RHSA-2005:551-01 Important: kernel security update
Posted on: 08/25/2005 07:52 AM
A new update is available for Red Hat Enterprise Linux. Here the announcement:
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Red Hat Security Advisory
Synopsis: Important: kernel security update
Advisory ID: RHSA-2005:551-01
Advisory URL: https://rhn.redhat.com/errata/RHSA-2005-551.html
Issue date: 2005-08-25
Updated on: 2005-08-25
Product: Red Hat Enterprise Linux
CVE Names: CAN-2005-0504 CAN-2005-0749 CAN-2005-1263 CAN-2005-1768 CAN-2005-1761 CAN-2004-1056
Updated kernel packages are now available to correct security issues and
bugs for Red Hat Enterprise Linux version 2.1 (Itanium).
This update has been rated as having important security impact by the
Red Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
3. Problem description:
The Linux kernel handles the basic functions of the operating system.
This is a kernel maintenance update to Red Hat Enterprise Linux 2.1.
The following security issues are corrected:
A flaw between execve() syscall handling and core dumping of ELF-format
executables allowed local unprivileged users to cause a denial of
service (system crash) or possibly gain privileges. The Common
Vulnerabilities and Exposures project has assigned the name CAN-2005-1263
to this issue.
A flaw in ptrace for Itanium architectures was discovered. A local user
could use this flaw to cause a denial of service (crash) or possibly gain
A race condition in the ia32 compatibility code for the execve system call
was discovered. A local user could use this flaw to cause a denial of
service (kernel panic) or possibly gain privileges. (CAN-2005-1768)
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).
The Direct Rendering Manager (DRM) driver did not properly check the DMA
lock, which could allow remote attackers or local users to cause a denial
of service (X Server crash) or possibly modify the video output.
A flaw in the moxa serial driver could allow a local user to perform
privileged operations such as replacing the firmware. (CAN-2005-0504)
The following bug fixes were also made:
- - "busy inodes after unmount" error on NFS volumes
- - Establish 64-bit limits even for 32-bit threads
- - Fix a race condition in __get_lease
- - Fix error in IDE disk accounting. This last fix causes IO accounting
to occur only on READ and WRITE operations. This fixes several bugs
in various accounting and statistic utilities.
- - Fix kswapd/dquot deadlock bug
- - Fix loop control bug in do_shmem_file_read
All Red Hat Enterprise Linux 2.1 Itanium users are advised to upgrade their
kernels to the packages associated with their machine configurations as
listed in this erratum.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
This update is available via Red Hat Network. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:
This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.
5. Bug IDs fixed (http://bugzilla.redhat.com/):
139775 - Filesystem quota GFP_KERNEL deadlock kswapd on dqio_sem.
144389 - CAN-2004-1056 insufficient locking checks in DRM code
144533 - random poolsize sysctl handler integer overflow
146104 - CAN-2005-0504 moxa CAP_SYS_RAWIO missing (ipf)
151230 - System hangs with kernel patch e.52 while dce install/run
152413 - CAN-2005-0749 load_elf_library possible DoS (ipf)
157453 - CAN-2005-1263 Linux kernel ELF core dump privilege elevation (ipf)
159824 - CAN-2005-1761 local user can use ptrace to crash system
160200 - CAN-2005-1768 64bit execve() race leads to buffer overflow
160562 - Race condition in __get_lease()
165950 - Unexpected error: VFS: Busy inodes after unmount. Self-destruct in 5 seconds.
6. RPMs required:
Red Hat Enterprise Linux AS (Advanced Server) version 2.1:
Red Hat Linux Advanced Workstation 2.1:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is lt;firstname.lastname@example.org;. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2005 Red Hat, Inc.
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