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 filesystem to write this data. The parameter is not validated, allowing a malicious user to overwrite arbitrary files where the user running HHVM has write access. This issue affects HHVM versions prior to 4.56.2, all versions between 4.57.0 and 4.78.0, as well as 4.79.0, 4.80.0, 4.81.0, 4.82.0, and 4.83.0.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: facebook

Published: 2021-10-26T20:05:10

Updated: 2024-08-04T19:12:09.554Z

Reserved: 2019-01-02T00:00:00

Link: CVE-2019-3556

cve-icon Vulnrichment

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cve-icon NVD

Status : Analyzed

Published: 2021-10-26T20:15:07.603

Modified: 2021-10-29T16:38:50.707

Link: CVE-2019-3556

cve-icon Redhat

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