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CVE-2011-0495

6.0 · MEDIUM

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…

Published Jan 20, 2011digiumCWE-787EPSS 4.21%

Overview

CVE-2011-0495 is a medium-severity vulnerability affecting digium asterisk. It was published on January 20, 2011 and has a CVSS 2.0 base score of 6.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from digium. Update asterisk to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
digiumasterisk>= 0, < c.3.6.2Affected

References

Refdownloads.asterisk.org/pub/security/AST-2011-001-1.6.2.diffRefdownloads.asterisk.org/pub/security/AST-2011-001.htmlReflists.fedoraproject.org/pipermail/package-announce/2011-February/053689.htmlReflists.fedoraproject.org/pipermail/package-announce/2011-February/053713.htmlRefosvdb.org/70518Refsecunia.com/advisories/42935Refsecunia.com/advisories/43119Refsecunia.com/advisories/43373Refwww.debian.org/security/2011/dsa-2171Refwww.securityfocus.com/archive/1/515781/100/0/threaded

How CyberStrike helps

Frequently asked questions

What is CVE-2011-0495?

CVE-2011-0495 is a medium-severity vulnerability affecting digium asterisk. It was published on January 20, 2011 and has a CVSS 2.0 base score of 6.0 (MEDIUM).

How severe is CVE-2011-0495?

This vulnerability has a CVSS 2.0 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2011-0495?

Check the references section for vendor advisories and patches from digium. Update asterisk to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-0495?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-0495 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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