Citrix Xen 4.0.0/4.1.0 Qemu Emulator input validation

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.
8.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Citrix Xen 4.0.0/4.1.0. Affected by this vulnerability is an unknown functionality of the component Qemu Emulator. Performing a manipulation results in input validation. This vulnerability is known as CVE-2012-3515. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Citrix Xen 4.0.0/4.1.0 (Connectivity Software). This affects an unknown functionality of the component Qemu Emulator. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model s address space."

The weakness was published 09/05/2012 as 2012-09/msg00003 as not defined posting (Maillist). The advisory is shared at lists.xen.org. The public release has been coordinated with Citrix. This vulnerability is uniquely identified as CVE-2012-3515 since 06/14/2012. The exploitability is told to be difficult. An attack has to be approached locally. The successful exploitation needs a authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 68613 (Oracle Linux 5 : kvm (ELSA-2012-1235)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370049 (Citrix XenServer Security Update (CTX134708)).

Applying the patch xsa17 is able to eliminate this problem. The bugfix is ready for download at lists.xen.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (68613), SecurityFocus (BID 55413†), OSVDB (85196†) and Secunia (SA50461†). Similar entries are available at VDB-5876, VDB-5927, VDB-6107 and VDB-6108. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 68613
Nessus Name: Oracle Linux 5 : kvm (ELSA-2012-1235)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 72171
OpenVAS Name: Debian Security Advisory DSA 2542-1 (qemu-kvm)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: xsa17

Timelineinfo

06/14/2012 🔍
09/05/2012 +83 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/06/2012 +1 days 🔍
09/07/2012 +1 days 🔍
09/10/2012 +3 days 🔍
11/23/2012 +74 days 🔍
07/12/2013 +231 days 🔍
04/29/2019 +2117 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: 2012-09/msg00003
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3515 (🔍)
GCVE (CVE): GCVE-0-2012-3515
GCVE (VulDB): GCVE-100-6105

OVAL: 🔍

SecurityFocus: 55413 - Xen CVE-2012-3515 Local Privilege Escalation Vulnerability
Secunia: 50461 - Qemu Console VT1000 Sequence Handling Privilege Escalation Vulnerability, Less Critical
OSVDB: 85196

See also: 🔍

Entryinfo

Created: 09/10/2012 10:30
Updated: 04/29/2019 09:59
Changes: 09/10/2012 10:30 (77), 04/29/2019 09:59 (5)
Complete: 🔍
Committer: olku
Cache ID: 216:749:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!