An issue was discovered in QPDF before 7.0.0. There is a large heap-based out-of-bounds read in the PlBuffer::write function in PlBuffer.cc. It is caused by an integer overflow in the PNG filter.
{
"cpe": "cpe:2.3:a:qpdf_project:qpdf:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "7.0.0"
}
],
"source": [
"CPE_FIELD",
"REFERENCES"
]
}