementation in OpenSSL due     to performing a MAC check only if certain padding is     valid. A remote attacker can exploit this, via a padding     oracle attack, to recover the plaintext. (CVE-2011-4108)

  - A double-free error exists in OpenSSL when the     X509_V_FLAG_POLICY_CHECK is enabled. A remote attacker     can exploit this by triggering a policy check failure,     resulting in an unspecified impact. (CVE-2011-4109)

  - A flaw exists in OpenSSL in the SSL 3.0 implementation     due to improper initialization of data structures used     for block cipher padding. A remote attacker can exploit     this, by decrypting the padding data sent by an SSL     peer, to obtain sensitive information. (CVE-2011-4576)

  - A denial of service vulnerability exists in OpenSSL when     RFC 3779 support is enabled. A remote attacker can     exploit this to cause an assertion failure, by using an     X.509 certificate containing certificate extension data     associated with IP address blocks or Autonomous System     (AS) identifiers. (CVE-2011-4577)

  - A denial of service vulnerability exists in the RPC     implementation in the glibc library due to a flaw in the     svc_run() function. A remote attacker can exploit this,     via large number of RPC connections, to exhaust CPU     resources. (CVE-2011-4609)

  - A denial of service vulnerability exists in the Server     Gated Cryptography (SGC) implementation in OpenSSL due     to a failure to properly handle handshake restarts. A     remote attacker can exploit this, via unspecified     vectors, to exhaust CPU resources. (CVE-2011-4619)

  - A denial of service vulnerability exists in OpenSSL due     to improper support of DTLS applications. A remote     attacker can exploit this, via unspecified vectors     related to an out-of-bounds read error. Note that this     vulnerability exists because of an incorrect fix for     CVE-2011-4108. (CVE-2012-0050)

  - A security bypass vulnerability exists in the glibc     library due to an integer overflow condition in the     vfprintf() function in file stdio-common/vfprintf.c. An     attacker can exploit this, by using a large number of     arguments, to bypass the FORTIFY_SOURCE protection     mechanism, allowing format string attacks or writing to     arbitrary memory. (CVE-2012-0864)

  - A denial of service vulnerability exists in the glibc     library in the vfprintf() function in file     stdio-common/vfprintf.c due to a failure to properly     calculate a buffer length. An attacker can exploit this,     via a format string that uses positional parameters and     many format specifiers, to bypass the FORTIFY_SOURCE     format-string protection mechanism, thus causing stack     corruption and a crash. (CVE-2012-3404)

  - A denial of service vulnerability exists in the glibc     library in the vfprintf() function in file     stdio-common/vfprintf.c due to a failure to properly     calculate a buffer length. An attacker can exploit this,     via a format string with a large number of format     specifiers, to bypass the FORTIFY_SOURCE format-string     protection mechanism, thus triggering desynchronization     within the buffer size handling, resulting in a     segmentation fault and crash. (CVE-2012-3405)

  - A flaw exists in the glibc library in the vfprintf()     function in file stdio-common/vfprintf.c due to a     failure to properly restrict the use of the alloca()     function when allocating the SPECS array. An attacker     can exploit this, via a crafted format string using     positional parameters and a large number of format     specifiers, to bypass the FORTIFY_SOURCE format-string     protection mechanism, thus triggering a denial of     service or the possible execution of arbitrary code.
    (CVE-2012-3406)

  - A flaw exists in the glibc library due to multiple     integer overflow conditions in the strtod(), strtof(),     strtold(), strtod_l(), and other unspecified related     functions. A local attacker can exploit these to trigger     a stack-based buffer overflow, resulting in an     application crash or the possible execution of arbitrary     code. (CVE-2012-3480)

  - A privilege escalation vulnerability exists in the     Virtual Machine Communication Interface (VMCI) due to a     failure by control code to properly restrict memory     allocation. A local attacker can exploit this, via     unspecified vectors, to gain privileges. (CVE-2013-1406)

  - An error exists in the implementation of the Network     File Copy (NFC) protocol. A man-in-the-middle attacker     can exploit this, by modifying the client-server data     stream, to cause a denial of service or the execution     of arbitrary code. (CVE-2013-1659)

Multiple errors in glibc's formatted printing functionality could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort.

From Red Hat Security Advisory 2012:1098 :

Updated glibc packages that fix three security issues and one bug are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The glibc packages provide the standard C and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

Multiple errors in glibc's formatted printing functionality could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

This update also fixes the following bug :

* A programming error caused an internal array of nameservers to be only partially initialized when the /etc/resolv.conf file contained IPv6 nameservers. Depending on the contents of a nearby structure, this could cause certain applications to terminate unexpectedly with a segmentation fault. The programming error has been fixed, which restores proper behavior with IPv6 nameservers listed in the /etc/resolv.conf file. (BZ#837026)

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

The remote Oracle Linux 5 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2012-1097 advisory.

    [2.5-81.el5_8.4]
    - Fix iconv() segfault if the invalid multibyte character 0xffff is input when converting from IBM930     (#837896)

    [2.5-81.el5_8.3]
    - Fix unbound alloca in vfprintf (#833720)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This collective update for the GNU C library (glibc) provides the following fixes :

  - Fix strtod integer/buffer overflows. (bnc#775690,     CVE-2012-3480)

  - Fix vfprintf handling of many format specifiers.
    (bnc#770891, CVE-2012-3404 / CVE-2012-3405 /     CVE-2012-3406)

  - Fix pthread_cond_timedwait stack unwinding. (bnc#750741,     bnc#777233)

  - Improve fix for dynamic library unloading. (bnc#783060)

  - Fix resolver when first query fails, but second one     succeeds. (bnc#767266)

a. vCenter Server Appliance directory traversal

   The vCenter Server Appliance (vCSA) contains a directory    traversal vulnerability that allows an authenticated    remote user to retrieve arbitrary files. Exploitation of    this issue may expose sensitive information stored on the    server. 

   VMware would like to thank Alexander Minozhenko from ERPScan for    reporting this issue to us.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-6324 to this issue.

 b. vCenter Server Appliance arbitrary file download

   The vCenter Server Appliance (vCSA) contains an XML parsing    vulnerability that allows an authenticated remote user to    retrieve arbitrary files.  Exploitation of this issue may    expose sensitive information stored on the server.

   VMware would like to thank Alexander Minozhenko from ERPScan for    reporting this issue to us.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-6325 to this issue.

 c. Update to ESX glibc package

   The ESX glibc package is updated to version glibc-2.5-81.el5_8.1    to resolve multiple security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2009-5029, CVE-2009-5064,    CVE-2010-0830, CVE-2011-1089, CVE-2011-4609, CVE-2012-0864    CVE-2012-3404, CVE-2012-3405, CVE-2012-3406 and CVE-2012-3480    to these issues.

 d. vCenter Server and vCSA webservice logging denial of service

   The vCenter Server and vCenter Server Appliance (vCSA) both    contain a vulnerability that allows unauthenticated remote    users to create abnormally large log entries.  Exploitation    of this issue may allow an attacker to fill the system volume    of the vCenter host or appliance VM and create a    denial-of-service condition. 

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-6326 to this issue.

USN-1589-1 fixed vulnerabilities in the GNU C Library. One of the updates exposed a regression in the floating point parser. This update fixes the problem.

We apologize for the inconvenience.

It was discovered that positional arguments to the printf() family of functions were not handled properly in the GNU C Library. An attacker could possibly use this to cause a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code.
(CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

It was discovered that multiple integer overflows existed in the strtod(), strtof() and strtold() functions in the GNU C Library. An attacker could possibly use this to trigger a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code. (CVE-2012-3480).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This collective update to the GNU Lib C library (glibc) provides the following fixes :

  - Make addmntent() return errors also for cached streams.
    (bnc#676178, CVE-2011-1089)

  - Fix overflows in vfprintf(). (bnc#770891, CVE-2012-3406)

  - Fix incomplete results from nscd. (bnc#753756)

  - Fix a deadlock in dlsym in case the symbol isn't found,     for multi-threaded programs. (bnc#760216)

It was discovered that positional arguments to the printf() family of functions were not handled properly in the GNU C Library. An attacker could possibly use this to cause a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code.
(CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

It was discovered that multiple integer overflows existed in the strtod(), strtof() and strtold() functions in the GNU C Library. An attacker could possibly use this to trigger a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code. (CVE-2012-3480).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Avoid unbound alloca in vfprintf (#841318)

Revert patch for BZ696143, it made it impossible to use IPV6 addresses explicitly in getaddrinfo, which in turn broke ssh, apache and other code. (#808147)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The glibc packages provide the standard C and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

Multiple errors in glibc's formatted printing functionality could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

This update also fixes the following bug :

  - A programming error caused an internal array of     nameservers to be only partially initialized when the     /etc/resolv.conf file contained IPv6 nameservers.
    Depending on the contents of a nearby structure, this     could cause certain applications to terminate     unexpectedly with a segmentation fault. The programming     error has been fixed, which restores proper behavior     with IPv6 nameservers listed in the /etc/resolv.conf     file.

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

The glibc packages provide the standard C and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

It was discovered that the formatted printing functionality in glibc did not properly restrict the use of alloca(). This could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3406)

This update also fixes the following bug :

  - If a file or a string was in the IBM-930 encoding, and     contained the invalid multibyte character '0xffff',     attempting to use iconv() (or the iconv command) to     convert that file or string to another encoding, such as     UTF-8, resulted in a segmentation fault. With this     update, the conversion code for the IBM-930 encoding     recognizes this invalid character and calls an error     handler, rather than causing a segmentation fault.

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

Updated glibc packages that fix three security issues and one bug are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The glibc packages provide the standard C and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

Multiple errors in glibc's formatted printing functionality could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

This update also fixes the following bug :

* A programming error caused an internal array of nameservers to be only partially initialized when the /etc/resolv.conf file contained IPv6 nameservers. Depending on the contents of a nearby structure, this could cause certain applications to terminate unexpectedly with a segmentation fault. The programming error has been fixed, which restores proper behavior with IPv6 nameservers listed in the /etc/resolv.conf file. (BZ#837026)

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

Updated glibc packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The glibc packages provide the standard C and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly.

It was discovered that the formatted printing functionality in glibc did not properly restrict the use of alloca(). This could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort. (CVE-2012-3406)

This update also fixes the following bug :

* If a file or a string was in the IBM-930 encoding, and contained the invalid multibyte character '0xffff', attempting to use iconv() (or the iconv command) to convert that file or string to another encoding, such as UTF-8, resulted in a segmentation fault. With this update, the conversion code for the IBM-930 encoding recognizes this invalid character and calls an error handler, rather than causing a segmentation fault. (BZ#837896)

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

ID	Name	Product	Family	Severity
83594	SUSE SLES11 Security Update : glibc (SUSE-SU-2013:1251-1)	Nessus	SuSE Local Security Checks	medium
83565	SUSE SLED10 / SLES10 Security Update : glibc (SUSE-SU-2012:1488-1)	Nessus	SuSE Local Security Checks	medium
82577	F5 Networks BIG-IP : GNU C Library (glibc) vulnerability (SOL16364)	Nessus	F5 Networks Local Security Checks	medium
82421	Mandriva Linux Security Advisory : glibc (MDVSA-2015:168)	Nessus	Mandriva Local Security Checks	high
82149	Debian DLA-165-1 : eglibc security update	Nessus	Debian Local Security Checks	high
81689	GLSA-201503-04 : GNU C Library: Multiple vulnerabilities (GHOST)	Nessus	Gentoo Local Security Checks	high
81448	Debian DSA-3169-1 : eglibc - security update	Nessus	Debian Local Security Checks	high
78931	RHEL 6 : rhev-hypervisor6 (RHSA-2012:1200)	Nessus	Red Hat Local Security Checks	critical
78930	RHEL 5 : rhev-hypervisor5 (RHSA-2012:1185)	Nessus	Red Hat Local Security Checks	medium
70886	ESXi 5.1 < Build 1063671 Multiple Vulnerabilities (remote check)	Nessus	Misc.	medium
70885	ESXi 5.0 < Build 912577 Multiple Vulnerabilities (remote check)	Nessus	Misc.	high
69599	Amazon Linux AMI : glibc (ALAS-2012-109)	Nessus	Amazon Linux Local Security Checks	medium
68583	Oracle Linux 6 : glibc (ELSA-2012-1098)	Nessus	Oracle Linux Local Security Checks	medium
68582	Oracle Linux 5 : glibc (ELSA-2012-1097)	Nessus	Oracle Linux Local Security Checks	critical
64150	SuSE 11.2 Security Update : glibc (SAT Patch Number 7110)	Nessus	SuSE Local Security Checks	medium
63332	VMSA-2012-0018 : VMware security updates for vCSA and ESXi	Nessus	VMware ESX Local Security Checks	high
63285	Ubuntu 8.04 LTS : glibc regression (USN-1589-2)	Nessus	Ubuntu Local Security Checks	medium
62960	SuSE 10 Security Update : glibc (ZYPP Patch Number 8351)	Nessus	SuSE Local Security Checks	medium
62388	Ubuntu 8.04 LTS / 10.04 LTS / 11.04 / 11.10 / 12.04 LTS : eglibc, glibc vulnerabilities (USN-1589-1)	Nessus	Ubuntu Local Security Checks	medium
61556	Fedora 17 : glibc-2.15-54.fc17 (2012-11508)	Nessus	Fedora Local Security Checks	medium
61369	Scientific Linux Security Update : glibc on SL6.x i386/x86_64 (20120718)	Nessus	Scientific Linux Local Security Checks	medium
61368	Scientific Linux Security Update : glibc on SL5.x i386/x86_64 (20120718)	Nessus	Scientific Linux Local Security Checks	medium
60066	CentOS 6 : glibc (CESA-2012:1098)	Nessus	CentOS Local Security Checks	medium
60058	RHEL 6 : glibc (RHSA-2012:1098)	Nessus	Red Hat Local Security Checks	medium
60057	RHEL 5 : glibc (RHSA-2012:1097)	Nessus	Red Hat Local Security Checks	medium
60054	CentOS 5 : glibc (CESA-2012:1097)	Nessus	CentOS Local Security Checks	medium

Detections

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CVE-2012-3406

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