Debian: DLA-2441-1 Critical: Sympa Privilege Escalation and Open Redirect

CVE-2020-26880

Sympa allows a local privilege escalation from the sympa user
account to full root access by modifying the sympa.conf
configuration file (which is owned by sympa) and parsing it
through the setuid sympa_newaliases-wrapper executable.

CVE-2018-1000671

Sympa contains a CWE-601: URL Redirection to Untrusted Site ('Open
Redirect') vulnerability in The "referer" parameter of the
wwsympa.fcgi login action. that can result in Open redirection and
reflected XSS via data URIs.

For Debian 9 stretch, these problems have been fixed in version
6.2.16~dfsg-3+deb9u4.

We recommend that you upgrade your sympa packages.

For the detailed security status of sympa please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/sympa

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