Vulnerability Details : CVE-2021-36367
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).
Products affected by CVE-2021-36367
- cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-36367
0.15%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-36367
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
8.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
2.8
|
5.2
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 | 2024-07-03 |
8.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
2.8
|
5.2
|
NIST |
CWE ids for CVE-2021-36367
-
The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.Assigned by:
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
- nvd@nist.gov (Primary)
References for CVE-2021-36367
-
https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa
git.tartarus.org Git - simon/putty.git/commitMailing List;Patch;Third Party Advisory
-
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
PuTTY Change LogRelease Notes;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html
[SECURITY] [DLA 3794-1] putty security update
-
https://www.debian.org/security/2023/dsa-5588
Debian -- Security Information -- DSA-5588-1 putty
-
https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa
git.tartarus.org Git
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