Summaryinfo

A vulnerability classified as critical was found in Avast! Antivirus. Impacted is an unknown function of the component ZIP Archive Handler. Such manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2015-5662. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Avast! Antivirus (Anti-Malware Software) and classified as critical. Affected by this issue is an unknown function of the component ZIP Archive Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Directory traversal vulnerability in Avast before 150918-0 allows remote attackers to delete or write to arbitrary files via a crafted entry in a ZIP archive.

The weakness was disclosed 10/18/2015 (Website). The advisory is shared for download at jvndb.jvn.jp. This vulnerability is handled as CVE-2015-5662 since 07/24/2015. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability scanner Nessus provides a plugin with the ID 87776 (Avast Antivirus Path Traversal Vulnerability), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows.

Upgrading to version 150918-0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (87776). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Anti-Malware Software

Vendor

• Avast!

Name

• Antivirus

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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