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CVSS: 9.8EPSS: 0%CPEs: 8EXPL: 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 versions prior to 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. La función xbuf_format_converter, usada como parte de exif_read_data, estaba agregando un carácter null de terminación a la cadena generada, pero no estaba usando su función estándar append char. Como resultado, si el búfer estuviera lleno, resultaría en una escritura fuera de límites. • https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca https://hhvm.com/blog/2021/02/25/security-update.html • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •

CVSS: 9.8EPSS: 0%CPEs: 7EXPL: 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 prior to 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. Un cálculo de tamaño incorrecto en la función ldap_escape puede conllevar a un desbordamiento de enteros cuando es pasada una entrada demasiado larga, resultando en una escritura fuera de límites. Este problema afecta a HHVM versiones anteriores a 4.56.2, todas las versiones entre 4.57.0 y 4.78.0, 4.79.0, 4.80.0, 4.81.0, 4.82.0, 4.83.0 • https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4 https://hhvm.com/blog/2020/11/12/security-update.html • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •