description: 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.
problem types: Heap-based Buffer Overflow (CWE-122)
affected:
{
product: HHVM
vendor: Facebook
versions:
lessThan: unspecified, status: unaffected, version: 4.98.1, versionType: custom
status: affected, version: 4.98.0
lessThan: unspecified, status: unaffected, version: 4.97.1, versionType: custom
status: affected, version: 4.97.0
lessThan: unspecified, status: unaffected, version: 4.96.1, versionType: custom
status: affected, version: 4.96.0
lessThan: unspecified, status: unaffected, version: 4.95.1, versionType: custom
status: affected, version: 4.95.0
lessThan: unspecified, status: unaffected, version: 4.94.1, versionType: custom
status: affected, version: 4.94.0
lessThan: unspecified, status: unaffected, version: 4.93.2, versionType: custom
lessThan: unspecified, status: affected, version: 4.81.0, versionType: custom
lessThan: unspecified, status: unaffected, version: 4.80.2, versionType: custom
lessThan: unspecified, status: affected, version: 4.57.0, versionType: custom
lessThan: unspecified, status: unaffected, version: 4.56.3, versionType: custom
lessThan: 4.56.3, status: affected, version: unspecified, versionType: custom
}