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Vulnerability Details : CVE-2011-1776

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.
Publish Date : 2011-09-06 Last Update Date : 2020-07-27
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- CVSS Scores & Vulnerability Types

CVSS Score
5.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceOverflowObtain Information
CWE ID 119

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat low
4.9
AV:L/AC:L/Au:N/C:N/I:N/A:C 2011-05-09 2011-05-06
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2011-1776 oval:org.opensuse.security:def:20111776 unix
DEPRECATED: ELSA-2011-1189 -- kernel security, bug fix, and enhancement update (important) oval:org.mitre.oval:def:28043 unix
DEPRECATED: ELSA-2011-0927 -- kernel security and bug fix update (important) oval:org.mitre.oval:def:27865 unix
DSA-2240-1 linux-2.6 -- privilege escalation/denial of service/information leak oval:org.mitre.oval:def:13013 unix
DSA-2264-1 linux-2.6 -- privilege escalation/denial of service/information leak oval:org.mitre.oval:def:12997 unix
ELSA-2011:0927: kernel security and bug fix update (Important) oval:org.mitre.oval:def:23330 unix
ELSA-2011:1189: kernel security, bug fix, and enhancement update (Important) oval:org.mitre.oval:def:23636 unix
RHSA-2011:0927: kernel security and bug fix update (Important) oval:org.mitre.oval:def:21896 unix
RHSA-2011:0927: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20110927 unix
RHSA-2011:1189: kernel security, bug fix, and enhancement update (Important) oval:org.mitre.oval:def:22054 unix
RHSA-2011:1189: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20111189 unix
USN-1225-1 -- linux vulnerabilities oval:org.mitre.oval:def:21107 unix
USN-1228-1 -- linux-ti-omap4 vulnerabilities oval:org.mitre.oval:def:20812 unix
VMware ESXi and ESX updates to third party library and ESX Service Console oval:org.mitre.oval:def:20485 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2011-1776

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
2 OS Redhat Enterprise Linux Desktop 5.0 * * * Version Details Vulnerabilities
3 OS Redhat Enterprise Linux Server 5.0 * * * Version Details Vulnerabilities
4 OS Redhat Enterprise Linux Server Aus 5.6 * * * Version Details Vulnerabilities
5 OS Redhat Enterprise Linux Server Eus 5.6 * * * Version Details Vulnerabilities
6 OS Redhat Enterprise Linux Workstation 5.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1
Redhat Enterprise Linux Desktop 1
Redhat Enterprise Linux Server 1
Redhat Enterprise Linux Server Aus 1
Redhat Enterprise Linux Server Eus 1
Redhat Enterprise Linux Workstation 1

- References For CVE-2011-1776

http://securityreason.com/securityalert/8369
SREASON 8369
http://openwall.com/lists/oss-security/2011/05/10/4
MLIST [oss-security] 20110510 Re: CVE request: kernel: validate size of EFI GUID partition entries
http://www.pre-cert.de/advisories/PRE-SA-2011-04.txt
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fa039d5f6b126fbd65eefa05db2f67e44df8f121 CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=703026 CONFIRM
http://www.securityfocus.com/bid/47796
BID 47796 Linux Kernel EFI Partition Buffer Overflow Vulnerability Release Date:2012-09-21
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 CONFIRM
http://rhn.redhat.com/errata/RHSA-2011-0927.html
REDHAT RHSA-2011:0927

- Metasploit Modules Related To CVE-2011-1776

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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