Apache Subversion up to 1.8.15/1.9.3 mod_authz_svn mod_authz_svn.c null pointer dereference

entryeditHistoryDiffjsonxmlCTI
CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4$0-$5k0.00

A vulnerability was found in Apache Subversion up to 1.8.15/1.9.3 (Versioning Software). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file mod_authz_svn/mod_authz_svn.c of the component mod_authz_svn. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-476. As an impact it is known to affect availability.

The weakness was disclosed 04/29/2016 by Ivan Zhakov with VisualSVN as CVE-2016-2168-advisory.txt as confirmed advisory (Website). The advisory is shared at subversion.apache.org. This vulnerability is known as CVE-2016-2168 since 01/29/2016. The attack can be launched remotely. The successful exploitation needs a single authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 90802 (Slackware 14.0 / 14.1 / current : subversion (SSA:2016-121-01)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Slackware Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175729 (Debian Security Update for subversion (DSA 3561-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published 1 days after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

status = apr_uri_parse(r->pool, dest_uri, &parsed_dest_uri);
if (status)
  {
    ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
                  "Invalid URI in Destination header");
    return HTTP_BAD_REQUEST;
  }
if (!parsed_dest_uri.path)
  {
    ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
                  "Invalid URI in Destination header");
    return HTTP_BAD_REQUEST;
  }

The vulnerability is also documented in the databases at SecurityFocus (BID 89320), SecurityTracker (ID 1035707) and Tenable (90802). The entry 83076 is pretty similar.

Productinfoedit

Type

Vendor

Name

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.4

VulDB Base Score: 6.8
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2infoedit

AVACAuCIA
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfoedit

Class: Denial of service
CWE: CWE-476
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 90802
Nessus Name: Slackware 14.0 / 14.1 / current : subversion (SSA:2016-121-01)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 71855
OpenVAS Name: Mageia Linux Local Check: mgasa-2016-0161
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfoedit

01/29/2016 🔍
04/28/2016 +90 days 🔍
04/29/2016 +1 days 🔍
04/29/2016 +0 days 🔍
04/30/2016 +1 days 🔍
05/02/2016 +2 days 🔍
05/02/2016 +0 days 🔍
05/05/2016 +3 days 🔍
11/05/2018 +914 days 🔍

Sourcesinfoedit

Vendor: https://www.apache.org/

Advisory: CVE-2016-2168-advisory.txt
Researcher: Ivan Zhakov
Organization: VisualSVN
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2168 (🔍)
OVAL: 🔍

SecurityFocus: 89320 - Apache Subversion CVE-2016-2168 Remote Denial of Service Vulnerability
SecurityTracker: 1035707

See also: 🔍

Entryinfoedit

Created: 05/02/2016 09:02 AM
Updated: 11/05/2018 08:11 AM
Changes: (15) vulnerability_cwe vulnerability_cvss3_vuldb_av vulnerability_cvss3_vuldb_ac vulnerability_cvss3_vuldb_pr vulnerability_cvss3_vuldb_ui vulnerability_cvss3_vuldb_s vulnerability_cvss3_vuldb_c vulnerability_cvss3_vuldb_i vulnerability_cvss3_vuldb_a advisory_company_name advisory_confirm_url countermeasure_date source_cve_assigned source_securityfocus_date source_securityfocus_class
Complete: 🔍

Comments

No comments yet. Please log in to comment.

Interested in the pricing of exploits?

See the underground prices here!