High severity · published Dec 31, 2018
CVE-2018-6340
The Memcache::getextendedstats function can be used to trigger an out-of-bounds read
8.1
CVSS
1.4%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
Hhvm · Facebook
through 3.27.4; 3.30 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-6340
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-6340
Patch
https://github.com/facebook/hhvm/commit/4bff3bfbe90d10451e4638c2118d1ad1117bb3e3
Third Party Advisory
https://hhvm.com/blog/2018/12/18/hhvm-3.30.1.html
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