Linux Foundation Xen qemu-ga qga-fsfreeze-hook.log access control

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.
7.3$0-$5k0.00

A vulnerability has been found in Linux Foundation Xen (Virtualization Software) (version unknown) and classified as critical. Affected by this vulnerability is an unknown function of the file qemu-ga.log/qga.state/qga-fsfreeze-hook.log of the component qemu-ga. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The qemu guest agent in Qemu 1.4.1 and earlier, as used by Xen, when started in daemon mode, uses weak permissions for certain files, which allows local users to read and write to these files.

The weakness was disclosed 05/06/2013 by Laszlo Ersek with Red Hat as confirmed mailinglist post (oss-sec). The advisory is shared at seclists.org. This vulnerability is known as CVE-2013-2007 since 02/19/2013. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

After immediately, there has been an exploit disclosed. It is possible to download the exploit at seclists.org. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. By approaching the search of inurl:qemu-ga.log/qga.state/qga-fsfreeze-hook.log it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 68831 (Oracle Linux 6 : qemu-kvm (ELSA-2013-0896)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166636 (SUSE Enterprise Linux Security Update for Xen (SUSE-SU-2013:1923-1)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.qemu.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (84047) and Tenable (68831). The entries 11257 and 64149 are pretty similar.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.4
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 68831
Nessus Name: Oracle Linux 6 : qemu-kvm (ELSA-2013-0896)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881744
OpenVAS Name: CentOS Update for qemu-guest-agent CESA-2013:0896 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: git.qemu.org

Timelineinfo

02/19/2013 🔍
04/24/2013 +64 days 🔍
05/06/2013 +12 days 🔍
05/06/2013 +0 days 🔍
05/06/2013 +0 days 🔍
05/06/2013 +0 days 🔍
05/07/2013 +1 days 🔍
05/08/2013 +1 days 🔍
05/21/2013 +13 days 🔍
06/09/2013 +19 days 🔍
07/12/2013 +33 days 🔍
05/10/2021 +2859 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: seclists.org
Researcher: Laszlo Ersek
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-2007 (🔍)
OVAL: 🔍

X-Force: 84047 - Qemu privilege escalation, Low Risk
SecurityTracker: 1028521
Vulnerability Center: 39907 - Qemu Through 1.4.1 Local File Read and Write When Started in Daemon Mode, Medium
SecurityFocus: 59675 - QEMU Guest Agent CVE-2013-2007 Insecure File Permissions Vulnerability
Secunia: 53325 - Qemu Guest Agent Insecure Permissions Weakness, Not Critical
OSVDB: 93032

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/08/2013 17:08
Updated: 05/10/2021 14:35
Changes: 05/08/2013 17:08 (88), 05/01/2017 12:04 (4), 05/10/2021 14:32 (3), 05/10/2021 14:35 (1)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!