For the oldstable distribution (jessie), this problem has been fixed
in version 0.99.23.1-1+deb8u4.
For the stable distribution (stretch), this problem has been fixed in
version 1.1.1-3+deb9u1.
We recommend that you upgrade your quagga packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Get the latest Linux and open source security news straight to your inbox.