USN-2651-1: GNU patch vulnerabilities

22 June 2015

patch vulnerabilities

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in GNU patch.

Software Description

  • patch - Apply a diff file to an original

Details

Jakub Wilk discovered that GNU patch did not correctly handle file paths in patch files. An attacker could specially craft a patch file that could overwrite arbitrary files with the privileges of the user invoking the program. This issue only affected Ubuntu 12.04 LTS. (CVE-2010-4651)

László Böszörményi discovered that GNU patch did not correctly handle some patch files. An attacker could specially craft a patch file that could cause a denial of service. (CVE-2014-9637)

Jakub Wilk discovered that GNU patch did not correctly handle symbolic links in git style patch files. An attacker could specially craft a patch file that could overwrite arbitrary files with the privileges of the user invoking the program. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-1196)

Jakub Wilk discovered that GNU patch did not correctly handle file renames in git style patch files. An attacker could specially craft a patch file that could overwrite arbitrary files with the privileges of the user invoking the program. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-1395)

Jakub Wilk discovered the fix for CVE-2015-1196 was incomplete for GNU patch. An attacker could specially craft a patch file that could overwrite arbitrary files with the privileges of the user invoking the program. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-1396)

Update instructions

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

Ubuntu 14.10
patch - 2.7.1-5ubuntu0.3
Ubuntu 14.04 LTS
patch - 2.7.1-4ubuntu2.3
Ubuntu 12.04 LTS
patch - 2.6.1-3ubuntu0.1

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