Input validation error in Linux kernel - CVE-2011-2493
Published: June 13, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43999
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-2493
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The ext4_fill_super function in fs/ext4/super.c in the Linux kernel before 2.6.39 does not properly initialize a certain error-report data structure, which allows local users to cause a denial of service (OOPS) by attempting to mount a crafted ext4 filesystem.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-backport-natty (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-lts-backport-natty (Ubuntu package)
How to mitigate CVE-2011-2493
Install update from vendor's website.
linux (Ubuntu package) - update to 2.6.38-11.48
linux-lts-backport-natty (Ubuntu package) - update to 2.6.38-12.51~lucid1
linux-lts-backport-natty (Ubuntu package) - update to 2.6.38-12.51~lucid1
External References
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0449641130f5652b344ef6fa39fa019d7e94660a
- http://www.openwall.com/lists/oss-security/2011/06/24/4
- https://github.com/torvalds/linux/commit/0449641130f5652b344ef6fa39fa019d7e94660a