CVE-2020-14002MEDIUM
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Description
PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client).
References
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
Details
Source: MITRE
Published: 2020-06-29
Updated: 2021-07-21
Type: CWE-200
Risk Information
CVSS v2
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
CVSS v3
Base Score: 5.9
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 2.2
Severity: MEDIUM
Vulnerable Software
Configuration 1
OR
cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:* versions from 0.68 to 0.73 (inclusive)
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 138244 | Fedora 31 : putty (2020-f4dba093f1) | Nessus | Fedora Local Security Checks | medium |
| 138235 | Fedora 32 : putty (2020-35442ce9b7) | Nessus | Fedora Local Security Checks | medium |
| 137870 | FreeBSD : PuTTY -- Release 0.74 fixes two security vulnerabilities (6190c0cd-b945-11ea-9401-2dcf562daa69) | Nessus | FreeBSD Local Security Checks | medium |