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AUSCERT External Security Bulletin Redistribution
ESB-2019.0965.2
libapache2-mod-auth-mellon security update
25 March 2019
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AusCERT Security Bulletin Summary
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Product: libapache2-mod-auth-mellon
Publisher: Debian
Operating System: Debian GNU/Linux 9
Linux variants
Impact/Access: Provide Misleading Information -- Remote/Unauthenticated
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-3878 CVE-2019-3877
Original Bulletin:
http://www.debian.org/security/2019/dsa-4414
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running libapache2-mod-auth-mellon check for an updated version of
the software for their operating system.
Revision History: March 25 2019: Corrected impact/access
March 25 2019: Initial Release
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Debian Security Advisory DSA-4414-1 security@debian.org
https://www.debian.org/security/ Thijs Kinkhorst
March 23, 2019 https://www.debian.org/security/faq
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Package : libapache2-mod-auth-mellon
CVE ID : CVE-2019-3877 CVE-2019-3878
Debian Bug : 925197
Several issues have been discovered in Apache module auth_mellon, which
provides SAML 2.0 authentication.
CVE-2019-3877
It was possible to bypass the redirect URL checking on logout, so
the module could be used as an open redirect facility.
CVE-2019-3878
When mod_auth_mellon is used in an Apache configuration which
serves as a remote proxy with the http_proxy module, it was
possible to bypass authentication by sending SAML ECP headers.
For the stable distribution (stretch), these problems have been fixed in
version 0.12.0-2+deb9u1.
We recommend that you upgrade your libapache2-mod-auth-mellon packages.
For the detailed security status of libapache2-mod-auth-mellon please
refer to its security tracker page at:
https://security-tracker.debian.org/tracker/libapache2-mod-auth-mellon
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/
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