Digium Asterisk up to 11.5.1 SIP Channel Termination memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Digium Asterisk. Impacted is an unknown function of the component SIP Channel Termination Handler. The manipulation results in memory corruption. This vulnerability is reported as CVE-2013-5641. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Digium Asterisk (Communications System). Affected is an unknown code block of the component SIP Channel Termination Handler. 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 availability. CVE summarizes:

The SIP channel driver (channels/chan_sip.c) in Asterisk Open Source 1.8.17.x through 1.8.22.x, 1.8.23.x before 1.8.23.1, and 11.x before 11.5.1 and Certified Asterisk 1.8.15 before 1.8.15-cert3 and 11.2 before 11.2-cert2 allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and daemon crash) via an ACK with SDP to a previously terminated channel. NOTE: some of these details are obtained from third party information.

The weakness was disclosed 08/27/2013 by Joshua Colp as AST-2013-004 as not defined advisory (Website). The advisory is shared for download at downloads.digium.com. This vulnerability is traded as CVE-2013-5641 since 08/28/2013. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 69886 (Fedora 19 : asterisk-11.5.1-2.fc19 (2013-15560)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 42418 (Asterisk Multiple Denial of Service Vulnerabilities (AST-2013-004, AST-2013-005)).

Upgrading to version 1.8.23.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13277.

The vulnerability is also documented in the databases at Tenable (69886), SecurityFocus (BID 62021†), OSVDB (96691†), Secunia (SA54534†) and Vulnerability Center (SBV-41318†). The entry VDB-10091 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69886
Nessus Name: Fedora 19 : asterisk-11.5.1-2.fc19 (2013-15560)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892749
OpenVAS Name: Debian Security Advisory DSA 2749-1 (asterisk - several vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Asterisk 1.8.23.1
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

08/27/2013 🔍
08/27/2013 +0 days 🔍
08/27/2013 +0 days 🔍
08/27/2013 +0 days 🔍
08/27/2013 +0 days 🔍
08/28/2013 +1 days 🔍
08/28/2013 +0 days 🔍
09/03/2013 +6 days 🔍
09/03/2013 +0 days 🔍
09/09/2013 +6 days 🔍
09/14/2013 +5 days 🔍
05/21/2021 +2806 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: AST-2013-004
Researcher: Joshua Colp
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-5641 (🔍)
GCVE (CVE): GCVE-0-2013-5641
GCVE (VulDB): GCVE-100-10092

OVAL: 🔍

SecurityFocus: 62021 - Multiple Asterisk Products SIP ACK With SDP Denial of Service Vulnerability
Secunia: 54534 - Asterisk Products SIP Channel Driver Two Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 96691
SecurityTracker: 1028956
Vulnerability Center: 41318 - Asterisk Open Source and Certified Asterisk NULL Pointer Dereference Vulnerability (CVE-2013-5641), Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 09/03/2013 12:50
Updated: 05/21/2021 20:14
Changes: 09/03/2013 12:50 (86), 05/10/2017 09:11 (6), 05/21/2021 20:07 (3), 05/21/2021 20:14 (1)
Complete: 🔍
Committer: olku
Cache ID: 216::103

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