Debian LTS: DLA-1726-1: bash security update
Summary
The popd builtin segfaulted when called with negative out of range
offsets.
CVE-2019-9924
Sylvain Beucler discovered that it was possible to call commands
that contained a slash when in restricted mode (rbash) by adding
them to the BASH_CMDS array.
For Debian 8 "Jessie", these problems have been fixed in version
4.3-11+deb8u2.
We recommend that you upgrade your bash packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS