CVE-2011-0495

Name: CVE-2011-0495
Creator: NVD / NIST
Published: 2011-01-20T19:00:08.6+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.21%

Last modified Jun 16, 2026

CVE-2011-0495 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 4.21% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

4.21%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Digium	Asterisk	< c.3.6.2
Digium	Asterisk	>= 1.2.0, <= 1.2.40
Digium	Asterisk	>= 1.4.0, < 1.4.38.1
Digium	Asterisk	>= 1.4.39, < 1.4.39.1
Digium	Asterisk	>= 1.6.1, < 1.6.1.21
Digium	Asterisk	>= 1.6.2, < 1.6.2.15.1
Digium	Asterisk	>= 1.6.2.16, < 1.6.2.16.1
Digium	Asterisk	>= 1.8.0, < 1.8.1.2
Digium	Asterisk	>= 1.8.2, < 1.8.2.2
Digium	Asterisknow	1.5
Fedoraproject	Fedora	13
Fedoraproject	Fedora	14
Debian	Debian Linux	6.0
Digium	S800i Firmware	1.2.0

References

http://downloads.asterisk.org/pub/security/AST-2011-001-1.6.2.diffPatch, Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2011-001.htmlVendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053689.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053713.htmlThird Party Advisory
http://osvdb.org/70518Broken Link
http://secunia.com/advisories/42935Third Party Advisory
http://secunia.com/advisories/43119Third Party Advisory
http://secunia.com/advisories/43373Third Party Advisory
http://www.debian.org/security/2011/dsa-2171Third Party Advisory
http://www.securityfocus.com/archive/1/515781/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/45839Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2011/0159Permissions Required
http://www.vupen.com/english/advisories/2011/0281Permissions Required
http://www.vupen.com/english/advisories/2011/0449Permissions Required
https://exchange.xforce.ibmcloud.com/vulnerabilities/64831Third Party Advisory, VDB Entry
http://downloads.asterisk.org/pub/security/AST-2011-001-1.6.2.diffPatch, Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2011-001.htmlVendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053689.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053713.htmlThird Party Advisory
http://osvdb.org/70518Broken Link
http://secunia.com/advisories/42935Third Party Advisory
http://secunia.com/advisories/43119Third Party Advisory
http://secunia.com/advisories/43373Third Party Advisory
http://www.debian.org/security/2011/dsa-2171Third Party Advisory
http://www.securityfocus.com/archive/1/515781/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/45839Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2011/0159Permissions Required
http://www.vupen.com/english/advisories/2011/0281Permissions Required
http://www.vupen.com/english/advisories/2011/0449Permissions Required
https://exchange.xforce.ibmcloud.com/vulnerabilities/64831Third Party Advisory, VDB Entry

Timeline

Published: Jan 20, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-0495?

How severe is CVE-2011-0495?

Severity scoring for CVE-2011-0495 is pending analysis. The EPSS model estimates a 4.21% probability of exploitation in the next 30 days.

How do I fix CVE-2011-0495?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-0495?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST