mod_auth_mellon up to 0.11.0 POST Data am_read_post_data memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in mod_auth_mellon up to 0.11.0. This vulnerability affects the function am_read_post_data of the component POST Data Handler. This manipulation causes memory corruption. The identification of this vulnerability is CVE-2016-2146. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in mod_auth_mellon up to 0.11.0. Affected by this vulnerability is the function am_read_post_data of the component POST Data Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. The summary by CVE is:

The am_read_post_data function in mod_auth_mellon before 0.11.1 does not limit the amount of data read, which allows remote attackers to cause a denial of service (worker process crash, web server deadlock, or memory consumption) via a large amount of POST data.

The weakness was shared 04/15/2016 (Website). It is possible to read the advisory at sympa.uninett.no. This vulnerability is known as CVE-2016-2146 since 01/28/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 90038 (Fedora 23 : mod_auth_mellon-0.11.1-1.fc23 (2016-5cf6959198)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276003 (Fedora Security Update for mod_auth_mellon (FEDORA-2016-5cf6959198)).

Upgrading to version 0.11.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (90038). The entry VDB-82458 is related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 90038
Nessus Name: Fedora 23 : mod_auth_mellon-0.11.1-1.fc23 (2016-5cf6959198)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for mod_auth_mellon FEDORA-2016-5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: mod_auth_mellon 0.11.1
Patch: github.com

Timelineinfo

01/28/2016 🔍
03/18/2016 +50 days 🔍
03/20/2016 +2 days 🔍
04/15/2016 +25 days 🔍
04/15/2016 +0 days 🔍
04/17/2016 +2 days 🔍
07/25/2022 +2290 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-5cf6959198
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2146 (🔍)
GCVE (CVE): GCVE-0-2016-2146
GCVE (VulDB): GCVE-100-82459
See also: 🔍

Entryinfo

Created: 04/17/2016 19:11
Updated: 07/25/2022 07:20
Changes: 04/17/2016 19:11 (55), 10/11/2018 13:14 (18), 07/25/2022 07:20 (5)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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