Vulnerability Description
The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 2.6.32-git6 allows user-assisted remote attackers to cause a denial of service (divide-by-zero error and panic) via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 2.6.32 |
Related Weaknesses (CWE)
References
- http://bugzilla.kernel.org/show_bug.cgi?id=14287ExploitPatch
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00005.html
- http://lkml.org/lkml/2009/12/9/255
- http://secunia.com/advisories/37658Vendor Advisory
- http://secunia.com/advisories/38017
- http://secunia.com/advisories/38276
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.32-git6.logPatch
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:029
- http://www.redhat.com/support/errata/RHSA-2010-0380.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3
- http://bugzilla.kernel.org/show_bug.cgi?id=14287ExploitPatch
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
FAQ
What is CVE-2009-4307?
CVE-2009-4307 is a vulnerability with a CVSS score of 7.1 (HIGH). The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 2.6.32-git6 allows user-assisted remote attackers to cause a denial of service (divide-by-zero error and panic) via a mal...
How severe is CVE-2009-4307?
CVE-2009-4307 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2009-4307?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.