CVE-2011-0495: Buffer Overflow
First published: Thu Jan 20 2011(Updated: )
Stack-based buffer overflow in the ast_uri_encode function in main/utils.c in Asterisk Open Source before 1.4.38.1, 1.4.39.1, 1.6.1.21, 1.6.2.15.1, 1.6.2.16.1, 1.8.1.2, 1.8.2.; and Business Edition before C.3.6.2; when running in pedantic mode allows remote authenticated users to execute arbitrary code via crafted caller ID data in vectors involving the (1) SIP channel driver, (2) URIENCODE dialplan function, or (3) AGI dialplan function.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| AsteriskNOW | =1.5 | |
| Asterisk | >=1.2.0<=1.2.40 | |
| Asterisk | <c.3.6.2 | |
| Asterisk | >=1.6.2.16<1.6.2.16.1 | |
| Asterisk | >=1.4.39<1.4.39.1 | |
| Asterisk | >=1.6.1<1.6.1.21 | |
| Asterisk | >=1.4.0<1.4.38.1 | |
| Asterisk | >=1.6.2<1.6.2.15.1 | |
| Asterisk | >=1.8.2<1.8.2.2 | |
| Asterisk | >=1.8.0<1.8.1.2 | |
| Fedora | =13 | |
| Fedora | =14 | |
| Debian | =6.0 | |
| Digium S800i | =1.2.0 | |
| Digium S800i Firmware |
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Reference Links
- http://downloads.asterisk.org/pub/security/AST-2011-001.html
- http://www.securityfocus.com/bid/45839
- http://downloads.asterisk.org/pub/security/AST-2011-001-1.6.2.diff
- http://www.vupen.com/english/advisories/2011/0159
- http://osvdb.org/70518
- http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053713.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053689.html
- http://secunia.com/advisories/43119
- http://www.vupen.com/english/advisories/2011/0281
- http://secunia.com/advisories/42935
- http://www.debian.org/security/2011/dsa-2171
- http://www.vupen.com/english/advisories/2011/0449
- http://secunia.com/advisories/43373
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64831
- http://www.securityfocus.com/archive/1/515781/100/0/threaded
Frequently Asked Questions
What is the severity of CVE-2011-0495?
CVE-2011-0495 has a high severity rating due to the potential for remote authenticated users to execute arbitrary code.
How do I fix CVE-2011-0495?
To fix CVE-2011-0495, upgrade Asterisk to version 1.4.38.1, 1.4.39.1, 1.6.1.21, 1.6.2.15.1, 1.6.2.16.1, 1.8.1.2, 1.8.2 or higher.
Which versions of Asterisk are affected by CVE-2011-0495?
CVE-2011-0495 affects Asterisk versions earlier than 1.4.38.1, 1.4.39.1, and several other specific versions.
Can CVE-2011-0495 be exploited remotely?
Yes, CVE-2011-0495 can be exploited remotely by authenticated users when running Asterisk in pedantic mode.
What type of vulnerability is CVE-2011-0495?
CVE-2011-0495 is a stack-based buffer overflow vulnerability.
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