CVE-2023-2283: fedoraproject fedora Improper Authentication

Vulnerability summary

CVE-2023-2283 is a medium (CVSS 6.5) Improper Authentication vulnerability in fedoraproject fedora. EPSS estimates a 1.06% chance of exploitation in the next 30 days, higher than 64% of scored vulnerabilities.

Timeline

1. 26-05-2023
   PublishedVulnerability first disclosed.
2. 03-11-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-287Improper AuthenticationWhen an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.