A vulnerability was found in Cisco ClamAV up to 0.100.1 (Anti-Malware Software). It has been declared as problematic. Affected by this vulnerability is the function unmew11 of the file libclamav/mew.c of the component MEW Unpacker. The manipulation as part of a EXE File leads to a out-of-bounds vulnerability (Memory). The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

A vulnerability in ClamAV versions prior to 0.100.2 could allow an attacker to cause a denial of service (DoS) condition. The vulnerability is due to an error related to the MEW unpacker within the "unmew11()" function (libclamav/mew.c), which can be exploited to trigger an invalid read memory access via a specially crafted EXE file.

The bug was discovered 10/03/2018. The weakness was presented 10/15/2018 (Website). It is possible to read the advisory at secuniaresearch.flexerasoftware.com. This vulnerability is known as CVE-2018-15378 since 08/17/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118082 (Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : clamav vulnerability (USN-3789-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171684 (SUSE Enterprise Linux Security Update for clamav (SUSE-SU-2018:3441-1)).

Upgrading to version 0.100.2 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118082). See 122307, 122308 and 122309 for similar entries.

Productinfo

Type

• Anti-Malware Software

Vendor

• Cisco

Name

• ClamAV

Version

• 0.100.0
• 0.100.1

License

• free

Support

• end of life (old version)

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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