Linux Kernel 2.6.0 XFRM xfrm_user_policy memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

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. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Array index overflow in the xfrm_sk_policy_insert function in xfrm_user.c in Linux kernel 2.6 allows local users to cause a denial of service (oops or deadlock) and possibly execute arbitrary code via a p->dir value that is larger than XFRM_POLICY_OUT, which is used as an index in the sock->sk_policy array.

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 mail-archive.com. 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 l. 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 mail-archive.com. 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 X-Force (21710) and Tenable (21943). Entries connected to this vulnerability are available at 1234, 1288, 1289 and 1290.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

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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VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

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

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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Patch: mail-archive.com

Timelineinfo

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 🔍
09/05/2019 +4810 days 🔍

Sourcesinfo

Vendor: kernel.org

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

CVE: CVE-2005-2456 (🔍)
OVAL: 🔍

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
SecurityFocus: 14477 - Linux Kernel XFRM Array Index Buffer Overflow Vulnerability
Secunia: 16500 - Ubuntu update for kernel, Less Critical
OSVDB: 18555 - Linux Kernel xfrm Array Indexing Overflow
Vupen: ADV-2005-1878

See also: 🔍

Entryinfo

Created: 08/08/2005 13:11
Updated: 09/05/2019 13:32
Changes: 08/08/2005 13:11 (98), 09/05/2019 13:32 (2)
Complete: 🔍

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