Division by zero in Linux kernel - CVE-2009-4307
Published: December 13, 2009 / Updated: September 19, 2017
Vulnerability identifier: #VU91385
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2009-4307
CWE-ID: CWE-369
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a division by zero error within the ext4_fill_flex_info() function in fs/ext4/super.c. A remote non-authenticated attacker can perform a denial of service (DoS) attack.
How to mitigate CVE-2009-4307
Install update from vendor's website.
Sources
- http://bugzilla.kernel.org/show_bug.cgi?id=14287
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=503358ae01b70ce6909d19dd01287093f6b6271c
- 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/37658
- 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.log
- 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%3Adef%3A9874