CVE-2016-2167 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Reference

http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html http://lists.opensuse.org/opensuse-updates/2016-05/msg00043.html http://lists.opensuse.org/opensuse-updates/2016-05/msg00044.html http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ@mail.gmail.com3E http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA@mail.gmail.com3E http://subversion.apache.org/security/CVE-2016-2167-advisory.txt http://www.debian.org/security/2016/dsa-3561 http://www.securityfocus.com/bid/89417 http://www.securitytracker.com/id/1035706 http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496 https://security.gentoo.org/glsa/201610-05 https://www.oracle.com/security-alerts/cpuoct2020.html

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.8