CVE-2019-3556

HHVM supports the use of an "admin" server which accepts administrative requests over HTTP. One of those request handlers, dump-pcre-cache, can be used to output cached regular expressions from the current execution context into a file. The handler takes a parameter which specifies where on the...

CVE-2019-3556

The CVE-2019-3556 issue affects HHVM where the admin server’s dump-pcre-cache handler accepts an unvalidated filesystem path parameter, enabling a malicious user to overwrite arbitrary files with the privileges of the HHVM user. This can write to arbitrary locations and is tied to HHVM versions: ...