CVE-2019-11930

Description

An invalid free in mb_detect_order can cause the application to crash or potentially result in remote code execution. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.41% Top 20%
Vendor Advisory hhvm.com Vendor Advisory facebook.com
Affected: Facebook HHVM
Published at:
Updated at:

References

Link Tags
https://github.com/facebook/hhvm/commit/524d2e60cfe910406ec6109e4286d7edd545ab36 patch
https://hhvm.com/blog/2019/10/28/security-update.html vendor advisory
https://www.facebook.com/security/advisories/cve-2019-11930 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-11930?
CVE-2019-11930 has been scored as a critical severity vulnerability.
How to fix CVE-2019-11930?
To fix CVE-2019-11930, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11930 being actively exploited in the wild?
It is possible that CVE-2019-11930 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-11930?
CVE-2019-11930 affects Facebook HHVM.
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