CVE-2011-2216: Null Pointer Dereference
First published: Mon Jun 06 2011(Updated: )
reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.2 does not initialize certain strings, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed Contact header.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Asterisk | =1.8.0 | |
| Asterisk | =1.8.0-beta1 | |
| Asterisk | =1.8.0-beta2 | |
| Asterisk | =1.8.0-beta3 | |
| Asterisk | =1.8.0-beta4 | |
| Asterisk | =1.8.0-beta5 | |
| Asterisk | =1.8.0-rc2 | |
| Asterisk | =1.8.0-rc3 | |
| Asterisk | =1.8.0-rc4 | |
| Asterisk | =1.8.0-rc5 | |
| Asterisk | =1.8.1 | |
| Asterisk | =1.8.1-rc1 | |
| Asterisk | =1.8.1.1 | |
| Asterisk | =1.8.1.2 | |
| Asterisk | =1.8.2 | |
| Asterisk | =1.8.2.1 | |
| Asterisk | =1.8.2.2 | |
| Asterisk | =1.8.2.3 | |
| Asterisk | =1.8.2.4 | |
| Asterisk | =1.8.3 | |
| Asterisk | =1.8.3-rc1 | |
| Asterisk | =1.8.3-rc2 | |
| Asterisk | =1.8.3-rc3 | |
| Asterisk | =1.8.3.1 | |
| Asterisk | =1.8.3.2 | |
| Asterisk | =1.8.3.3 | |
| Asterisk | =1.8.4 | |
| Asterisk | =1.8.4-rc1 | |
| Asterisk | =1.8.4-rc2 | |
| Asterisk | =1.8.4-rc3 | |
| Asterisk | =1.8.4.1 |
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Reference Links
- http://downloads.digium.com/pub/security/AST-2011-007.html
- http://securitytracker.com/id?1025598
- http://osvdb.org/72752
- http://www.securityfocus.com/bid/48096
- http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062658.html
- http://secunia.com/advisories/44828
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062013.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67812
- http://www.securityfocus.com/archive/1/518236/100/0/threaded
Frequently Asked Questions
What is the severity of CVE-2011-2216?
The severity of CVE-2011-2216 is classified as a denial of service vulnerability due to a NULL pointer dereference.
How do I fix CVE-2011-2216?
To fix CVE-2011-2216, upgrade to Asterisk version 1.8.4.2 or later.
Which versions of Asterisk are affected by CVE-2011-2216?
CVE-2011-2216 affects Asterisk versions 1.8.x prior to 1.8.4.2.
What kind of attacks can exploit CVE-2011-2216?
CVE-2011-2216 can be exploited by remote attackers sending malformed Contact headers, causing the daemon to crash.
Is there a workaround for CVE-2011-2216?
Currently, the recommended action for CVE-2011-2216 is to apply the software update, as no specific workaround is provided.
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- vendor/digium
- canonical/asterisk
- version/asterisk/1.8.0
- version/asterisk/1.8.0-beta1
- version/asterisk/1.8.0-beta2
- version/asterisk/1.8.0-beta3
- version/asterisk/1.8.0-beta4
- version/asterisk/1.8.0-beta5
- version/asterisk/1.8.0-rc2
- version/asterisk/1.8.0-rc3
- version/asterisk/1.8.0-rc4
- version/asterisk/1.8.0-rc5
- version/asterisk/1.8.1
- version/asterisk/1.8.1-rc1
- version/asterisk/1.8.1.1
- version/asterisk/1.8.1.2
- version/asterisk/1.8.2
- version/asterisk/1.8.2.1
- version/asterisk/1.8.2.2
- version/asterisk/1.8.2.3
- version/asterisk/1.8.2.4
- version/asterisk/1.8.3
- version/asterisk/1.8.3-rc1
- version/asterisk/1.8.3-rc2
- version/asterisk/1.8.3-rc3
- version/asterisk/1.8.3.1
- version/asterisk/1.8.3.2
- version/asterisk/1.8.3.3
- version/asterisk/1.8.4
- version/asterisk/1.8.4-rc1
- version/asterisk/1.8.4-rc2
- version/asterisk/1.8.4-rc3
- version/asterisk/1.8.4.1