CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.1	$0-$5k	0.00

A vulnerability was found in Linux Kernel 2.6.16.9 (Operating System) and classified as critical. Affected by this issue is the function keyctl_session_to_parent. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The keyctl_session_to_parent function in security/keys/keyctl.c in the Linux kernel 2.6.35.4 and earlier expects that a certain parent session keyring exists, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a KEYCTL_SESSION_TO_PARENT argument to the keyctl function.

The issue has been introduced in 03/20/2006. The weakness was shared 09/08/2010 by Tavis Ormandy as Bug 627440 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2010-2960. The exploitation is known to be easy. 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 09/24/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 1633 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 49161 (Fedora 13 : kernel-2.6.34.6-54.fc13 (2010-14235)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165615 (SUSE Enterprise Linux Security Update Linux Kernel (SUSE-SA:2010:050)).

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 (61557), Vulnerability Center (SBV-27252) and Tenable (49161). The entries 54876, 54874 and 54794 are related to this item.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.4
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 49161
Nessus Name: Fedora 13 : kernel-2.6.34.6-54.fc13 (2010-14235)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 862387
OpenVAS Name: Fedora Update for kernel FEDORA-2010-14235
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 🔍
08/04/2010 +1597 days 🔍
09/02/2010 +29 days 🔍
09/08/2010 +6 days 🔍
09/08/2010 +0 days 🔍
09/08/2010 +0 days 🔍
09/21/2010 +13 days 🔍
03/19/2015 +1640 days 🔍
09/24/2021 +2381 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 627440
Researcher: Tavis Ormandy
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-2960 (🔍)
OVAL: 🔍

X-Force: 61557
Vulnerability Center: 27252 - Linux Kernel 2.6.35.4 and Prior Local DoS Vulnerability via a KEYCTL_SESSION_TO_PARENT Argument, Low
SecurityFocus: 42932 - Linux Kernel 'keyctl_session_to_parent()' Null Pointer Dereference Denial of Service Vulnerability
Secunia: 41263

See also: 🔍

Entryinfo

Created: 03/19/2015 02:37 PM
Updated: 09/24/2021 03:00 PM
Changes: 03/19/2015 02:37 PM (62), 03/06/2017 10:59 AM (12), 09/24/2021 02:54 PM (5), 09/24/2021 02:58 PM (11), 09/24/2021 03:00 PM (1)
Complete: 🔍

Discussion

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