Digium Asterisk up to 11.5.1 SIP Request input validation

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

Summaryinfo

A vulnerability marked as problematic has been reported in Digium Asterisk. This issue affects some unknown processing of the component SIP Request Handler. The manipulation leads to input validation. This vulnerability is documented as CVE-2013-5642. The attack can be initiated remotely. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Digium Asterisk (Communications System). This issue affects an unknown code of the component SIP Request Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

The SIP channel driver (channels/chan_sip.c) in Asterisk Open Source 1.8.x before 1.8.23.1, 10.x before 10.12.3, and 11.x before 11.5.1; Certified Asterisk 1.8.15 before 1.8.15-cert3 and 11.2 before 11.2-cert2; and Asterisk Digiumphones 10.x-digiumphones before 10.12.3-digiumphones allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and daemon crash) via an invalid SDP that defines a media description before the connection description in a SIP request.

The weakness was released 08/27/2013 by Matthew Jordan as AST-2013-005 as not defined bulletin (Website). It is possible to read the advisory at downloads.digium.com. The identification of this vulnerability is CVE-2013-5642 since 08/28/2013. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 69559 (Asterisk SIP Channel Driver Invalid SDP Denial of Service (AST-2013-005)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc.. 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 13417.

The vulnerability is also documented in the databases at Tenable (69559), SecurityFocus (BID 62022†), OSVDB (96690†), Secunia (SA54534†) and Vulnerability Center (SBV-41319†). Entry connected to this vulnerability is available at VDB-10092. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Asterisk Open Source 1.8.23.0/10.12.2./11.5.0
  • Certified Asterisk 1.8.15-cert2/11.2-cert1
  • Asterisk with Digiumphones 10.12.2-digiumphones

Productinfo

Type

Vendor

Name

Version

License

Website

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 69559
Nessus Name: Asterisk SIP Channel Driver Invalid SDP Denial of Service (AST-2013-005)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

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: 🔍

ISS Proventia IPS: 🔍
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 🔍
09/03/2013 +0 days 🔍
09/09/2013 +6 days 🔍
05/21/2021 +2811 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: AST-2013-005
Researcher: Matthew Jordan
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-5642 (🔍)
GCVE (CVE): GCVE-0-2013-5642
GCVE (VulDB): GCVE-100-10091

OVAL: 🔍

SecurityFocus: 62022 - Multiple Asterisk Products Invalid SDP Denial of Service Vulnerability
Secunia: 54534 - Asterisk Products SIP Channel Driver Two Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 96690
SecurityTracker: 1028957
Vulnerability Center: 41319 - Asterisk Open Source and Certified Asterisk NULL Pointer Dereference Vulnerability (CVE-2013-5642), Medium

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

Entryinfo

Created: 09/03/2013 12:43
Updated: 05/21/2021 20:00
Changes: 09/03/2013 12:43 (90), 12/24/2017 09:40 (2), 05/21/2021 19:53 (3), 05/21/2021 20:00 (1)
Complete: 🔍
Committer: olku
Cache ID: 216::103

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

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