CVE-2020-1730
Description
A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-1730
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2020:4545
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-1730.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202004-11
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.9.4-1 | |
| sles | affected | | |
| rocky | 8 | fixed | |
| debian | bookworm | fixed | 0.9.4-1 |
| debian | bullseye | fixed | 0.9.4-1 |
| debian | forky | fixed | 0.9.4-1 |
| debian | sid | fixed | 0.9.4-1 |
| debian | trixie | fixed | 0.9.4-1 |
References
Verify integrity in audit chain (admin only). AS-IS.