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 before 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
facebook hhvm |
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facebook hhvm 4.79.0 |
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facebook hhvm 4.80.0 |
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facebook hhvm 4.81.0 |
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facebook hhvm 4.82.0 |
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facebook hhvm 4.83.0 |
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