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CVE-2023-37457

7.5 · HIGH

Asterisk is an open source private branch exchange and telephony toolkit.

Published Dec 14, 2023CWE-120EPSS 1.12%

Overview

CVE-2023-37457 is a high-severity vulnerability. It was published on December 14, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 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

Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the 'update' functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the 'update' functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.

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

GitHubgithub.com/asterisk/asterisk/commit/a1ca0268254374b515fa5992f01340f7717113faGitHubgithub.com/asterisk/asterisk/security/advisories/GHSA-98rc-4j27-74hhReflists.debian.org/debian-lts-announce/2023/12/msg00019.htmlGitHubgithub.com/asterisk/asterisk/commit/a1ca0268254374b515fa5992f01340f7717113faGitHubgithub.com/asterisk/asterisk/security/advisories/GHSA-98rc-4j27-74hhReflists.debian.org/debian-lts-announce/2023/12/msg00019.html

How CyberStrike helps

Frequently asked questions

What is CVE-2023-37457?

CVE-2023-37457 is a high-severity vulnerability. It was published on December 14, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-37457?

This vulnerability has a CVSS 3.1 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-2023-37457?

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-2023-37457?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-37457 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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