Before correction, theย copy_file_rangeย system call checked only for the CAP_READ and CAP_WRITE capabilities on the input and output file descriptors, respectively. Using an offset is logically equivalent to seeking, and the system call must additionally require the CAP_SEEK capability.
This incorrect privilege check enabled sandboxed processes with only read or write but no seek capability on a file descriptor to read data from or write data to an arbitrary location within the file corresponding to that file descriptor.
[
{
"defaultStatus": "unknown",
"modules": [
"capsicum"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "p4",
"status": "affected",
"version": "13.2-RELEASE",
"versionType": "release"
}
]
}
]