A sudo security update has been released for Debian GNU/Linux 7 Extended LTS to address a privilege escalation vulnerability in sudo.

ELA-213-1 sudo security update

Package sudo
Version 1.8.5p2-1+nmu3+deb7u6
Related CVE CVE-2019-18634

A privilege escalation vulnerability was discovered in sudo, a tool to allow users to run programs with the security privileges of another user.

If pwfeedback was enabled in /etc/sudoers, users could trigger a stack-based buffer overflow in the privileged sudo process.

Note that whilst pwfeedback is a default setting in some distributions (eg. Linux Mint and elementary OS) it is not the upstream default and thus should only exist if enabled by an administrator.

For Debian 7 Wheezy, these problems have been fixed in version 1.8.5p2-1+nmu3+deb7u6.

We recommend that you upgrade your sudo packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/