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The canonicalize_username function in svnserve/cyrus_auth.c in Apache Subversion before 1.8.16 and 1.9.x before 1.9.4, when Cyrus SASL authentication is used, allows remote attackers to authenticate and bypass intended access restrictions via a realm string that is a prefix of an expected repository realm string.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade subversion | Aug 30, 2017 | May 5, 2016 |
| Amazon_linux | — | Upgrade subversionUpgrade mod_dav_svn | Jul 1, 2017 | May 5, 2016 |
| Debian | — | Upgrade subversion | Apr 29, 2016 | Apr 29, 2016 |
| Freebsd | — | Upgrade subversion18Upgrade subversion | Dec 10, 2025 | Apr 28, 2016 |
| Gentoo Linux | — | Upgrade net-libs/serf.Upgrade dev-vcs/subversion. | Oct 30, 2017 | May 5, 2016 |
| Huawei Euleros 2_0_sp2 | — | Upgrade subversionUpgrade subversion-libsUpgrade mod_dav_svn | Dec 4, 2019 | May 5, 2016 |
| Huawei Euleros 2_0_sp3 | — | Upgrade mod_dav_svnUpgrade subversionUpgrade subversion-libs | Dec 18, 2019 | May 5, 2016 |
| Huawei Euleros 2_0_sp5 | — | Upgrade subversionUpgrade subversion-libsUpgrade mod_dav_svn | Dec 11, 2019 | May 5, 2016 |
| Oracle Solaris | — | Upgrade entire/ to version 11.4-11.4.0.0.1.15.0 on Solaris 11.4 | Oct 19, 2018 | May 5, 2016 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Apr 28, 2016 |
| Suse | — | Upgrade subversion-pythonUpgrade subversion-perlUpgrade subversion-toolsUpgrade libsvn_auth_gnome_keyring-1-0Upgrade subversion-bash-completionUpgrade libsvn_auth_kwallet-1-0Upgrade subversionUpgrade subversion-serverUpgrade subversion-devel | May 6, 2016 | May 5, 2016 |
| Ubuntu | — | Upgrade libsvn1Upgrade libapache2-svnUpgrade libapache2-mod-svnUpgrade subversion | Aug 11, 2017 | May 5, 2016 |
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