Fortinet Antivirus up to 5795 TAR File Parser access control

Summaryinfo

A vulnerability was found in Fortinet Antivirus up to 5795. It has been rated as critical. This issue affects some unknown processing of the component TAR File Parser. This manipulation causes access control. This vulnerability is handled as CVE-2012-1420. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in Fortinet Antivirus up to 5795 (Anti-Malware Software). It has been declared as critical. Affected by this vulnerability is an unknown function of the component TAR File Parser. 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 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 released 03/19/2012 by Suman Jana and Vitaly Shmatikov as confirmed mailinglist post (Bugtraq). The advisory is shared at seclists.org. The public release happened without involvement of Fortinet. This vulnerability is known as CVE-2012-1420 since 02/29/2012. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed by Suman Jana / Vitaly Shmatikov and been published immediately after the advisory. 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 $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 (80405†) and SecurityTracker (ID 1026840†). Entries connected to this vulnerability are available at VDB-4914, VDB-4915, VDB-4916 and VDB-4917. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Anti-Malware Software

Vendor

• Fortinet

Name

• Antivirus

Version

• 4.2.254.0
• 4.6.2.117
• 5.2.11.5
• 6.06.12
• 9.77.3565
• 10.0.2.7
• 22.83.00.03
• 5795

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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

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