It was discovered that the Shibboleth Service Provider is prone to a
NULL pointer dereference flaw in the cookie-based session recovery
feature. A remote, unauthenticated attacker can take advantage of this
flaw to cause a denial of service (crash in the shibd daemon/service).
For additional information please refer to the upstream advisory at
For the stable distribution (buster), this problem has been fixed in
We recommend that you upgrade your shibboleth-sp packages.
For the detailed security status of shibboleth-sp please refer to its
security tracker page at:
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/
Mailing list: [email protected]
Debian Security Advisory DSA-4905-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
April 27, 2021 https://www.debian.org/security/faq