CVE-2023-2283
Published: October 18, 2023Last modified: October 18, 2023
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | LOW |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libssh | Not affected (0.10.5-r0) |
| Stream | libssh | Not affected (0.10.5-r0) |
References
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html
- https://access.redhat.com/security/cve/CVE-2023-2283
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
- https://security.gentoo.org/glsa/202312-05
- https://security.netapp.com/advisory/ntap-20240201-0005/
- https://www.libssh.org/security/advisories/CVE-2023-2283.txt