Vulnerabilities > CVE-2013-5642 - Improper Input Validation vulnerability in Digium Asterisk, Asterisk Digiumphones and Certified Asterisk

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
digium
CWE-20
nessus

Summary

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.

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-15567.NASL
    description - Thu Aug 29 2013 Jeffrey Ollie <jeff at ocjtech.us> - 11.5.1-2 : - Enable hardened build BZ#954338 - Significant clean ups - Thu Aug 29 2013 Jeffrey Ollie <jeff at ocjtech.us> - 11.5.1-1 : - The Asterisk Development Team has announced security releases for Certified - Asterisk 1.8.15, 11.2, and Asterisk 1.8, 10, and 11. The available security releases - are released as versions 1.8.15-cert2, 11.2-cert2, 1.8.23.1, 10.12.3, 10.12.3-digiumphones, - and 11.5.1. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2013-09-14
    plugin id69887
    published2013-09-14
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69887
    titleFedora 18 : asterisk-11.5.1-2.fc18 (2013-15567)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-15560.NASL
    description - Thu Aug 29 2013 Jeffrey Ollie <jeff at ocjtech.us> - 11.5.1-2 : - Enable hardened build BZ#954338 - Significant clean ups - Thu Aug 29 2013 Jeffrey Ollie <jeff at ocjtech.us> - 11.5.1-1 : - The Asterisk Development Team has announced security releases for Certified - Asterisk 1.8.15, 11.2, and Asterisk 1.8, 10, and 11. The available security releases - are released as versions 1.8.15-cert2, 11.2-cert2, 1.8.23.1, 10.12.3, 10.12.3-digiumphones, - and 11.5.1. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2013-09-14
    plugin id69886
    published2013-09-14
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69886
    titleFedora 19 : asterisk-11.5.1-2.fc19 (2013-15560)
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_FD2BF3B5100111E3BA940025905A4771.NASL
    descriptionThe Asterisk project reports : Remote Crash From Late Arriving SIP ACK With SDP Remote Crash when Invalid SDP is sent in SIP Request
    last seen2020-06-01
    modified2020-06-02
    plugin id69499
    published2013-08-29
    reporterThis script is Copyright (C) 2013-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/69499
    titleFreeBSD : asterisk -- multiple vulnerabilities (fd2bf3b5-1001-11e3-ba94-0025905a4771)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201401-15.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201401-15 (Asterisk: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Asterisk. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could execute arbitrary code with the privileges of the process, cause a Denial of Service condition, or obtain sensitive information. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id72054
    published2014-01-21
    reporterThis script is Copyright (C) 2014-2015 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/72054
    titleGLSA-201401-15 : Asterisk: Multiple vulnerabilities
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-2749.NASL
    descriptionColin Cuthbertson and Walter Doekes discovered two vulnerabilities in the SIP processing code of Asterisk - an open source PBX and telephony toolkit -, which could result in denial of service.
    last seen2020-03-17
    modified2013-09-03
    plugin id69542
    published2013-09-03
    reporterThis script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/69542
    titleDebian DSA-2749-1 : asterisk - several vulnerabilities
  • NASL familyMisc.
    NASL idASTERISK_AST_2013_005.NASL
    descriptionAccording to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a denial of service vulnerability. The application does not properly handle an invalid SDP in a SIP request if such a request defines media descriptions and then defines connection data.
    last seen2020-06-01
    modified2020-06-02
    plugin id69559
    published2013-09-03
    reporterThis script is Copyright (C) 2013-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69559
    titleAsterisk SIP Channel Driver Invalid SDP Denial of Service (AST-2013-005)
  • NASL familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2013-223.NASL
    descriptionUpdated asterisk packages fix security vulnerabilities : A remotely exploitable crash vulnerability exists in the SIP channel driver if an ACK with SDP is received after the channel has been terminated. The handling code incorrectly assumes that the channel will always be present (CVE-2013-5641). A remotely exploitable crash vulnerability exists in the SIP channel driver if an invalid SDP is sent in a SIP request that defines media descriptions before connection information. The handling code incorrectly attempts to reference the socket address information even though that information has not yet been set (CVE-2013-5642).
    last seen2020-06-01
    modified2020-06-02
    plugin id69540
    published2013-09-02
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69540
    titleMandriva Linux Security Advisory : asterisk (MDVSA-2013:223)