Input validation error in Linux kernel - CVE-2011-0521

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Main Vulnerability Database Vulnerabilities #VU45387

Input validation error in Linux kernel - CVE-2011-0521

Published: February 3, 2011 / Updated: August 11, 2020


Vulnerability identifier: #VU45387
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-0521
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 execute arbitrary code.

The dvb_ca_ioctl function in drivers/media/dvb/ttpci/av7110_ca.c in the Linux kernel before 2.6.38-rc2 does not check the sign of a certain integer field, which allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact via a negative value.


Affected software

Linux kernel
Ubuntu
linux-source-2.6.15 (Ubuntu package)
linux (Ubuntu package)
linux-lts-backport-maverick (Ubuntu package)

How to mitigate CVE-2011-0521

Install update from vendor's website.

linux-source-2.6.15 (Ubuntu package) - update to 2.6.15-57.97
linux (Ubuntu package) - addressed in versions 2.6.24-29.89, 2.6.32-32.62, 2.6.35-30.54
linux-lts-backport-maverick (Ubuntu package) - update to 2.6.35-30.56~lucid1

External References

Related Security Bulletins