Insufficient Verification of Data Authenticity Affecting putty package, versions <0.76-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.13% (49th percentile)

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  • Snyk IDSNYK-ALPINE319-PUTTY-6108378
  • published8 Dec 2023
  • disclosed9 Jul 2021

Introduced: 9 Jul 2021

CVE-2021-36367  (opens in a new tab)
CWE-345  (opens in a new tab)

How to fix?

Upgrade Alpine:3.19 putty to version 0.76-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream putty package and not the putty package as distributed by Alpine. See How to fix? for Alpine:3.19 relevant fixed versions and status.

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 Base Scores

version 3.1