SB2009081402 - Race condition in Linux kernel proc
Published: August 14, 2009
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2009-2691)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a race condition within the m_start() function in fs/proc/task_nommu.c, within the m_start() function in fs/proc/task_mmu.c, within the check_mem_permission() and mm_for_maps() functions in fs/proc/base.c. A local user can gain access to sensitive information.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=00f89d218523b9bf6b522349c039d5ac80aa536d
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=13f0feafa6b8aead57a2a328e2fca6a5828bf286
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=704b836cbf19e885f8366bccb2e4b0474346c02d
- http://lkml.org/lkml/2009/6/23/652
- http://lkml.org/lkml/2009/6/23/653
- http://marc.info/?l=linux-kernel&m=124718946021193
- http://marc.info/?l=linux-kernel&m=124718949821250
- http://secunia.com/advisories/36265
- http://secunia.com/advisories/36501
- http://www.debian.org/security/2010/dsa-2005
- http://www.openwall.com/lists/oss-security/2009/08/11/1
- http://www.securityfocus.com/bid/36019
- http://www.vupen.com/english/advisories/2009/2246
- https://bugzilla.redhat.com/show_bug.cgi?id=516171
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52401
- https://rhn.redhat.com/errata/RHSA-2009-1540.html
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html