USN-1991-1: GNU C Library vulnerabilities

21 October 2013

eglibc vulnerabilities

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

  • Ubuntu 13.04
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in the GNU C Library.

Software Description

  • eglibc - GNU C Library

Details

It was discovered that the GNU C Library incorrectly handled the strcoll() function. An attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2012-4412, CVE-2012-4424)

It was discovered that the GNU C Library incorrectly handled multibyte characters in the regular expression matcher. An attacker could use this issue to cause a denial of service. (CVE-2013-0242)

It was discovered that the GNU C Library incorrectly handled large numbers of domain conversion results in the getaddrinfo() function. An attacker could use this issue to cause a denial of service. (CVE-2013-1914)

It was discovered that the GNU C Library readdir_r() function incorrectly handled crafted NTFS or CIFS images. An attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2013-4237)

It was discovered that the GNU C Library incorrectly handled memory allocation. An attacker could use this issue to cause a denial of service. (CVE-2013-4332)

Update instructions

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

Ubuntu 13.04
libc6 - 2.17-0ubuntu5.1
Ubuntu 12.10
libc6 - 2.15-0ubuntu20.2
Ubuntu 12.04 LTS
libc6 - 2.15-0ubuntu10.5
Ubuntu 10.04 LTS
libc6 - 2.11.1-0ubuntu7.13

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

After a standard system update you need to reboot your computer to make all the necessary changes.

References