CVE-2011-1776

Impact:
Low
Public Date:
2011-05-06
IAVA:
2012-A-0020
Bugzilla:
703026: CVE-2011-1776 kernel: validate size of EFI GUID partition entries

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2011-1776 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue affects the versions of Linux kernel as shipped with Red Hat
Enterprise 4, 5, 6, and Red Hat Enterprise MRG. This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0927.html and https://rhn.redhat.com/errata/RHSA-2011-1189.html, and https://rhn.redhat.com/errata/RHSA-2011-1253.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.

CVSS v2 metrics

Base Score 4.9
Base Metrics AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (kernel) RHSA-2011:1189 2011-08-23
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2011:1253 2011-09-12
Red Hat Enterprise Linux 5 (kernel) RHSA-2011:0927 2011-07-15

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 1.3 realtime-kernel Will not fix

Acknowledgements

Red Hat would like to thank Timo Warns for reporting this issue.
Last Modified

CVE description copyright © 2017, The MITRE Corporation