-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4092-1 [email protected] https://www.debian.org/lts/security/ Chris Lamb March 26, 2025 https://wiki.debian.org/LTS - -------------------------------------------------------------------------
Package : libcap2 Version : 1:2.44-1+deb11u1 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. For Debian 11 bullseye, these problems have been fixed in version 1:2.44-1+deb11u1. We recommend that you upgrade your libcap2 packages. For the detailed security status of libcap2 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libcap2 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEwv5L0nHBObhsUz5GHpU+J9QxHlgFAmfkDEUACgkQHpU+J9Qx Hli0ag//SnWmZy3HZviz/1gnE65hfSJPY9+TQF6o/zZEzGSxt2jXpZWG0846SBQK FCr6SQwMGjiBQTJnL5JSVszYFRwgZFe2IOYiYN9Q7M1zgOIzhjpKvwtjm9xA/Nb5 YbhLiBWsCskK133ghSXV90fLqaF2a8VXlfjTEO/2TspoXTGon1gxoizXtKgqDNA7 JtOrfoUxUj5oZnYuFeLYdRNoNWrLndb2OKxqpVv/fGkNLXiKtZjIQfXkXGtvMzYg Mk0+BCyyA9HH6Zi8yNF65Hk2/TAHs+ayC29f4FQrTRrOkVvbkn4n+PjLRmMfGbMY PqJYmZDyDQYSGGG3apSFlROc64aqgIu3+O3dxa2W5lVDPnIoNlX1nlBiE+lzgBY9 u8feqCdDDjgtPplgkmxM9n2pl7KIrq8a5c43+LkmAv3/5n6+iDuEBnPhD7XZiH2M lZxGxUtMXF6Q2PbmbAYIIMU3BW3yuKoicwtyK2Db4RyRU2BaPLN+yu1NchDlP85a beVWHOAKotPuFYvV9P9PguY44QzDn3FQ4Gw9S+UK8KAxqJ3s4WTIi0F6onefQKCU AgW83c82VebooyfgnQYztjf3jvuKCSmYXq9LvWFRDaWCFUyb+rsssWvSCrFhqDeJ azAjNE2O5hXbEdUBvvWKCUCNX/7RcRmNwFFjpVuqEf2IJRjXiYI= =Qo04 -----END PGP SIGNATURE-----
