CVE-2016-2167

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.

Category

6.8
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.89% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory slackware.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory apache.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html vendor advisory
http://www.securityfocus.com/bid/89417 vdb entry
http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E mailing list
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496 vendor advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00044.html vendor advisory
http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E mailing list
http://lists.opensuse.org/opensuse-updates/2016-05/msg00043.html vendor advisory
http://www.debian.org/security/2016/dsa-3561 vendor advisory
http://www.securitytracker.com/id/1035706 vdb entry
https://security.gentoo.org/glsa/201610-05 vendor advisory
https://www.oracle.com/security-alerts/cpuoct2020.html
http://subversion.apache.org/security/CVE-2016-2167-advisory.txt vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-2167?
CVE-2016-2167 has been scored as a medium severity vulnerability.
How to fix CVE-2016-2167?
To fix CVE-2016-2167, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-2167 being actively exploited in the wild?
It is possible that CVE-2016-2167 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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