Information disclosure in Linux kernel - CVE-2012-6547
Published: March 15, 2013 / Updated: August 11, 2020
Vulnerability identifier: #VU43001
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2012-6547
CWE-ID: CWE-200
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 gain access to sensitive information.
The __tun_chr_ioctl function in drivers/net/tun.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.
How to mitigate CVE-2012-6547
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a117dacde0288f3ec60b6e5bcedae8fa37ee0dfc
- http://rhn.redhat.com/errata/RHSA-2013-0744.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
- http://www.openwall.com/lists/oss-security/2013/03/05/13
- https://github.com/torvalds/linux/commit/a117dacde0288f3ec60b6e5bcedae8fa37ee0dfc
- https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2