CVE-2021-36367
PuTTY SSH Authentication Spoofing Vulnerability
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).
INFO
Published Date :
July 9, 2021, 9:15 p.m.
Last Modified :
Nov. 21, 2024, 6:13 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2021-36367 has a 7 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-36367.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Shell Roff Python
None
Shell Roff Python
None
Roff Python
None
Python
None
Python
None
SSH-MITM - ssh audits made simple
ssh ssh-server ssh-client mitmproxy mitm-server mitm-attacks security-audit security-tools mitm proxy ssh-mitm sftp scp security
Python Roff Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-36367 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-36367 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa Added Reference https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html Added Reference https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html Added Reference https://www.debian.org/security/2023/dsa-5588 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-345 Added CVSS V3.1 CISA-ADP AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 25, 2024
Action Type Old Value New Value Added Reference MITRE https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html [No types assigned] -
CVE Modified by [email protected]
Dec. 24, 2023
Action Type Old Value New Value Added Reference MITRE https://www.debian.org/security/2023/dsa-5588 [No types assigned] -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa [No types assigned] Removed Reference MITRE https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa -
Initial Analysis by [email protected]
Jul. 14, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Changed Reference Type https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa No Types Assigned https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa Mailing List, Patch, Third Party Advisory Changed Reference Type https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html No Types Assigned https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html Release Notes, Third Party Advisory Added CWE NIST CWE-345 Added CPE Configuration OR *cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:* versions up to (including) 0.75
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-36367 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-36367
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.13 }} -0.02%
score
0.48017
percentile