[CVE-2021-36367] Putty - spoofed authentication prompt (that the attacker can use to capture credential data)

XMAN · Jul 16, 2021

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).

CVSS Scores & Vulnerability Types

Vulnerability Type(s)
CVSS Score	5.8
Confidentiality Impact	Partial (There is considerable informational disclosure.)
Integrity Impact	Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact	None (There is no impact to the availability of the system.)
Access Complexity	Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication	Not required (Authentication is not required to exploit the vulnerability.)
Gained Access	None
CWE ID	345

- Products Affected By CVE-2021-36367

#	Product Type	Vendor	Product	Version	Update	Edition	Language
1	Application	Putty	Putty	*	*	*	*

[CVE-2021-36367] Putty - spoofed authentication prompt (that the attacker can use to capture credential data)

XMAN

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CVSS Scores & Vulnerability Types​

- Products Affected By CVE-2021-36367​

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CVSS Scores & Vulnerability Types

- Products Affected By CVE-2021-36367