Qemu 1.0 mkstemp symlink

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$0-$5k0.00

A vulnerability has been found in Qemu 1.0 (Virtualization Software) and classified as problematic. Affected by this vulnerability is the function mkstemp. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The bdrv_open function in Qemu 1.0 does not properly handle the failure of the mkstemp function, when in snapshot node, which allows local users to overwrite or read arbitrary files via a symlink attack on an unspecified temporary file.

The weakness was released 08/07/2012 by Vincent Danen (Website). The advisory is shared at ubuntu.com. This vulnerability is known as CVE-2012-2652 since 05/14/2012. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/07/2021).

The vulnerability scanner Nessus provides a plugin with the ID 74666 (openSUSE Security Update : kvm (openSUSE-SU-2012:0832-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks.

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 (75943) and Tenable (74666).

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.9
VulDB Temp Score: 5.9
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: Symlink
CWE: CWE-61 / CWE-59
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74666
Nessus Name: openSUSE Security Update : kvm (openSUSE-SU-2012:0832-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: eba25057b9a5e19d10ace2bc7716667a31297169

Timelineinfo

05/14/2012 🔍
05/24/2012 +10 days 🔍
07/08/2012 +45 days 🔍
08/02/2012 +25 days 🔍
08/07/2012 +5 days 🔍
08/07/2012 +0 days 🔍
08/20/2012 +13 days 🔍
06/13/2014 +662 days 🔍
03/23/2015 +283 days 🔍
12/07/2021 +2451 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-1522-1
Researcher: Vincent Danen
Status: Not defined
Confirmation: 🔍

CVE: CVE-2012-2652 (🔍)
OVAL: 🔍

X-Force: 75943
Vulnerability Center: 35935 - Qemu 1.0 Allows to Overwrite or Read Arbitrary Files via a Symlink Attack, Medium
SecurityFocus: 53725 - QEMU CVE-2012-2652 Insecure Temporary File Creation Vulnerability
Secunia: 50132 - Ubuntu update for qemu-kvm, Less Critical

Entryinfo

Created: 03/23/2015 04:50 PM
Updated: 12/07/2021 11:20 AM
Changes: 03/23/2015 04:50 PM (60), 04/16/2017 10:34 AM (14), 12/07/2021 11:13 AM (5), 12/07/2021 11:20 AM (1)
Complete: 🔍

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