Advisory ROSA-SA-2021-1893

Software: libssh2 1.8.0
OS: Cobalt 7.9

CVE-ID: CVE-2019-13115
CVE-Crit: HIGH
CVE-DESC: In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that can cause out-of-range reads when reading packets from the server. A remote attacker compromising the SSH server could reveal sensitive information or cause a denial of service on the client system when a user connects to the server. This is related to the _libssh2_check_length bug and is different from various issues fixed in 1.8.1, such as CVE-2019-3855.
CVE-STATUS: default
CVE-REV: default

CVE-ID: CVE-2019-3860
CVE-Crit: CRITICAL
CVE-DESC: libssh2 before 1.8.1 had an out-of-range read error in the way SFTP packets with empty payload data were analyzed. A remote attacker compromising an SSH server could cause a denial of service or read data in client memory.
CVE-STATUS: default
CVE-REV: default

CVE-ID: CVE-2019-3859
CVE-Crit: CRITICAL
CVE-DESC: An out-of-bounds read error was detected in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker compromising an SSH server can cause a denial of service or read data in client memory.
CVE-STATUS: default
CVE-REV: Default