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CVE-2018-6345

9.8 · CRITICAL

The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large.

Published Jan 15, 2019CWE-122EPSS 1.75%

Overview

CVE-2018-6345 is a critical-severity vulnerability. It was published on January 15, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. This affects all supported versions of HHVM (3.30.1 and 3.27.5 and below).

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/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3Refhhvm.com/blog/2019/01/14/hhvm-3.30.2.htmlGitHubgithub.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3Refhhvm.com/blog/2019/01/14/hhvm-3.30.2.html

How CyberStrike helps

Frequently asked questions

What is CVE-2018-6345?

CVE-2018-6345 is a critical-severity vulnerability. It was published on January 15, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2018-6345?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-6345?

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-2018-6345?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-6345 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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