subversion: svnserve/sasl may authenticate users using the wrong realm
Published May 5, 2016
6.8
MEDIUMCVSS 3.0
EPSS 6.81%
Description
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.
Affected products
No data.
- ≤ 1.8.15
- 1.9.0
- 1.9.1
- 1.9.2
- 1.9.3
No data.
Red Hat Enterprise Linux 5
subversion
Will not fix
Red Hat Enterprise Linux 6
subversion
Will not fix
Red Hat Enterprise Linux 7
subversion
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | subversion | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | subversion | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | subversion | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
AV:N/AC:M/Au:S/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.81% (0.06814) | 93.81th | v5 (v2026.06.15) |
| Sep 22, 2026 | 6.81% (0.06814) | 93.71th | v5 (v2026.06.15) |
| Sep 21, 2026 | 9.59% (0.09590) | 95.31th | v5 (v2026.06.15) |
| Sep 6, 2026 | 6.81% (0.06814) | 93.57th | v5 (v2026.06.15) |
| Sep 5, 2026 | 9.59% (0.09590) | 95.21th | v5 (v2026.06.15) |
| Aug 30, 2026 | 6.81% (0.06814) | 93.53th | v5 (v2026.06.15) |
| Aug 28, 2026 | 9.08% (0.09078) | 94.99th | v5 (v2026.06.15) |
| Aug 24, 2026 | 6.81% (0.06814) | 93.49th | v5 (v2026.06.15) |
| Aug 23, 2026 | 9.08% (0.09078) | 94.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.87% (0.06870) | 93.20th | v5 (v2026.06.15) |
| Jul 30, 2025 | 0.72% (0.00717) | 71.52th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.89% (0.01892) | 81.57th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.92% (0.06923) | 85.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.89% (0.01892) | 81.99th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.13% (0.00134) | 50.22th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.13% (0.00134) | 48.74th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.13% (0.00134) | 46.72th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.12% (0.03115) | 83.83th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.12% (0.03115) | 82.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.12% (0.03115) | 64.91th | v2 (v2022.01.01) |
References (17)
- http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00043.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00044.html vendor-advisoryx_refsource_SUSE
- http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E mailing-listx_refsource_MLIST
- http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E mailing-listx_refsource_MLIST
- http://subversion.apache.org/security/CVE-2016-2167-advisory.txt x_refsource_CONFIRMVendor Advisory
- http://www.debian.org/security/2016/dsa-3561 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/89417 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1035706 vdb-entryx_refsource_SECTRACK
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496 vendor-advisoryx_refsource_SLACKWARE
- https://access.redhat.com/security/cve/CVE-2016-2167 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1331686 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-2167
- https://security.gentoo.org/glsa/201610-05 vendor-advisoryx_refsource_GENTOO
- https://subversion.apache.org/security/CVE-2016-2167-advisory.txt
- https://www.cve.org/CVERecord?id=CVE-2016-2167
- https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISC
Change history (0)
No recorded changes yet.