facebook hhvm 4.57.0 vulnerabilities and exploits

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The fb_unserialize function did not impose a depth limit for nested deserialization. That meant a maliciously constructed string could cause deserialization to recurse, leading to stack exhaustion. This issue affected HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.5...

Facebook Hhvm Facebook Hhvm 4.57.0 Facebook Hhvm 4.58.0 Facebook Hhvm 4.58.1 Facebook Hhvm 4.59.0 Facebook Hhvm 4.60.0 Facebook Hhvm 4.61.0 Facebook Hhvm 4.62.0

The unserialize() function supported a type code, "S", which was meant to be supported only for APC serialization. This type code allowed arbitrary memory addresses to be accessed as if they were static StringData objects. This issue affected HHVM prior to v4.32.3, betw...

Facebook Hhvm Facebook Hhvm 4.57.0 Facebook Hhvm 4.58.0 Facebook Hhvm 4.58.1 Facebook Hhvm 4.59.0 Facebook Hhvm 4.60.0 Facebook Hhvm 4.61.0 Facebook Hhvm 4.62.0

When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property array before inserting anything into it. Otherwise the array might resize, invalidating previously stored references. This pre-reservation was not occurring in HHV...

Facebook Hhvm Facebook Hhvm 4.57.0 Facebook Hhvm 4.58.0 Facebook Hhvm 4.58.1 Facebook Hhvm 4.59.0 Facebook Hhvm 4.60.0 Facebook Hhvm 4.61.0 Facebook Hhvm 4.62.0

An incorrect size calculation in ldap_escape may lead to an integer overflow when overly long input is passed in, resulting in an out-of-bounds write. This issue affects HHVM before 4.56.2, all versions between 4.57.0 and 4.78.0, 4.79.0, 4.80.0, 4.81.0, 4.82.0, 4.83.0.

Facebook Hhvm 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

Incorrect bounds calculations in substr_compare could lead to an out-of-bounds read when the second string argument passed in is longer than the first. This issue affects HHVM versions before 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, ...

Facebook Hhvm Facebook Hhvm 4.94.0 Facebook Hhvm 4.95.0 Facebook Hhvm 4.96.0 Facebook Hhvm 4.97.0 Facebook Hhvm 4.98.0

Due to incorrect string size calculations inside the preg_quote function, a large input string passed to the function can trigger an integer overflow leading to a heap overflow. This issue affects HHVM versions before 4.56.3, all versions between 4.57.0 and 4.80.1, all versions b...

Facebook Hhvm Facebook Hhvm 4.94.0 Facebook Hhvm 4.95.0 Facebook Hhvm 4.96.0 Facebook Hhvm 4.97.0 Facebook Hhvm 4.98.0

In the crypt function, we attempt to null terminate a buffer using the size of the input salt without validating that the offset is within the buffer. This issue affects HHVM versions before 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, a...

Facebook Hhvm Facebook Hhvm 4.94.0 Facebook Hhvm 4.95.0 Facebook Hhvm 4.96.0 Facebook Hhvm 4.97.0 Facebook Hhvm 4.98.0

2 Github repositories

In-memory file operations (ie: using fopen on a data URI) did not properly restrict negative seeking, allowing for the reading of memory prior to the in-memory buffer. This issue affects HHVM versions before 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.8...

Facebook Hhvm Facebook Hhvm 4.94.0 Facebook Hhvm 4.95.0 Facebook Hhvm 4.96.0 Facebook Hhvm 4.97.0 Facebook Hhvm 4.98.0

xbuf_format_converter, used as part of exif_read_data, was appending a terminating null character to the generated string, but was not using its standard append char function. As a result, if the buffer was full, it would result in an out-of-bounds write. This issue affects HHVM ...

Facebook Hhvm Facebook Hhvm 4.94.0 Facebook Hhvm 4.95.0 Facebook Hhvm 4.96.0 Facebook Hhvm 4.97.0 Facebook Hhvm 4.98.0

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 whi...

Facebook Hhvm 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

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