CVEvulnerability
CVE-2019-3556
8.1 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-10-26
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- CVSS 2.0 ([email protected])
- 5.5 MEDIUM — AV:N/AC:L/Au:S/C:N/I:P/A:P
- Weaknesses
- CWE-22
Description
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.
Affected configurations
• facebook hhvm (< 4.56.2)
• facebook hhvm (>= 4.57.0 <= 4.78.0)
• facebook hhvm 4.79.0
• facebook hhvm 4.80.0
• facebook hhvm 4.81.0
• facebook hhvm 4.82.0
• facebook hhvm 4.83.0
Related
Weakness · CWE (1)
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness
References
- https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4 Patch, Third Party Advisory
- https://hhvm.com/blog/2020/11/12/security-update.html Vendor Advisory
- https://www.facebook.com/security/advisories/cve-2019-3556 Broken Link
- https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4 Patch, Third Party Advisory
- https://hhvm.com/blog/2020/11/12/security-update.html Vendor Advisory
- https://www.facebook.com/security/advisories/cve-2019-3556 Broken Link