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6.8
MEDIUM CVSS 3.0
CVE-2016-2167
Apache Subversion Cyrus SASL Authentication Bypass
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.

INFO

Published Date :

May 5, 2016, 6:59 p.m.

Last Modified :

April 12, 2025, 10:46 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2016-2167 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apache subversion
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.0 MEDIUM [email protected]
Solution
This addresses an authentication bypass vulnerability in Apache Subversion.
  • Update Apache Subversion to a patched version.
  • Upgrade Subversion packages to resolve this issue.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-2167.

URL Resource
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_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E
http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E
http://subversion.apache.org/security/CVE-2016-2167-advisory.txt Vendor Advisory
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
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_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E
http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E
http://subversion.apache.org/security/CVE-2016-2167-advisory.txt Vendor Advisory
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
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-2167 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2016-2167 weaknesses.

CAPEC-19: Embedding Scripts within Scripts Embedding Scripts within Scripts CAPEC-441: Malicious Logic Insertion Malicious Logic Insertion CAPEC-478: Modification of Windows Service Configuration Modification of Windows Service Configuration CAPEC-479: Malicious Root Certificate Malicious Root Certificate CAPEC-502: Intent Spoof Intent Spoof CAPEC-503: WebView Exposure WebView Exposure CAPEC-536: Data Injected During Configuration Data Injected During Configuration CAPEC-546: Incomplete Data Deletion in a Multi-Tenant Environment Incomplete Data Deletion in a Multi-Tenant Environment CAPEC-550: Install New Service Install New Service CAPEC-551: Modify Existing Service Modify Existing Service CAPEC-552: Install Rootkit Install Rootkit CAPEC-556: Replace File Extension Handlers Replace File Extension Handlers CAPEC-558: Replace Trusted Executable Replace Trusted Executable CAPEC-562: Modify Shared File Modify Shared File CAPEC-563: Add Malicious File to Shared Webroot Add Malicious File to Shared Webroot CAPEC-564: Run Software at Logon Run Software at Logon CAPEC-578: Disable Security Software Disable Security Software

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-2167 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2016-2167 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-05/msg00043.html
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-05/msg00044.html
    Added Reference http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E
    Added Reference http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E
    Added Reference http://subversion.apache.org/security/CVE-2016-2167-advisory.txt
    Added Reference http://www.debian.org/security/2016/dsa-3561
    Added Reference http://www.securityfocus.com/bid/89417
    Added Reference http://www.securitytracker.com/id/1035706
    Added Reference http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496
    Added Reference https://security.gentoo.org/glsa/201610-05
    Added Reference https://www.oracle.com/security-alerts/cpuoct2020.html
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E [No types assigned]
    Added Reference Red Hat, Inc. http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E [No types assigned]
    Removed Reference Red Hat, Inc. http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA@mail.gmail.com%3E
    Removed Reference Red Hat, Inc. http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ@mail.gmail.com%3E
  • CVE Modified by [email protected]

    Oct. 20, 2020

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/security-alerts/cpuoct2020.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 01, 2017

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/201610-05 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 01, 2016

    Action Type Old Value New Value
    Added Reference http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496 [No Types Assigned]
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-05/msg00044.html [No Types Assigned]
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-05/msg00043.html [No Types Assigned]
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 28, 2016

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/89417 [No Types Assigned]
  • Modified Analysis by [email protected]

    May. 06, 2016

    Action Type Old Value New Value
    Added CPE Configuration Configuration 1 OR *cpe:2.3:a:apache:subversion:1.9.0:*:*:*:*:*:*:* *cpe:2.3:a:apache:subversion:1.9.2:*:*:*:*:*:*:* *cpe:2.3:a:apache:subversion:1.9.1:*:*:*:*:*:*:* *cpe:2.3:a:apache:subversion:1.9.3:*:*:*:*:*:*:* *cpe:2.3:a:apache:subversion:1.8.15:*:*:*:*:*:*:* (and previous)
    Added CVSS V2 (AV:N/AC:M/Au:S/C:P/I:P/A:N)
    Added CVSS V3 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
    Changed Reference Type http://subversion.apache.org/security/CVE-2016-2167-advisory.txt No Types Assigned http://subversion.apache.org/security/CVE-2016-2167-advisory.txt Advisory
    Added CWE CWE-284
  • Initial Analysis by [email protected]

    May. 06, 2016

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 4.9
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.72 }} -0.26%

score

0.71521

percentile