SSH Session Vulnerability in PuTTY by Simon Tatham
CVE-2021-36367

8.1HIGH

Key Information:

Vendor

Putty

Status
Putty
Vendor
CVE Published:
9 July 2021

What is CVE-2021-36367?

PuTTY, a popular SSH client, is vulnerable to a security issue where it establishes SSH sessions without a proper authentication response. This flaw allows an attacker-controlled SSH server to present a fake authentication prompt to users. Unsuspecting users may inadvertently enter their credentials, leading to potential unauthorized data access or abuse. It is crucial for users to ensure they are using a patched version to mitigate this risk.

References

https://www.chiark.greenend.org.uk/~sgtatham/putty/change...
https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3B...
https://www.debian.org/security/2023/dsa-5588
vendor-advisory

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.