Digium Asterisk 1.4.44 main/utils.c ast_parse_digest memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, was found in Digium Asterisk 1.4.44 (Communications System). This affects the function ast_parse_digest of the file main/utils.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in the ast_parse_digest function in main/utils.c in Asterisk 1.8.x before and 10.x before 10.2.1 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long string in an HTTP Digest Authentication header.

The weakness was published 03/15/2012 by Russell Bryant (Website). The advisory is shared at downloads.asterisk.org. This vulnerability is uniquely identified as CVE-2012-1184 since 02/14/2012. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by Russell Bryant and been published immediately after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 58433 (Asterisk ast_parse_digest Function HTTP Digest Authentication String Parsing Remote Overflow (AST-2012-003)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc..

Upgrading to version 1.4.44,, eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (74083), Tenable (58433) and Exploit-DB (18855). Similar entry is available at VDB-4844.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 8.1

VulDB Base Score: 9.0
VulDB Temp Score: 8.1
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Russell Bryant
Download: 🔍

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Nessus ID: 58433
Nessus Name: Asterisk ast_parse_digest Function HTTP Digest Authentication String Parsing Remote Overflow (AST-2012-003)
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OpenVAS ID: 864314
OpenVAS Name: Fedora Update for asterisk FEDORA-2012-4230
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Threat Intelligenceinfo

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Recommended: Upgrade
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Upgrade: Asterisk 1.4.44,,
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02/14/2012 🔍
03/15/2012 +30 days 🔍
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03/16/2012 +1 days 🔍
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03/19/2012 +3 days 🔍
03/22/2012 +3 days 🔍
03/23/2012 +1 days 🔍
04/17/2012 +25 days 🔍
09/18/2012 +154 days 🔍
03/22/2021 +3107 days 🔍


Vendor: digium.com

Advisory: downloads.asterisk.org
Researcher: Russell Bryant
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-1184 (🔍)
X-Force: 74083 - Asterisk ast_parse_digest() buffer overflow, High Risk
SecurityTracker: 1026813 - Asterisk Stack Overflow in HTTP Manager Lets Remote Users Execute Arbitrary Code
Vulnerability Center: 34887 - Asterisk Utils.C Source File Remote DoS via a Long HTTP Digest Authentication Value, High
SecurityFocus: 52815 - Asterisk 'ast_parse_digest()' Stack Buffer Overflow Vulnerability
Secunia: 48417 - Asterisk Denial of Service and Buffer Overflow Vulnerabilities, Highly Critical
OSVDB: 80126

scip Labs: https://www.scip.ch/en/?labs.20161013
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Created: 03/19/2012 09:47 AM
Updated: 03/22/2021 08:05 AM
Changes: 03/19/2012 09:47 AM (84), 12/24/2017 09:42 AM (15), 03/22/2021 08:05 AM (2)
Complete: 🔍
Cache ID: 3:EFE:40


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