Digium Asterisk 1.x UPDTL memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Digium Asterisk 1.x. It has been declared as critical. This vulnerability affects unknown code of the component UPDTL. Such manipulation leads to memory corruption. This vulnerability is traded as CVE-2011-1147. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Digium Asterisk 1.x (Communications System). Affected by this issue is some unknown processing of the component UPDTL. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Multiple stack-based and heap-based buffer overflows in the (1) decode_open_type and (2) udptl_rx_packet functions in main/udptl.c in Asterisk Open Source 1.4.x before 1.4.39.2, 1.6.1.x before 1.6.1.22, 1.6.2.x before 1.6.2.16.2, and 1.8 before 1.8.2.4; Business Edition C.x.x before C.3.6.3; AsteriskNOW 1.5; and s800i (Asterisk Appliance), when T.38 support is enabled, allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted UDPTL packet.

The weakness was shared 02/22/2011 with Asterisk (Website). The advisory is shared for download at downloads.asterisk.org. This vulnerability is handled as CVE-2011-1147 since 03/03/2011. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 52639 (Fedora 13 : asterisk-1.6.2.17-1.fc13 (2011-2558)), 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 119223 (Asterisk UPDTL Packets Buffer Overflow Vulnerabilities (AST-2011-002)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at downloads.asterisk.org. The best possible mitigation is suggested to be upgrading to the latest version. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11479.

The vulnerability is also documented in the databases at X-Force (65546), Tenable (52639), SecurityFocus (BID 46474†), Secunia (SA43429†) and SecurityTracker (ID 1025101†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 52639
Nessus Name: Fedora 13 : asterisk-1.6.2.17-1.fc13 (2011-2558)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 69568
OpenVAS Name: Debian Security Advisory DSA 2225-1 (asterisk)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: downloads.asterisk.org
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

02/21/2011 🔍
02/21/2011 +0 days 🔍
02/21/2011 +0 days 🔍
02/22/2011 +1 days 🔍
02/22/2011 +0 days 🔍
03/01/2011 +7 days 🔍
03/03/2011 +2 days 🔍
03/14/2011 +11 days 🔍
03/15/2011 +1 days 🔍
03/21/2011 +6 days 🔍
01/15/2025 +5049 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: downloads.asterisk.org
Organization: Asterisk
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1147 (🔍)
GCVE (CVE): GCVE-0-2011-1147
GCVE (VulDB): GCVE-100-4304

OVAL: 🔍

X-Force: 65546
SecurityFocus: 46474 - Asterisk UPDTL Packets Buffer Overflow Vulnerabilities
Secunia: 43429 - Asterisk UPDTL Buffer Overflow Vulnerabilities, Highly Critical
SecurityTracker: 1025101 - Asterisk UDPTL Array Overflows Let Remote Users Execute Arbitrary Code
Vulnerability Center: 29985 - Asterisk Remote Code Execution via a Crafted UDPTL Packet, Medium
Vupen: ADV-2011-0635

Entryinfo

Created: 03/21/2011 01:00
Updated: 01/15/2025 20:59
Changes: 03/21/2011 01:00 (76), 12/24/2017 09:34 (19), 03/19/2021 07:03 (2), 01/15/2025 20:59 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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