CVE-2018-6340

Description

The Memcache::getextendedstats function can be used to trigger an out-of-bounds read. Exploiting this issue requires control over memcached server hostnames and/or ports. This affects all supported versions of HHVM (3.30 and 3.27.4 and below).

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.43%
Third-Party Advisory github.com Third-Party Advisory hhvm.com
Affected: Facebook HHVM
Published at:
Updated at:

References

Link Tags
https://hhvm.com/blog/2018/12/18/hhvm-3.30.1.html third party advisory
https://github.com/facebook/hhvm/commit/4bff3bfbe90d10451e4638c2118d1ad1117bb3e3 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2018-6340?
CVE-2018-6340 has been scored as a high severity vulnerability.
How to fix CVE-2018-6340?
To fix CVE-2018-6340, 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-2018-6340 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-6340 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-6340?
CVE-2018-6340 affects Facebook HHVM.
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