SB2010011901 - Privilege escalation in Linux kernel fs
Published: January 19, 2010 Updated: June 5, 2024
Security Bulletin ID
SB2010011901
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2009-4141)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the fasync_helper() function in fs/fcntl.c. A local user can execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.
References
- http://lock.cmpxchg8b.com/5ebe2294ecd0e0f08eab7690d2a6ee69/create_elf_tables.c
- http://www.securityfocus.com/bid/37806
- http://twitter.com/taviso/statuses/7744108017
- http://secunia.com/advisories/38199
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.33-rc4-git1.bz2
- http://archives.neohapsis.com/archives/fulldisclosure/2010-01/0252.html
- https://bugzilla.redhat.com/show_bug.cgi?id=547906
- https://rhn.redhat.com/errata/RHSA-2010-0046.html
- https://rhn.redhat.com/errata/RHSA-2010-0095.html
- http://support.avaya.com/css/P8/documents/100073666
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00002.html
- http://www.redhat.com/support/errata/RHSA-2010-0161.html
- http://secunia.com/advisories/39033
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9201
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7054
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53281b6d34d44308372d16acb7fb5327609f68b6