The binfmt functionality in the Linux kernel, when "memory overcommit" is enabled, allows local users to cause a denial of service (kernel oops) via a malformed a.out binary.

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2004-0427     A local denial of service vulnerability in do_fork() has     been found.

  - CVE-2005-0489     A local denial of service vulnerability in proc memory     handling has been found.

  - CVE-2004-0394     A buffer overflow in the panic handling code has been     found.

  - CVE-2004-0447     A local denial of service vulnerability through a NULL     pointer dereference in the IA64 process handling code     has been found.

  - CVE-2004-0554     A local denial of service vulnerability through an     infinite loop in the signal handler code has been found.

  - CVE-2004-0565     An information leak in the context switch code has been     found on the IA64 architecture.

  - CVE-2004-0685     Unsafe use of copy_to_user in USB drivers may disclose     sensitive information.

  - CVE-2005-0001     A race condition in the i386 page fault handler may     allow privilege escalation.

  - CVE-2004-0883     Multiple vulnerabilities in the SMB filesystem code may     allow denial of service or information disclosure.

  - CVE-2004-0949     An information leak discovered in the SMB filesystem     code.

  - CVE-2004-1016     A local denial of service vulnerability has been found     in the SCM layer.

  - CVE-2004-1333     An integer overflow in the terminal code may allow a     local denial of service vulnerability.

  - CVE-2004-0997     A local privilege escalation in the MIPS assembly code     has been found.

  - CVE-2004-1335     A memory leak in the ip_options_get() function may lead     to denial of service.

  - CVE-2004-1017     Multiple overflows exist in the io_edgeport driver which     might be usable as a denial of service attack vector.

  - CVE-2005-0124     Bryan Fulton reported a bounds checking bug in the     coda_pioctl function which may allow local users to     execute arbitrary code or trigger a denial of service     attack.

  - CVE-2003-0984     Inproper initialization of the RTC may disclose     information.

  - CVE-2004-1070     Insufficient input sanitising in the load_elf_binary()     function may lead to privilege escalation.

  - CVE-2004-1071     Incorrect error handling in the binfmt_elf loader may     lead to privilege escalation.

  - CVE-2004-1072     A buffer overflow in the binfmt_elf loader may lead to     privilege escalation or denial of service.

  - CVE-2004-1073     The open_exec function may disclose information.

  - CVE-2004-1074     The binfmt code is vulnerable to denial of service     through malformed a.out binaries.

  - CVE-2004-0138     A denial of service vulnerability in the ELF loader has     been found.

  - CVE-2004-1068     A programming error in the unix_dgram_recvmsg() function     may lead to privilege escalation.

  - CVE-2004-1234     The ELF loader is vulnerable to denial of service     through malformed binaries.

  - CVE-2005-0003     Crafted ELF binaries may lead to privilege escalation,     due to insufficient checking of overlapping memory     regions.

  - CVE-2004-1235     A race condition in the load_elf_library() and     binfmt_aout() functions may allow privilege escalation.

  - CVE-2005-0504     An integer overflow in the Moxa driver may lead to     privilege escalation.

  - CVE-2005-0384     A remote denial of service vulnerability has been found     in the PPP driver.

  - CVE-2005-0135     An IA64 specific local denial of service vulnerability     has been found in the unw_unwind_to_user() function.

The following matrix explains which kernel version for which architecture fixes the problems mentioned above :

                                Debian 3.1 (sarge)              Source                        2.4.17-1woody4                  HP Precision architecture     32.5                            Intel IA-64 architecture      011226.18                       IBM S/390 architecture/image  2.4.17-2.woody.5                IBM S/390 architecture/patch  0.0.20020816-0.woody.4          PowerPC architecture (apus)   2.4.17-6                        MIPS architecture             2.4.17-0.020226.2.woody7

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2004-0427     A local denial of service vulnerability in do_fork() has     been found.

  - CVE-2005-0489     A local denial of service vulnerability in proc memory     handling has been found.

  - CVE-2004-0394     A buffer overflow in the panic handling code has been     found.

  - CVE-2004-0447     A local denial of service vulnerability through a NULL     pointer dereference in the IA64 process handling code     has been found.

  - CVE-2004-0554     A local denial of service vulnerability through an     infinite loop in the signal handler code has been found.

  - CVE-2004-0565     An information leak in the context switch code has been     found on the IA64 architecture.

  - CVE-2004-0685     Unsafe use of copy_to_user in USB drivers may disclose     sensitive information.

  - CVE-2005-0001     A race condition in the i386 page fault handler may     allow privilege escalation.

  - CVE-2004-0883     Multiple vulnerabilities in the SMB filesystem code may     allow denial of service or information disclosure.

  - CVE-2004-0949     An information leak discovered in the SMB filesystem     code.

  - CVE-2004-1016     A local denial of service vulnerability has been found     in the SCM layer.

  - CVE-2004-1333     An integer overflow in the terminal code may allow a     local denial of service vulnerability.

  - CVE-2004-0997     A local privilege escalation in the MIPS assembly code     has been found.

  - CVE-2004-1335     A memory leak in the ip_options_get() function may lead     to denial of service.

  - CVE-2004-1017     Multiple overflows exist in the io_edgeport driver which     might be usable as a denial of service attack vector.

  - CVE-2005-0124     Bryan Fulton reported a bounds checking bug in the     coda_pioctl function which may allow local users to     execute arbitrary code or trigger a denial of service     attack.

  - CVE-2003-0984     Inproper initialization of the RTC may disclose     information.

  - CVE-2004-1070     Insufficient input sanitising in the load_elf_binary()     function may lead to privilege escalation.

  - CVE-2004-1071     Incorrect error handling in the binfmt_elf loader may     lead to privilege escalation.

  - CVE-2004-1072     A buffer overflow in the binfmt_elf loader may lead to     privilege escalation or denial of service.

  - CVE-2004-1073     The open_exec function may disclose information.

  - CVE-2004-1074     The binfmt code is vulnerable to denial of service     through malformed a.out binaries.

  - CVE-2004-0138     A denial of service vulnerability in the ELF loader has     been found.

  - CVE-2004-1068     A programming error in the unix_dgram_recvmsg() function     may lead to privilege escalation.

  - CVE-2004-1234     The ELF loader is vulnerable to denial of service     through malformed binaries.

  - CVE-2005-0003     Crafted ELF binaries may lead to privilege escalation,     due to insufficient checking of overlapping memory     regions.

  - CVE-2004-1235     A race condition in the load_elf_library() and     binfmt_aout() functions may allow privilege escalation.

  - CVE-2005-0504     An integer overflow in the Moxa driver may lead to     privilege escalation.

  - CVE-2005-0384     A remote denial of service vulnerability has been found     in the PPP driver.

  - CVE-2005-0135     An IA64 specific local denial of service vulnerability     has been found in the unw_unwind_to_user() function.

The following matrix explains which kernel version for which architecture fixes the problems mentioned above :

                                   Debian 3.0 (woody)                 Source                           2.4.19-4                           Sun Sparc architecture           26woody1                           Little endian MIPS architecture  0.020911.1.woody5

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2004-0427     A local denial of service vulnerability in do_fork() has     been found.

  - CVE-2005-0489     A local denial of service vulnerability in proc memory     handling has been found.

  - CVE-2004-0394     A buffer overflow in the panic handling code has been     found.

  - CVE-2004-0447     A local denial of service vulnerability through a NULL     pointer dereference in the IA64 process handling code     has been found.

  - CVE-2004-0554     A local denial of service vulnerability through an     infinite loop in the signal handler code has been found.

  - CVE-2004-0565     An information leak in the context switch code has been     found on the IA64 architecture.

  - CVE-2004-0685     Unsafe use of copy_to_user in USB drivers may disclose     sensitive information.

  - CVE-2005-0001     A race condition in the i386 page fault handler may     allow privilege escalation.

  - CVE-2004-0883     Multiple vulnerabilities in the SMB filesystem code may     allow denial of service or information disclosure.

  - CVE-2004-0949     An information leak discovered in the SMB filesystem     code.

  - CVE-2004-1016     A local denial of service vulnerability has been found     in the SCM layer.

  - CVE-2004-1333     An integer overflow in the terminal code may allow a     local denial of service vulnerability.

  - CVE-2004-0997     A local privilege escalation in the MIPS assembly code     has been found.

  - CVE-2004-1335     A memory leak in the ip_options_get() function may lead     to denial of service.

  - CVE-2004-1017     Multiple overflows exist in the io_edgeport driver which     might be usable as a denial of service attack vector.

  - CVE-2005-0124     Bryan Fulton reported a bounds checking bug in the     coda_pioctl function which may allow local users to     execute arbitrary code or trigger a denial of service     attack.

  - CVE-2003-0984     Inproper initialization of the RTC may disclose     information.

  - CVE-2004-1070     Insufficient input sanitising in the load_elf_binary()     function may lead to privilege escalation.

  - CVE-2004-1071     Incorrect error handling in the binfmt_elf loader may     lead to privilege escalation.

  - CVE-2004-1072     A buffer overflow in the binfmt_elf loader may lead to     privilege escalation or denial of service.

  - CVE-2004-1073     The open_exec function may disclose information.

  - CVE-2004-1074     The binfmt code is vulnerable to denial of service     through malformed a.out binaries.

  - CVE-2004-0138     A denial of service vulnerability in the ELF loader has     been found.

  - CVE-2004-1068     A programming error in the unix_dgram_recvmsg() function     may lead to privilege escalation.

  - CVE-2004-1234     The ELF loader is vulnerable to denial of service     through malformed binaries.

  - CVE-2005-0003     Crafted ELF binaries may lead to privilege escalation,     due to insufficient checking of overlapping memory     regions.

  - CVE-2004-1235     A race condition in the load_elf_library() and     binfmt_aout() functions may allow privilege escalation.

  - CVE-2005-0504     An integer overflow in the Moxa driver may lead to     privilege escalation.

  - CVE-2005-0384     A remote denial of service vulnerability has been found     in the PPP driver.

  - CVE-2005-0135     An IA64 specific local denial of service vulnerability     has been found in the unw_unwind_to_user() function.

The following matrix explains which kernel version for which architecture fixes the problems mentioned above :

                                   Debian 3.0 (woody)                 Source                           2.4.18-14.4                        Alpha architecture               2.4.18-15woody1                    Intel IA-32 architecture         2.4.18-13.2                        HP Precision architecture        62.4                               PowerPC architecture             2.4.18-1woody6                     PowerPC architecture/XFS         20020329woody1                     PowerPC architecture/benh        20020304woody1                     Sun Sparc architecture           22woody1

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2004-0427     A local denial of service vulnerability in do_fork() has     been found.

  - CVE-2005-0489     A local denial of service vulnerability in proc memory     handling has been found.

  - CVE-2004-0394     A buffer overflow in the panic handling code has been     found.

  - CVE-2004-0447     A local denial of service vulnerability through a NULL     pointer dereference in the IA64 process handling code     has been found.

  - CVE-2004-0554     A local denial of service vulnerability through an     infinite loop in the signal handler code has been found.

  - CVE-2004-0565     An information leak in the context switch code has been     found on the IA64 architecture.

  - CVE-2004-0685     Unsafe use of copy_to_user in USB drivers may disclose     sensitive information.

  - CVE-2005-0001     A race condition in the i386 page fault handler may     allow privilege escalation.

  - CVE-2004-0883     Multiple vulnerabilities in the SMB filesystem code may     allow denial of service or information disclosure.

  - CVE-2004-0949     An information leak discovered in the SMB filesystem     code.

  - CVE-2004-1016     A local denial of service vulnerability has been found     in the SCM layer.

  - CVE-2004-1333     An integer overflow in the terminal code may allow a     local denial of service vulnerability.

  - CVE-2004-0997     A local privilege escalation in the MIPS assembly code     has been found.

  - CVE-2004-1335     A memory leak in the ip_options_get() function may lead     to denial of service.

  - CVE-2004-1017     Multiple overflows exist in the io_edgeport driver which     might be usable as a denial of service attack vector.

  - CVE-2005-0124     Bryan Fulton reported a bounds checking bug in the     coda_pioctl function which may allow local users to     execute arbitrary code or trigger a denial of service     attack.

  - CVE-2003-0984     Inproper initialization of the RTC may disclose     information.

  - CVE-2004-1070     Insufficient input sanitising in the load_elf_binary()     function may lead to privilege escalation.

  - CVE-2004-1071     Incorrect error handling in the binfmt_elf loader may     lead to privilege escalation.

  - CVE-2004-1072     A buffer overflow in the binfmt_elf loader may lead to     privilege escalation or denial of service.

  - CVE-2004-1073     The open_exec function may disclose information.

  - CVE-2004-1074     The binfmt code is vulnerable to denial of service     through malformed a.out binaries.

  - CVE-2004-0138     A denial of service vulnerability in the ELF loader has     been found.

  - CVE-2004-1068     A programming error in the unix_dgram_recvmsg() function     may lead to privilege escalation.

  - CVE-2004-1234     The ELF loader is vulnerable to denial of service     through malformed binaries.

  - CVE-2005-0003     Crafted ELF binaries may lead to privilege escalation,     due to insufficient checking of overlapping memory     regions.

  - CVE-2004-1235     A race condition in the load_elf_library() and     binfmt_aout() functions may allow privilege escalation.

  - CVE-2005-0504     An integer overflow in the Moxa driver may lead to     privilege escalation.

  - CVE-2005-0384     A remote denial of service vulnerability has been found     in the PPP driver.

  - CVE-2005-0135     An IA64 specific local denial of service vulnerability     has been found in the unw_unwind_to_user() function.

The following matrix explains which kernel version for which architecture fixes the problems mentioned above :

                               Debian 3.0 (woody)             Source                       2.4.16-1woody2                 arm/lart                     20040419woody1                 arm/netwinder                20040419woody1                 arm/riscpc                   20040419woody1

USN-30-1 fixed several flaws in the Linux ELF binary loader's handling of setuid binaries. Unfortunately it was found that these patches were not sufficient to prevent all possible attacks on 64-bit platforms, so previous amd64 kernel images were still vulnerable to root privilege escalation if setuid binaries were run under certain conditions.

This issue does not affect the i386 and powerpc platforms.

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.

A number of vulnerabilities are fixed in the 2.4 and 2.6 kernels with this advisory :

  - Multiple race conditions in the terminal layer of 2.4     and 2.6 kernels (prior to 2.6.9) can allow a local     attacker to obtain portions of kernel data or allow     remote attackers to cause a kernel panic by switching     from console to PPP line discipline, then quickly     sending data that is received during the switch     (CVE-2004-0814)

  - Richard Hart found an integer underflow problem in the     iptables firewall logging rules that can allow a remote     attacker to crash the machine by using a specially     crafted IP packet. This is only possible, however, if     firewalling is enabled. The problem only affects 2.6     kernels and was fixed upstream in 2.6.8 (CVE-2004-0816)

  - Stefan Esser found several remote DoS confitions in the     smbfs file system. This could be exploited by a hostile     SMB server (or an attacker injecting packets into the     network) to crash the client systems (CVE-2004-0883 and     CVE-2004-0949)

  - Paul Starzetz and Georgi Guninski reported,     independently, that bad argument handling and bad     integer arithmetics in the IPv4 sendmsg handling of     control messages could lead to a local attacker crashing     the machine. The fixes were done by Herbert Xu     (CVE-2004-1016)

  - Rob Landley discovered a race condition in the handling     of /proc/.../cmdline where, under rare circumstances, a     user could read the environment variables of another     process that was still spawning leading to the potential     disclosure of sensitive information such as passwords     (CVE-2004-1058)

  - Paul Starzetz reported that the missing serialization in     unix_dgram_recvmsg() which was added to kernel 2.4.28     can be used by a local attacker to gain elevated (root)     privileges (CVE-2004-1068)

  - Ross Kendall Axe discovered a possible kernel panic     (DoS) while sending AF_UNIX network packets if certain     SELinux-related kernel options were enabled. By default     the CONFIG_SECURITY_NETWORK and CONFIG_SECURITY_SELINUX     options are not enabled (CVE-2004-1069)

  - Paul Starzetz of isec.pl discovered several issues with     the error handling of the ELF loader routines in the     kernel. The fixes were provided by Chris Wright     (CVE-2004-1070, CVE-2004-1071, CVE-2004-1072,     CVE-2004-1073)

  - It was discovered that hand-crafted a.out binaries could     be used to trigger a local DoS condition in both the 2.4     and 2.6 kernels. The fixes were done by Chris Wright     (CVE-2004-1074)

  - Paul Starzetz found bad handling in the IGMP code which     could lead to a local attacker being able to crash the     machine. The fix was done by Chris Wright     (CVE-2004-1137)

  - Jeremy Fitzhardinge discovered two buffer overflows in     the sys32_ni_syscall() and sys32_vm86_warning()     functions that could be used to overwrite kernel memory     with attacker-supplied code resulting in privilege     escalation (CVE-2004-1151)

  - Paul Starzetz found locally exploitable flaws in the     binary format loader's uselib() function that could be     abused to allow a local user to obtain root privileges     (CVE-2004-1235)

  - Paul Starzetz found an exploitable flaw in the page     fault handler when running on SMP machines     (CVE-2005-0001)

  - A vulnerability in insert_vm_struct could allow a locla     user to trigger BUG() when the user created a large vma     that overlapped with arg pages during exec     (CVE-2005-0003)

  - Paul Starzetz also found a number of vulnerabilities in     the kernel binfmt_elf loader that could lead a local     user to obtain elevated (root) privileges     (isec-0017-binfmt_elf)

The provided packages are patched to fix these vulnerabilities. All users are encouraged to upgrade to these updated kernels.

To update your kernel, please follow the directions located at :

http://www.mandrakesoft.com/security/kernelupdate

PLEASE NOTE: Mandrakelinux 10.0 users will need to upgrade to the latest module-init-tools package prior to upgrading their kernel.
Likewise, MNF8.2 users will need to upgrade to the latest modutils package prior to upgrading their kernel.

Updated kernel packages that fix several security issues in Red Hat Enterprise Linux 3 are now available.

The Linux kernel handles the basic functions of the operating system.

This advisory includes fixes for several security issues :

iSEC Security Research discovered a VMA handling flaw in the uselib(2) system call of the Linux kernel. A local user could make use of this flaw to gain elevated (root) privileges. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1235 to this issue.

A flaw was discovered where an executable could cause a VMA overlap leading to a crash. A local user could trigger this flaw by creating a carefully crafted a.out binary on 32-bit systems or a carefully crafted ELF binary on Itanium systems. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0003 to this issue.

iSEC Security Research discovered a flaw in the page fault handler code that could lead to local users gaining elevated (root) privileges on multiprocessor machines. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0001 to this issue. A patch that coincidentally fixed this issue was committed to the Update 4 kernel release in December 2004. Therefore Red Hat Enterprise Linux 3 kernels provided by RHBA-2004:550 and subsequent updates are not vulnerable to this issue.

A flaw in the system call filtering code in the audit subsystem included in Red Hat Enterprise Linux 3 allowed a local user to cause a crash when auditing was enabled. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1237 to this issue.

Olaf Kirch discovered that the recent security fixes for cmsg_len handling (CVE-2004-1016) broke 32-bit compatibility on 64-bit platforms such as AMD64 and Intel EM64T. A patch to correct this issue is included.

A recent Internet Draft by Fernando Gont recommended that ICMP Source Quench messages be ignored by hosts. A patch to ignore these messages is included.

Note: The kernel-unsupported package contains various drivers and modules that are unsupported and therefore might contain security problems that have not been addressed.

All Red Hat Enterprise Linux 3 users are advised to upgrade their kernels to the packages associated with their machine architectures and configurations as listed in this erratum.

Updated kernel packages that fix several security issues in Red Hat
Enterprise Linux 3 are now available.

The Linux kernel handles the basic functions of the operating system.

This advisory includes fixes for several security issues :

iSEC Security Research discovered a VMA handling flaw in the uselib(2)
system call of the Linux kernel. A local user could make use of this
flaw to gain elevated (root) privileges. The Common Vulnerabilities
and Exposures project (cve.mitre.org) has assigned the name
CVE-2004-1235 to this issue.

A flaw was discovered where an executable could cause a VMA overlap
leading to a crash. A local user could trigger this flaw by creating a
carefully crafted a.out binary on 32-bit systems or a carefully
crafted ELF binary on Itanium systems. The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CVE-2005-0003
to this issue.

iSEC Security Research discovered a flaw in the page fault handler
code that could lead to local users gaining elevated (root) privileges
on multiprocessor machines. The Common Vulnerabilities and Exposures
project (cve.mitre.org) has assigned the name CVE-2005-0001 to this
issue. A patch that coincidentally fixed this issue was committed to
the Update 4 kernel release in December 2004. Therefore Red Hat
Enterprise Linux 3 kernels provided by RHBA-2004:550 and subsequent
updates are not vulnerable to this issue.

A flaw in the system call filtering code in the audit subsystem
included in Red Hat Enterprise Linux 3 allowed a local user to cause a
crash when auditing was enabled. The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CVE-2004-1237
to this issue.

Olaf Kirch discovered that the recent security fixes for cmsg_len
handling (CVE-2004-1016) broke 32-bit compatibility on 64-bit
platforms such as AMD64 and Intel EM64T. A patch to correct this issue
is included.

A recent Internet Draft by Fernando Gont recommended that ICMP Source
Quench messages be ignored by hosts. A patch to ignore these messages
is included.

Note: The kernel-unsupported package contains various drivers and
modules that are unsupported and therefore might contain security
problems that have not been addressed.

All Red Hat Enterprise Linux 3 users are advised to upgrade their
kernels to the packages associated with their machine architectures
and configurations as listed in this erratum.

ID	Name	Product	Family	Severity
22624	Debian DSA-1082-1 : kernel-source-2.4.17 - several vulnerabilities	Nessus	Debian Local Security Checks	critical
22612	Debian DSA-1070-1 : kernel-source-2.4.19 - several vulnerabilities	Nessus	Debian Local Security Checks	critical
22611	Debian DSA-1069-1 : kernel-source-2.4.18 - several vulnerabilities	Nessus	Debian Local Security Checks	critical
22609	Debian DSA-1067-1 : kernel-source-2.4.16 - several vulnerabilities	Nessus	Debian Local Security Checks	critical
20655	Ubuntu 4.10 : linux-source-2.6.8.1 vulnerability (USN-39-1)	Nessus	Ubuntu Local Security Checks	low
16259	Mandrake Linux Security Advisory : kernel (MDKSA-2005:022)	Nessus	Mandriva Local Security Checks	critical
16211	RHEL 3 : kernel (RHSA-2005:043)	Nessus	Red Hat Local Security Checks	medium
801604	Red Hat 2005-043 Security Check	Log Correlation Engine	Generic	high

Detections

Analytics

CVE-2004-1074

medium

Tenable Plugins

critical

critical

critical

critical

low

critical

medium

high