https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 06 Oct 2026 22:26:49 +0000 https://vulnerability.circl.lu/vuln/cve-2023-2283 <p><strong>Affected:</strong> libssh</p> <p>A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.</p> <p><strong>Affected:</strong> libssh</p> <p>A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.</p> https://vulnerability.circl.lu/vuln/cve-2023-2283 https://vulnerability.circl.lu/vuln/usn-6138-1 <p><strong>Affected:</strong> Ubuntu:20.04:LTS: libssh, Ubuntu:22.04:LTS: libssh</p> <p>Philip Turnbull discovered that libssh incorrectly handled rekeying with algorithm guessing. A remote attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-1667)</p> <p>Kevin Backhouse discovered that libssh incorrectly handled verifying data signatures. A remote attacker could possibly use this issue to bypass authorization. (CVE-2023-2283)</p> <p><strong>Affected:</strong> Ubuntu:20.04:LTS: libssh, Ubuntu:22.04:LTS: libssh</p> <p>Philip Turnbull discovered that libssh incorrectly handled rekeying with algorithm guessing. A remote attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-1667)</p> <p>Kevin Backhouse discovered that libssh incorrectly handled verifying data signatures. A remote attacker could possibly use this issue to bypass authorization. (CVE-2023-2283)</p> https://vulnerability.circl.lu/vuln/usn-6138-1