Microsoft Security Essentials Antimalware Engine TAR File Parser access control

Summaryinfo

A vulnerability was found in Microsoft Security Essentials Antimalware Engine. It has been classified as critical. This affects an unknown part of the component TAR File Parser. The manipulation leads to access control. This vulnerability is traded as CVE-2012-1420. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in Microsoft Security Essentials Antimalware Engine (Anti-Malware Software) (unknown version) and classified as critical. This issue affects an unknown code block of the component TAR File Parser. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is integrity. The summary by CVE is:

The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.2.11.5, F-Prot Antivirus 4.6.2.117, Fortinet Antivirus 4.2.254.0, K7 AntiVirus 9.77.3565, Kaspersky Anti-Virus 7.0.0.125, Antimalware Engine 1.1.6402.0 in Microsoft Security Essentials 2.0, NOD32 Antivirus 5795, Norman Antivirus 6.06.12, Panda Antivirus 10.0.2.7, and Rising Antivirus 22.83.00.03 allows remote attackers to bypass malware detection via a POSIX TAR file with an initial \7fELF character sequence. NOTE: this may later be SPLIT into multiple CVEs if additional information is published showing that the error occurred independently in different TAR parser implementations.

The weakness was shared 03/19/2012 by Suman Jana and Vitaly Shmatikov as confirmed mailinglist post (Bugtraq). It is possible to read the advisory at seclists.org. The vendor was not involved in the public release. The identification of this vulnerability is CVE-2012-1420 since 02/29/2012. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

A public exploit has been developed by Suman Jana / Vitaly Shmatikov and been published immediately after the advisory. The exploit is available at seclists.org. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

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 OSVDB (80402†) and SecurityTracker (ID 1026840†). The entries VDB-4914, VDB-4915, VDB-4916 and VDB-4917 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Anti-Malware Software

Vendor

• Microsoft

Name

• Security Essentials Antimalware Engine

License

• commercial

Website

• Vendor: https://www.microsoft.com/

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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