Linux Kernel 2.6.0 XFRM xfrm_user_policy memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Linux Kernel 2.6.0 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function xfrm_user_policy of the component XFRM Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 08/05/2005. The weakness was released 08/05/2005 by Balazs Scheidler as RHSA-2005:514 (Website). The advisory is shared at This vulnerability is known as CVE-2005-2456 since 08/04/2005. The exploitation appears to be easy. The attack can only be done within the local network. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 21943 (CentOS 4 : kernel (CESA-2005:514)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117852 (CentOS Security Update for Kernel (CESA-2005:663)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 14477), X-Force (21710), Secunia (SA16500), Vulnerability Center (SBV-9615) and Tenable (21943). Entries connected to this vulnerability are available at 1234, 1288, 1289 and 1290.





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

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Nessus ID: 21943
Nessus Name: CentOS 4 : kernel (CESA-2005:514)
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OpenVAS ID: 56013
OpenVAS Name: Debian Security Advisory DSA 921-1 (kernel-source-2.4.27)
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Threat Intelligenceinfoedit

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Recommended: Upgrade
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08/04/2005 🔍
08/04/2005 +0 days 🔍
08/05/2005 +1 days 🔍
08/05/2005 +0 days 🔍
08/05/2005 +0 days 🔍
08/05/2005 +0 days 🔍
08/08/2005 +2 days 🔍
08/29/2005 +21 days 🔍
10/05/2005 +37 days 🔍
11/14/2005 +40 days 🔍
07/05/2006 +233 days 🔍
09/19/2016 +3729 days 🔍
09/05/2019 +1081 days 🔍



Advisory: RHSA-2005:514
Researcher: Balazs Scheidler
Status: Not defined
Confirmation: 🔍

CVE: CVE-2005-2456 (🔍)

SecurityFocus: 14477 - Linux Kernel XFRM Array Index Buffer Overflow Vulnerability
Secunia: 16500 - Ubuntu update for kernel, Less Critical
X-Force: 21710 - Linux kernel XFRM code denial of service, Medium Risk
Vulnerability Center: 9615 - Linux Kernel Local Privileges Escalation via Array Index Overflow in xfrm_user.c, High
OSVDB: 18555 - Linux Kernel xfrm Array Indexing Overflow
Vupen: ADV-2005-1878

See also: 🔍


Created: 08/08/2005 01:11 PM
Updated: 09/05/2019 01:32 PM
Changes: (2) vulnerability_discoverydate countermeasure_date
Complete: 🔍


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