CVE IDs : CVE-2023-2602 CVE-2023-2603 CVE-2025-1390 Debian Bugs : 1036114 1098318
It was discovered that there were three issues in libcap2, a library for managing kernel "capabilities"; that is, partitioning the powerful single "root" privilege into a set of distinct privileges, typically used to limit any damage if a process running as the "root" user is exploited. The three issues are as follows:
CVE-2023-2602: A vulnerability was found in the pthread_create() function. This issue could have allowed a malicious actor in order to exhaust the system's memory.
CVE-2023-2603: An issue was found in the _libcap_strdup function which could have led to an integer overflow if the input string was close to 4GiB.
CVE-2025-1390: The pam_cap.so PAM module supports group names starting with "@" but during parsing, configurations not starting with "@" were incorrectly recognised as group names. This user-group confusion may have resulted in unintended users being granted an inherited capability set, potentially leading to security risks. Attackers could have exploited this vulnerability to achieve local privilege escalation on systems where capability.conf was used to configure user inherited privileges by constructing specific usernames.
1:2.44-1+deb11u1