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6.8
MEDIUM CVSS 2.0
CVE-2011-1147
Asterisk Buffer Overflow Vulnerability
Description

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.

INFO

Published Date :

March 15, 2011, 5:55 p.m.

Last Modified :

April 11, 2025, 12:51 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2011-1147 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Digium asterisk
2 Digium asterisknow
3 Digium s800i
: Total Affected Vendor : 1 | Products : 3
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
Solution
A buffer overflow vulnerability exists in Asterisk, which could allow for a denial of service or arbitrary code execution.
  • Upgrade to Asterisk 1.4.39.2, 1.6.1.22, 1.6.2.16.2, 1.8.2.4 or later.
  • Alternatively, disable T.38 support by setting 't38pt_udptl' to 'no' in 'sip.conf' and ensure the chan_ooh323 module is not loaded.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2011-1147.

URL Resource
http://downloads.asterisk.org/pub/security/AST-2011-002.html Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055030.html Patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055421.html Patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055634.html Patch
http://secunia.com/advisories/43429 Vendor Advisory
http://secunia.com/advisories/43702 Vendor Advisory
http://www.debian.org/security/2011/dsa-2225
http://www.openwall.com/lists/oss-security/2011/03/11/2
http://www.openwall.com/lists/oss-security/2011/03/11/8
http://www.securityfocus.com/bid/46474
http://www.securitytracker.com/id?1025101
http://www.vupen.com/english/advisories/2011/0635 Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2011-002.html Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055030.html Patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055421.html Patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055634.html Patch
http://secunia.com/advisories/43429 Vendor Advisory
http://secunia.com/advisories/43702 Vendor Advisory
http://www.debian.org/security/2011/dsa-2225
http://www.openwall.com/lists/oss-security/2011/03/11/2
http://www.openwall.com/lists/oss-security/2011/03/11/8
http://www.securityfocus.com/bid/46474
http://www.securitytracker.com/id?1025101
http://www.vupen.com/english/advisories/2011/0635 Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2011-1147 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2011-1147 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2011-1147 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2011-1147 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://downloads.asterisk.org/pub/security/AST-2011-002.html
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055030.html
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055421.html
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055634.html
    Added Reference http://secunia.com/advisories/43429
    Added Reference http://secunia.com/advisories/43702
    Added Reference http://www.debian.org/security/2011/dsa-2225
    Added Reference http://www.openwall.com/lists/oss-security/2011/03/11/2
    Added Reference http://www.openwall.com/lists/oss-security/2011/03/11/8
    Added Reference http://www.securityfocus.com/bid/46474
    Added Reference http://www.securitytracker.com/id?1025101
    Added Reference http://www.vupen.com/english/advisories/2011/0635
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Mar. 16, 2011

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.8
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

2.84 }} -5.82%

score

0.84942

percentile