CVE-2011-4063

Name: CVE-2011-4063
Creator: NVD / NIST
Published: 2011-10-21T10:55:03.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.38%

Last modified Jun 16, 2026

CVE-2011-4063 is a vulnerability of currently unknown severity. chan_sip.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.7.1 and 10.x before 10.0.0-rc1 does not properly initialize variables during request parsing, which allows remote authenticated users to cause a denial of service (daemon crash) via a malformed request.. EPSS estimates a 2.38% chance of exploitation in the next 30 days.

Description

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.7.1 and 10.x before 10.0.0-rc1 does not properly initialize variables during request parsing, which allows remote authenticated users to cause a denial of service (daemon crash) via a malformed request.

Metrics

EPSS Probability

2.38%

81.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Asterisk	Open Source	1.8.7
Asterisk	Open Source	10.0.0

References

Timeline

Published: Oct 21, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-4063?

How severe is CVE-2011-4063?

Severity scoring for CVE-2011-4063 is pending analysis. The EPSS model estimates a 2.38% probability of exploitation in the next 30 days.

How do I fix CVE-2011-4063?

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-2011-4063?

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

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Source: NVD / NIST