Linux Kernel 2.6.16.9 parse_tag_11_packet memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.8$0-$5k0.00

A vulnerability was found in Linux Kernel 2.6.16.9 (Operating System). It has been rated as critical. Affected by this issue is the function parse_tag_11_packet. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Stack-based buffer overflow in the parse_tag_11_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before 2.6.30.4 allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving a crafted eCryptfs file, related to not ensuring that the key signature length in a Tag 11 packet is compatible with the key signature buffer size.

The issue has been introduced in 03/20/2006. The weakness was published 07/31/2009 (Website). The advisory is shared for download at vupen.com. This vulnerability is handled as CVE-2009-2406 since 07/09/2009. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/13/2021).

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1229 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 43773 (CentOS 5 : kernel (CESA-2009:1193)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165654 (SUSE Enterprise Linux Security Update Linux Kernel (SUSE-SA:2009:045)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (52125) and Tenable (43773). Similar entries are available at 46707, 44965, 49049 and 48854.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.3
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 43773
Nessus Name: CentOS 5 : kernel (CESA-2009:1193)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 64555
OpenVAS Name: Debian Security Advisory DSA 1844-1 (linux-2.6.24)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/20/2006 🔍
07/09/2009 +1207 days 🔍
07/28/2009 +19 days 🔍
07/28/2009 +0 days 🔍
07/29/2009 +1 days 🔍
07/29/2009 +0 days 🔍
07/31/2009 +2 days 🔍
07/31/2009 +0 days 🔍
08/05/2009 +5 days 🔍
03/18/2015 +2051 days 🔍
08/13/2021 +2340 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: vupen.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-2406 (🔍)
OVAL: 🔍

X-Force: 52125
SecurityTracker: 1022663 - Linux Kernel eCryptfs Stack Overflow Lets Local Users Deny Service and Potentially Gain Elevated Privileges
Vulnerability Center: 22989 - Linux Kernel < 2.6.30.4 Stack Based Buffer Overflow Remote Code Execution Vulnerability, Critical
SecurityFocus: 35851 - Linux Kernel eCryptfs 'parse_tag_11()' Remote Stack Buffer Overflow Vulnerability
Secunia: 35985 - Linux Kernel eCryptfs Two Vulnerabilities, Less Critical
Vupen: ADV-2009-2041

See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/13/2021 09:03
Changes: 03/18/2015 15:15 (64), 02/12/2017 12:57 (19), 08/13/2021 09:03 (3)
Complete: 🔍

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