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AUSCERT External Security Bulletin Redistribution
ESB-2021.1384
USN-4925-1: Shibboleth vulnerability
23 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: shibboleth-sp
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-28963
Original Bulletin:
https://ubuntu.com/security/notices/USN-4925-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running shibboleth-sp check for an updated version of the software
for their operating system.
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USN-4925-1: Shibboleth vulnerability
22 April 2021
Shibboleth could be made to display malicious content.
Releases
o Ubuntu 20.04 LTS
Packages
o shibboleth-sp - Federated web single sign-on system
Details
Toni Huttunen and Fraktal Oy discovered that the Shibboleth Service
provider allowed content injection due to allowing attacker-controlled
parameters in error or other status pages. An attacker could use this to
inject malicious content.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o shibboleth-sp-common - 3.0.4+dfsg1-1ubuntu0.1
o libshibsp-plugins - 3.0.4+dfsg1-1ubuntu0.1
o libshibsp8 - 3.0.4+dfsg1-1ubuntu0.1
o libapache2-mod-shib - 3.0.4+dfsg1-1ubuntu0.1
o shibboleth-sp-utils - 3.0.4+dfsg1-1ubuntu0.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-28963
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