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 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, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
facebook hhvm |
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facebook hhvm 4.94.0 |
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facebook hhvm 4.95.0 |
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facebook hhvm 4.96.0 |
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facebook hhvm 4.97.0 |
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facebook hhvm 4.98.0 |
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