Linux Kernel 3.3.3 access control

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Linux Kernel 3.3.3 (Operating System). Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is availability. CVE summarizes:

The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.

The weakness was disclosed 05/17/2012 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2012-2121 since 04/04/2012. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/01/2021). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 71203 (Ubuntu 10.04 LTS : linux vulnerabilities (USN-2036-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195877 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2036-1)).

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 (74931) and Tenable (71203). The entries 11159, 11160, 63763 and 63762 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.2
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71203
Nessus Name: Ubuntu 10.04 LTS : linux vulnerabilities (USN-2036-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892668
OpenVAS Name: Debian Security Advisory DSA 2668-1 (linux-2.6 - privilege escalation/denial of service/information leak
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: 🔍

Patch: github.com

Timelineinfo

04/04/2012 🔍
04/19/2012 +15 days 🔍
04/19/2012 +0 days 🔍
05/17/2012 +28 days 🔍
05/17/2012 +0 days 🔍
05/22/2012 +5 days 🔍
06/06/2012 +15 days 🔍
09/24/2012 +110 days 🔍
12/04/2013 +436 days 🔍
03/23/2015 +474 days 🔍
12/02/2021 +2445 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2036-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-2121 (🔍)
OVAL: 🔍

X-Force: 74931
SecurityTracker: 1027083 - Linux Kernel KVM Memory Slot Management Flaw Lets Local Guest Users Deny Service on the Guest Operating System
Vulnerability Center: 35269 - KVM Input / Output Memory Management Unit Memory Leak Vulnerability Allows Local DoS, Medium
SecurityFocus: 53162 - KVM CVE-2012-2121 Local Denial of Service Vulnerability
Secunia: 50732 - Ubuntu update for kernel, Less Critical

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/02/2021 00:21
Changes: 03/23/2015 16:50 (64), 04/13/2017 13:10 (17), 12/01/2021 23:57 (3), 12/02/2021 00:08 (1), 12/02/2021 00:21 (2)
Complete: 🔍

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