A ksh security update has been released for Debian GNU/Linux 8 Extended LTS to address an issue where an attacker could override or bypass environment restrictions to execute shell commands.
ELA-568-1 ksh security update
Package ksh
ELA-568-1 ksh security update
Version 93u+20120801-1+deb8u1
Related CVEs CVE-2019-14868
A flaw was found in the way it evaluates certain environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Services and applications that allow remote unauthenticated attackers to provide one of those environment variables could allow them to exploit this issue remotely.
For Debian 8 jessie, these problems have been fixed in version 93u+20120801-1+deb8u1.
We recommend that you upgrade your ksh packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/
