CyberRota Analysis
AI-GeneratedVersions of Data::HashMap::Shared prior to 0.14 for Perl are vulnerable to an out-of-bounds read due to insufficient validation of offsets and lengths in the shm_str_copy function. This flaw allows a local attacker with write access to the backing file to manipulate memory access, potentially leading to information disclosure or process crashes. Organizations utilizing this Perl module should prioritize patching to mitigate the risk of exploitation.
Original NVD Description
Data::HashMap::Shared versions before 0.14 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in shm_str_copy. The attach-time validator shm_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. shm_str_copy does memcpy(dst, arena + off, len) with off and len read raw from the mmap'd segment and unbounded, on the each, keys, values, pop, shift, take, swap, drain and cursor paths. The get path bounds off and len separately and is not affected. A local peer that can write the backing file can leave the header valid while poisoning a record's offset and length, so iterating or draining the map copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.