Vulnerability Note VU#862384

Overview

An attacker may be able to coerce a user into executing arbitrary code in the context of the current user by attempting to unzip a crafted zip file provided by the attacker.

Description

CWE-20: Improper Input Validation - CVE-2016-1541 A crafted zip file can provide an incorrect compressed size, which may allow an attacker to place arbitrary code on the heap and execute it in the context of the current user. The user must be coerced into unzipping the crafted zip file. The researcher has confirmed that version 3.1.2 is impacted. Previous versions may also be affected.

Impact

An attacker may be able coerce a user into unzipping a file that executes arbitrary code in the context of the current user.

Solution

Apply an update libarchive has released version 3.2.0 which addresses this problem. Affected users should update as soon as possible.

Vendor Information (Learn More)

Vendor	Status	Date Notified	Date Updated
libarchive	Affected	22 Feb 2016	02 May 2016

If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group	Score	Vector
Base	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P
Temporal	6.1	E:POC/RL:U/RC:C
Environmental	4.6	CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

• https://github.com/libarchive/libarchive/issues/656
• http://www.libarchive.org/

Credit

Thanks to Rock Stevens and Andrew Ruef for reporting this vulnerability.

This document was written by Garret Wassermann.

Other Information

• CVE IDs: CVE-2016-1541
• Date Public: 01 May 2016
• Date First Published: 02 May 2016
• Date Last Updated: 04 May 2016
• Document Revision: 39