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CVE-2021-36367

Published: Jul 9, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-345
NVD MITRE
8.1CVSSHIGH
EPSS Score
1.1%
Top 38.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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).

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-345

Affected Products

puttyputty
Mixed
Consumer Software / file-utility
n/an/a
PuTTYСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
puttyoss-projectConsumer Software
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa
git.tartarus.org
https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html
lists.debian.org
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
chiark.greenend.org.uk
and 5 more references View all →

Timeline

Published
Jul 9, 2021
Last Updated
Nov 21, 2024

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