Buffer overflow in Linux kernel - CVE-2011-1776
Published: September 6, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU44752
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2011-1776
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local non-authenticated attacker to #BASIC_IMPACT#.
The is_gpt_valid function in fs/partitions/efi.c in the Linux kernel before 2.6.39 does not check the size of an Extensible Firmware Interface (EFI) GUID Partition Table (GPT) entry, which allows physically proximate attackers to cause a denial of service (heap-based buffer overflow and OOPS) or obtain sensitive information from kernel heap memory by connecting a crafted GPT storage device, a different vulnerability than CVE-2011-1577.
How to mitigate CVE-2011-1776
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fa039d5f6b126fbd65eefa05db2f67e44df8f121
- http://openwall.com/lists/oss-security/2011/05/10/4
- http://rhn.redhat.com/errata/RHSA-2011-0927.html
- http://securityreason.com/securityalert/8369
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://www.pre-cert.de/advisories/PRE-SA-2011-04.txt
- http://www.securityfocus.com/bid/47796
- https://bugzilla.redhat.com/show_bug.cgi?id=703026