In the mxf_read_primer_pack function in libavformat/mxfdec.c in FFmpeg 3.3.3 -> 2.4, an integer signedness error might occur when a crafted file, which claims a large "item_num" field such as 0xffffffff, is provided. As a result, the variable "item_num" turns negative, bypassing the check for a large value.
{
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
},
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
],
"vendor_product": "debian:debian_linux"
}
]
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:ffmpeg:ffmpeg:3.3.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.3.3"
},
{
"last_affected": "3.3.3"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "9d00fb9d70ee8c0cc7002b89318c5be00f1bbdad"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "a4e85b2e1c8d5b4bf0091157bbdeb0e457fb7b8f"
}
],
"source": "REFERENCES_COMMIT"
}
]
}