Input validation error in Linux kernel - CVE-2011-1012
Published: March 2, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU45267
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-1012
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 a denial of service (DoS) attack.
The ldm_parse_vmdb function in fs/partitions/ldm.c in the Linux kernel before 2.6.38-rc6-git6 does not validate the VBLK size value in the VMDB structure in an LDM partition table, which allows local users to cause a denial of service (divide-by-zero error and OOPS) via a crafted partition table.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-backport-maverick (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-lts-backport-maverick (Ubuntu package)
How to mitigate CVE-2011-1012
Install update from vendor's website.
linux (Ubuntu package) - addressed in versions 2.6.24-29.90, 2.6.32-32.62, 2.6.35-30.54
linux-lts-backport-maverick (Ubuntu package) - update to 2.6.35-30.56~lucid1
linux-lts-backport-maverick (Ubuntu package) - update to 2.6.35-30.56~lucid1
External References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=294f6cf48666825d23c9372ef37631232746e40d
- http://openwall.com/lists/oss-security/2011/02/23/21
- http://openwall.com/lists/oss-security/2011/02/23/4
- http://securityreason.com/securityalert/8115
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.38-rc6-git6.log
- http://www.pre-cert.de/advisories/PRE-SA-2011-01.txt
- http://www.securityfocus.com/archive/1/516615/100/0/threaded
- http://www.securityfocus.com/bid/46512
- http://www.securitytracker.com/id?1025127
- http://www.spinics.net/lists/mm-commits/msg82429.html
- http://www.ubuntu.com/usn/USN-1146-1