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CVE-2017-17850

7.5 · HIGH

An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older.

Published Dec 27, 2017CWE-20EPSS 75.35%

Overview

CVE-2017-17850 is a high-severity vulnerability. It was published on December 27, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refdownloads.asterisk.org/pub/security/AST-2017-014.htmlRefwww.securitytracker.com/id/1040056Refissues.asterisk.org/jira/browse/ASTERISK-27480Refsecurity.gentoo.org/glsa/201811-11Refdownloads.asterisk.org/pub/security/AST-2017-014.htmlRefwww.securitytracker.com/id/1040056Refissues.asterisk.org/jira/browse/ASTERISK-27480Refsecurity.gentoo.org/glsa/201811-11

How CyberStrike helps

Frequently asked questions

What is CVE-2017-17850?

CVE-2017-17850 is a high-severity vulnerability. It was published on December 27, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2017-17850?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-17850?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2017-17850?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-17850 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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