The unw_unwind_to_user function in unwind.c on Itanium (ia64) architectures in Linux kernel 2.6 allows local users to cause a denial of service (system crash).

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

Updated kernel packages that fix several security issues are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

[Updated 9 August 2005] The advisory text has been updated to show that this update fixed the security issue named CVE-2005-0210 but not CVE-2005-0209. The issue CVE-2005-0209 was actually fixed by RHSA-2005:420. No changes have been made to the packages associated with this advisory.

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

A flaw in the fib_seq_start function was discovered. A local user could use this flaw to cause a denial of service (system crash) via /proc/net/route. (CVE-2005-1041)

A flaw in the tmpfs file system was discovered. A local user could use this flaw to cause a denial of service (system crash). (CVE-2005-0977)

An integer overflow flaw was found when writing to a sysfs file. A local user could use this flaw to overwrite kernel memory, causing a denial of service (system crash) or arbitrary code execution.
(CVE-2005-0867)

Keith Owens reported a flaw in the Itanium unw_unwind_to_user function. A local user could use this flaw to cause a denial of service (system crash) on Itanium architectures. (CVE-2005-0135)

A flaw in the NFS client O_DIRECT error case handling was discovered.
A local user could use this flaw to cause a denial of service (system crash). (CVE-2005-0207)

A small memory leak when defragmenting local packets was discovered that affected the Linux 2.6 kernel netfilter subsystem. A local user could send a large number of carefully crafted fragments leading to memory exhaustion (CVE-2005-0210)

A flaw was discovered in the Linux PPP driver. On systems allowing remote users to connect to a server using ppp, a remote client could cause a denial of service (system crash). (CVE-2005-0384)

A flaw was discovered in the ext2 file system code. When a new directory is created, the ext2 block written to disk is not initialized, which could lead to an information leak if a disk image is made available to unprivileged users. (CVE-2005-0400)

A flaw in fragment queuing was discovered that affected the Linux kernel netfilter subsystem. On systems configured to filter or process network packets (e.g. firewalling), a remote attacker could send a carefully crafted set of fragmented packets to a machine and cause a denial of service (system crash). In order to sucessfully exploit this flaw, the attacker would need to know or guess some aspects of the firewall ruleset on the target system. (CVE-2005-0449)

A number of flaws were found in the Linux 2.6 kernel. A local user could use these flaws to read kernel memory or cause a denial of service (crash). (CVE-2005-0529, CVE-2005-0530, CVE-2005-0531)

An integer overflow in sys_epoll_wait in eventpoll.c was discovered. A local user could use this flaw to overwrite low kernel memory. This memory is usually unused, not usually resulting in a security consequence. (CVE-2005-0736)

A flaw when freeing a pointer in load_elf_library was discovered. A local user could potentially use this flaw to cause a denial of service (crash). (CVE-2005-0749)

A flaw was discovered in the bluetooth driver system. On systems where the bluetooth modules are loaded, a local user could use this flaw to gain elevated (root) privileges. (CVE-2005-0750)

A race condition was discovered that affected the Radeon DRI driver. A local user who has DRI privileges on a Radeon graphics card may be able to use this flaw to gain root privileges. (CVE-2005-0767)

Multiple range checking flaws were discovered in the iso9660 file system handler. An attacker could create a malicious file system image which would cause a denial or service or potentially execute arbitrary code if mounted. (CVE-2005-0815)

A flaw was discovered when setting line discipline on a serial tty. A local user may be able to use this flaw to inject mouse movements or keystrokes when another user is logged in. (CVE-2005-0839)

Red Hat Enterprise Linux 4 users are advised to upgrade their kernels to the packages associated with their machine architectures and configurations as listed in this erratum.

Please note that

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

This security advisory has been rated as having important security impact by the Red Hat Security Response Team.

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

The following security issues were fixed :

The Vicam USB driver did not use the copy_from_user function to access userspace, crossing security boundaries. (CVE-2004-0075)

The ext3 and jfs code did not properly initialize journal descriptor blocks. A privileged local user could read portions of kernel memory.
(CVE-2004-0177)

The terminal layer did not properly lock line discipline changes or pending IO. An unprivileged local user could read portions of kernel memory, or cause a denial of service (system crash). (CVE-2004-0814)

A race condition was discovered. Local users could use this flaw to read the environment variables of another process that is still spawning via /proc/.../cmdline. (CVE-2004-1058)

A flaw in the execve() syscall handling was discovered, allowing a local user to read setuid ELF binaries that should otherwise be protected by standard permissions. (CVE-2004-1073). Red Hat originally reported this as being fixed by RHSA-2004:549, but the associated fix was missing from that update.

Keith Owens reported a flaw in the Itanium unw_unwind_to_user() function. A local user could use this flaw to cause a denial of service (system crash) on the Itanium architecture. (CVE-2005-0135)

A missing Itanium syscall table entry could allow an unprivileged local user to cause a denial of service (system crash) on the Itanium architecture. (CVE-2005-0137)

A flaw affecting the OUTS instruction on the AMD64 and Intel EM64T architectures was discovered. A local user could use this flaw to access privileged IO ports. (CVE-2005-0204)

A flaw was discovered in the Linux PPP driver. On systems allowing remote users to connect to a server using ppp, a remote client could cause a denial of service (system crash). (CVE-2005-0384)

A flaw in the Red Hat backport of NPTL to Red Hat Enterprise Linux 3 was discovered that left a pointer to a freed tty structure. A local user could potentially use this flaw to cause a denial of service (system crash) or possibly gain read or write access to ttys that should normally be prevented. (CVE-2005-0403)

A flaw in fragment queuing was discovered affecting the netfilter subsystem. On systems configured to filter or process network packets (for example those configured to do firewalling), a remote attacker could send a carefully crafted set of fragmented packets to a machine and cause a denial of service (system crash). In order to sucessfully exploit this flaw, the attacker would need to know (or guess) some aspects of the firewall ruleset in place on the target system to be able to craft the right fragmented packets. (CVE-2005-0449)

Missing validation of an epoll_wait() system call parameter could allow a local user to cause a denial of service (system crash) on the IBM S/390 and zSeries architectures. (CVE-2005-0736)

A flaw when freeing a pointer in load_elf_library was discovered. A local user could potentially use this flaw to cause a denial of service (system crash). (CVE-2005-0749)

A flaw was discovered in the bluetooth driver system. On system where the bluetooth modules are loaded, a local user could use this flaw to gain elevated (root) privileges. (CVE-2005-0750)

In addition to the security issues listed above, there was an important fix made to the handling of the msync() system call for a particular case in which the call could return without queuing modified mmap()'ed data for file system update. (BZ 147969)

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

Red Hat Enterprise Linux 3 users are advised to upgrade their kernels to the packages associated with their machine architectures/configurations

Please note that the fix for CVE-2005-0449 required changing the external symbol linkages (kernel module ABI) for the ip_defrag() and ip_ct_gather_frags() functions. Any third-party module using either of these would also need to be fixed.

The remote Redhat Enterprise Linux 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2005:366 advisory.

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

    A flaw in the fib_seq_start function was discovered. A local user could use     this flaw to cause a denial of service (system crash) via /proc/net/route.
    (CAN-2005-1041)

    A flaw in the tmpfs file system was discovered. A local user could use this     flaw to cause a denial of service (system crash). (CAN-2005-0977)

    An integer overflow flaw was found when writing to a sysfs file. A local     user could use this flaw to overwrite kernel memory, causing a denial of     service (system crash) or arbitrary code execution. (CAN-2005-0867)

    Keith Owens reported a flaw in the Itanium unw_unwind_to_user function. A     local user could use this flaw to cause a denial of service (system crash)     on Itanium architectures. (CAN-2005-0135)

    A flaw in the NFS client O_DIRECT error case handling was discovered. A     local user could use this flaw to cause a denial of service (system crash).
    (CAN-2005-0207)

    A small memory leak when defragmenting local packets was discovered that     affected the Linux 2.6 kernel netfilter subsystem.  A local user could send     a large number of carefully crafted fragments leading to memory exhaustion     (CAN-2005-0210)

    A flaw was discovered in the Linux PPP driver. On systems allowing remote     users to connect to a server using ppp, a remote client could cause a     denial of service (system crash). (CAN-2005-0384)

    A flaw was discovered in the ext2 file system code. When a new directory is     created, the ext2 block written to disk is not initialized, which could     lead to an information leak if a disk image is made available to     unprivileged users. (CAN-2005-0400)

    A flaw in fragment queuing was discovered that affected the Linux kernel     netfilter subsystem. On systems configured to filter or process network     packets (e.g. firewalling), a remote attacker could send a carefully     crafted set of fragmented packets to a machine and cause a denial of     service (system crash). In order to sucessfully exploit this flaw, the     attacker would need to know or guess some aspects of the firewall ruleset     on the target system. (CAN-2005-0449)

    A number of flaws were found in the Linux 2.6 kernel. A local user could     use these flaws to read kernel memory or cause a denial of service (crash).
    (CAN-2005-0529, CAN-2005-0530, CAN-2005-0531)

    An integer overflow in sys_epoll_wait in eventpoll.c was discovered. A     local user could use this flaw to overwrite low kernel memory. This memory     is usually unused, not usually resulting in a security consequence.
    (CAN-2005-0736)

    A flaw when freeing a pointer in load_elf_library was discovered. A local     user could potentially use this flaw to cause a denial of service (crash).
    (CAN-2005-0749)

    A flaw was discovered in the bluetooth driver system. On systems where the     bluetooth modules are loaded, a local user could use this flaw to gain     elevated (root) privileges. (CAN-2005-0750)

    A race condition was discovered that affected the Radeon DRI driver. A     local user who has DRI privileges on a Radeon graphics card may be able to     use this flaw to gain root privileges. (CAN-2005-0767)

    Multiple range checking flaws were discovered in the iso9660 file system     handler. An attacker could create a malicious file system image which would     cause a denial or service or potentially execute arbitrary code if mounted.
    (CAN-2005-0815)

    A flaw was discovered when setting line discipline on a serial tty. A local     user may be able to use this flaw to inject mouse movements or keystrokes     when another user is logged in. (CAN-2005-0839)

    Red Hat Enterprise Linux 4 users are advised to upgrade their kernels     to the packages associated with their machine architectures and     configurations as listed in this erratum.

    Please note that

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.

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

This security advisory has been rated as having important security
impact by the Red Hat Security Response Team.

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

The following security issues were fixed :

The Vicam USB driver did not use the copy_from_user function to access
userspace, crossing security boundaries. (CVE-2004-0075)

The ext3 and jfs code did not properly initialize journal descriptor
blocks. A privileged local user could read portions of kernel memory.
(CVE-2004-0177)

The terminal layer did not properly lock line discipline changes or
pending IO. An unprivileged local user could read portions of kernel
memory, or cause a denial of service (system crash). (CVE-2004-0814)

A race condition was discovered. Local users could use this flaw to
read the environment variables of another process that is still
spawning via /proc/.../cmdline. (CVE-2004-1058)

A flaw in the execve() syscall handling was discovered, allowing a
local user to read setuid ELF binaries that should otherwise be
protected by standard permissions. (CVE-2004-1073). Red Hat originally
reported this as being fixed by RHSA-2004:549, but the associated fix
was missing from that update.

Keith Owens reported a flaw in the Itanium unw_unwind_to_user()
function. A local user could use this flaw to cause a denial of
service (system crash) on the Itanium architecture. (CVE-2005-0135)

A missing Itanium syscall table entry could allow an unprivileged
local user to cause a denial of service (system crash) on the Itanium
architecture. (CVE-2005-0137)

A flaw affecting the OUTS instruction on the AMD64 and Intel EM64T
architectures was discovered. A local user could use this flaw to
access privileged IO ports. (CVE-2005-0204)

A flaw was discovered in the Linux PPP driver. On systems allowing
remote users to connect to a server using ppp, a remote client could
cause a denial of service (system crash). (CVE-2005-0384)

A flaw in the Red Hat backport of NPTL to Red Hat Enterprise Linux 3
was discovered that left a pointer to a freed tty structure. A local
user could potentially use this flaw to cause a denial of service
(system crash) or possibly gain read or write access to ttys that
should normally be prevented. (CVE-2005-0403)

A flaw in fragment queuing was discovered affecting the netfilter
subsystem. On systems configured to filter or process network packets
(for example those configured to do firewalling), a remote attacker
could send a carefully crafted set of fragmented packets to a machine
and cause a denial of service (system crash). In order to sucessfully
exploit this flaw, the attacker would need to know (or guess) some
aspects of the firewall ruleset in place on the target system to be
able to craft the right fragmented packets. (CVE-2005-0449)

Missing validation of an epoll_wait() system call parameter could
allow a local user to cause a denial of service (system crash) on the
IBM S/390 and zSeries architectures. (CVE-2005-0736)

A flaw when freeing a pointer in load_elf_library was discovered. A
local user could potentially use this flaw to cause a denial of
service (system crash). (CVE-2005-0749)

A flaw was discovered in the bluetooth driver system. On system where
the bluetooth modules are loaded, a local user could use this flaw to
gain elevated (root) privileges. (CVE-2005-0750)

In addition to the security issues listed above, there was an
important fix made to the handling of the msync() system call for a
particular case in which the call could return without queuing
modified mmap()'ed data for file system update. (BZ 147969)

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

Red Hat Enterprise Linux 3 users are advised to upgrade their kernels
to the packages associated with their machine
architectures/configurations

Please note that the fix for CVE-2005-0449 required changing the
external symbol linkages (kernel module ABI) for the ip_defrag() and
ip_ct_gather_frags() functions. Any third-party module using either of
these would also need to be fixed.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2005-366.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2005-293.

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
21928	CentOS 3 / 4 : kernel (CESA-2005:366)	Nessus	CentOS Local Security Checks	high
21923	CentOS 3 : kernel (CESA-2005:293)	Nessus	CentOS Local Security Checks	high
18128	RHEL 3 : kernel (RHSA-2005:293)	Nessus	Red Hat Local Security Checks	high
18095	RHEL 4 : kernel (RHSA-2005:366)	Nessus	Red Hat Local Security Checks	high
801608	Red Hat 2005-293 Security Check	Log Correlation Engine	Generic	high
801406	CentOS RHSA-2005-366 Security Check	Log Correlation Engine	Generic	high
801398	CentOS RHSA-2005-293 Security Check	Log Correlation Engine	Generic	high

Detections

Analytics

CVE-2005-0135

medium

Tenable Plugins

critical

critical

critical

critical

high

high

high

high

high

high

high