USN-3323-1: GNU C Library vulnerability

19 June 2017

eglibc, glibc vulnerability

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


Gnu C library could be made to run programs as an administrator.

Software Description

  • glibc - GNU C Library
  • eglibc - GNU C Library


It was discovered that the GNU C library did not properly handle memory when processing environment variables for setuid programs. A local attacker could use this in combination with another vulnerability to gain administrative privileges.

Update instructions

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

Ubuntu 17.04
libc6 - 2.24-9ubuntu2.2
Ubuntu 16.10
libc6 - 2.24-3ubuntu2.2
Ubuntu 16.04 LTS
libc6 - 2.23-0ubuntu9
Ubuntu 14.04 LTS
libc6 - 2.19-0ubuntu6.13

To update your system, please follow these instructions:

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