All errata/sisyphus_e2k/ALT-PU-2023-4192-1
ALT-PU-2023-4192-1

Package update libssh in branch sisyphus_e2k

Version0.10.5-alt1
Task#0
Published2023-07-05
Max severityMEDIUM
Severity:

Closed issues (2)

CVE-2023-1667
MEDIUM6.5

A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.

Published: 2023-05-26Modified: 2024-11-21
CVSS 3.xMEDIUM 6.5
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
CVE-2023-2283
MEDIUM6.5

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.

Published: 2023-05-26Modified: 2025-11-03
CVSS 3.xMEDIUM 6.5
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
References