CVE-2009-4141
Use-after-free vulnerability in the fasync_helper function in fs/fcntl.c in the Linux kernel before 2.6.33-rc4-git1 allows local users to gain privileges via vectors that include enabling O_ASYNC (aka FASYNC or FIOASYNC) on a locked file, and then…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.98%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Use-after-free vulnerability in the fasync_helper function in fs/fcntl.c in the Linux kernel before 2.6.33-rc4-git1 allows local users to gain privileges via vectors that include enabling O_ASYNC (aka FASYNC or FIOASYNC) on a locked file, and then closing this file.
- CVSS 2.0
- 7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
- EPSS
- 0.98% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://archives.neohapsis.com/archives/fulldisclosure/2010-01/0252.htmlExploit
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53281b6d34d44308372d16acb7fb5327609f68b6
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00002.html
- http://lock.cmpxchg8b.com/5ebe2294ecd0e0f08eab7690d2a6ee69/create_elf_tables.cExploit
- http://secunia.com/advisories/38199Vendor Advisory
- http://secunia.com/advisories/39033
- http://support.avaya.com/css/P8/documents/100073666
- http://twitter.com/taviso/statuses/7744108017Patch
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.33-rc4-git1.bz2Patch
- http://www.redhat.com/support/errata/RHSA-2010-0161.html
- http://www.securityfocus.com/bid/37806
- https://bugzilla.redhat.com/show_bug.cgi?id=547906
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7054
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9201
- https://rhn.redhat.com/errata/RHSA-2010-0046.html
- https://rhn.redhat.com/errata/RHSA-2010-0095.html
- http://archives.neohapsis.com/archives/fulldisclosure/2010-01/0252.htmlExploit
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53281b6d34d44308372d16acb7fb5327609f68b6
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00002.html
- http://lock.cmpxchg8b.com/5ebe2294ecd0e0f08eab7690d2a6ee69/create_elf_tables.cExploit
- http://secunia.com/advisories/38199Vendor Advisory
- http://secunia.com/advisories/39033
- http://support.avaya.com/css/P8/documents/100073666
- http://twitter.com/taviso/statuses/7744108017Patch
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.33-rc4-git1.bz2Patch
- http://www.redhat.com/support/errata/RHSA-2010-0161.html
- http://www.securityfocus.com/bid/37806
- https://bugzilla.redhat.com/show_bug.cgi?id=547906
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7054
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9201
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.