USN-2981-1: libarchive vulnerabilities

17 May 2016

libarchive vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.04 LTS
  • Ubuntu 15.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

libarchive could be made to crash or run programs if it opened a specially crafted file.

Software Description

  • libarchive - Library to read/write archive files

Details

It was discovered that libarchive incorrectly handled certain entry-size values in ZIP archives. A remote attacker could use this issue to cause libarchive to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-1541)

It was discovered that libarchive incorrectly handled memory when processing certain tar files. A remote attacker could use this issue to cause libarchive to crash, resulting in a denial of service. (CVE number pending)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04 LTS
libarchive13 - 3.1.2-11ubuntu0.16.04.1
Ubuntu 15.10
libarchive13 - 3.1.2-11ubuntu0.15.10.1
Ubuntu 14.04 LTS
libarchive13 - 3.1.2-7ubuntu2.2
Ubuntu 12.04 LTS
libarchive12 - 3.0.3-6ubuntu1.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References