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AUSCERT External Security Bulletin Redistribution
ESB-2021.3030
USN-5069-1: mod-auth-mellon vulnerability
9 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: mod-auth-mellon
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3639
Reference: ESB-2021.2979
Original Bulletin:
https://ubuntu.com/security/notices/USN-5069-1
https://ubuntu.com/security/notices/USN-5069-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
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USN-5069-1: mod-auth-mellon vulnerability
08 September 2021
mod-auth-mellon could be made to redirect to arbitrary sites.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o libapache2-mod-auth-mellon - SAML 2.0 authentication module for Apache
Details
It was discovered that mod-auth-mellon incorrectly filtered certain URLs.
A remote attacker could possibly use this issue to perform an open redirect
attack.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o libapache2-mod-auth-mellon - 0.16.0-1ubuntu0.1
Ubuntu 18.04
o libapache2-mod-auth-mellon - 0.13.1-1ubuntu0.3
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-3639
Related notices
o USN-5069-2 : libapache2-mod-auth-mellon
- ------------------------------------------------------------------------------
USN-5069-2: mod-auth-mellon vulnerability
08 September 2021
mod-auth-mellon could be made to redirect to arbitrary sites.
Releases
o Ubuntu 21.04
Packages
o libapache2-mod-auth-mellon - SAML 2.0 authentication module for Apache
Details
USN-5069-1 fixed a vulnerability in mod-auth-mellon. This update provides
the corresponding updates for Ubuntu 21.04.
Original advisory details:
It was discovered that mod-auth-mellon incorrectly filtered certain URLs.
A remote attacker could possibly use this issue to perform an open redirect
attack.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.04
o libapache2-mod-auth-mellon - 0.17.0-1ubuntu0.21.04.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-3639
Related notices
o USN-5069-1 : libapache2-mod-auth-mellon
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