Race condition in Linux kernel - CVE-2009-2691
Published: August 14, 2009 / Updated: August 17, 2017
Vulnerability identifier: #VU91499
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2009-2691
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2009-2691
Install update from vendor's website.
Sources
- 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