CVE-2021-36367
Last modified
CVE-2021-36367 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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).. EPSS estimates a 1.11% chance of exploitation in the next 30 days.
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).
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Putty | Putty | <= 0.75 |
References
- https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.htmlRelease Notes, Third Party Advisory
- https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.htmlRelease Notes, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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