Information disclosure in Linux kernel - CVE-2011-2909

Vulnerability identifier: #VU42029

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2011-2909

CWE-ID: CWE-200

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The do_devinfo_ioctl function in drivers/staging/comedi/comedi_fops.c in the Linux kernel before 3.1 allows local users to obtain sensitive information from kernel memory via a copy of a short string.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-image-2.6.32-318-ec2 (Ubuntu package)
linux-lts-backport-maverick (Ubuntu package)
linux-lts-backport-natty (Ubuntu package)

Install update from vendor's website.

linux (Ubuntu package) - addressed in versions 2.6.32-34.77, 2.6.35-30.61, 2.6.38-13.52
linux-image-2.6.32-318-ec2 (Ubuntu package) - update to 2.6.32-318.38
linux-lts-backport-maverick (Ubuntu package) - update to 2.6.35-30.61~lucid1
linux-lts-backport-natty (Ubuntu package) - update to 2.6.38-13.52~lucid1

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=819cbb120eaec7e014e5abd029260db1ca8c5735
• http://www.openwall.com/lists/oss-security/2011/08/12/1
• https://github.com/torvalds/linux/commit/819cbb120eaec7e014e5abd029260db1ca8c5735
• https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.1.bz2

• Information disclosure in Linux kernel
• Ubuntu update for linux-ec2
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux-lts-backport-maverick
• Ubuntu update for linux-lts-backport-natty
• Ubuntu update for linux