CVE-2021-36367
low
CVSS v3
—
CVSS v2
—
VIR risk
2.5
Description
PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user).
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-36367
Vendor advisory: arch — https://security.archlinux.org/ASA-202107-37
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.76-1 | |
| debian | bookworm | fixed | 0.75-3 |
| debian | bullseye | fixed | 0.74-1+deb11u1 |
| debian | forky | fixed | 0.75-3 |
| debian | sid | fixed | 0.75-3 |
| debian | trixie | fixed | 0.75-3 |
References
Verify integrity in audit chain (admin only). AS-IS.