2018-001 Security flaws in template editing
The Sympa Community
A fix is available for a vulnerability discovered in Sympa web interface.
- All versions prior to Sympa 6.2.32
A vulnerability has been discovered in Sympa web interface that allows write access to files on the server filesystem.
This flaw allows to create or modify any file writable by the Sympa user, located on the server filesystem, using the function of Sympa web interface template file saving.
Possibility to create or modify files on the server filesystem.
Users who can't upgrade to the latest version have the following workaround solution: Disable access to corresponding function through the web interface.
- Configure HTTP server to deny access to the location under
<wwsympa_url>/savefile/. For more details consult documentation of HTTP server you are using.
Upgrade to version 6.2.32
- Source distribution: sympa-6.2.32.tar.gz
- Binary distributions: Check release information by distributors.
Apply a patch
- For 6.2.28 to 6.2.30: sympa-6.2.30-sa-2018-001.patch
- For 6.2.4 to 6.2.24: sympa-6.2.24-sa-2018-001.patch
- For 6.2 to 6.2.3: sympa-6.2.3-sa-2018-001.patch
- For 6.1.x: sympa-6.1.25-sa-2018-001-r1.0.patch
Download appropriate patch file and save it in your server. Move into the directory where
wwsympa.fcgiis installed, and apply patch:
# patch -p1 < sympa-6.2.XX-sa-2018-001.patch
Then restart web interface.
Versions prior to 6.2 are no longer maintained. Users of these versions should upgrade to 6.2.32 to prevent potential attacks.
The security flaw this advisory describes was reported by Michael Kaczmarczik, UT Austin ITS, Systems Enterprise Services, working with the UT Austin Information Security Office.
This advisory was published with assistance by CERT RENATER.
Initial version published
- Solution: Adding links to patches for versions earlier than 6.2.4.
- Acknowledgements: Creating section.
- CVE Numbers: CVE-2018-1000550 was assigned.