CyberRota Analysis
AI-GeneratedThe Data::ReqRep::Shared module for Perl prior to version 0.05 is vulnerable due to the creation of a world-readable mmap backing file in shared directories, allowing local users to access sensitive IPC payloads. The lack of O_EXCL and O_NOFOLLOW flags enables attackers to exploit symlink attacks or pre-existing files, leading to potential information disclosure. Organizations utilizing this module should prioritize patching to mitigate the risk of local privilege escalation and data exposure.
Original NVD Description
Data::ReqRep::Shared versions before 0.05 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW. The segment is created in reqrep.h with open(path, O_RDWR | O_CREAT, 0666), for both the request-reply and the integer-variant segments. The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing. A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.