CVE-2020-14002

MEDIUM

PuTTY 0.68-0.73 - Information Leak via Algorithm Negotiation

Title source: llm

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 (7)

Core 7

Core References

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26TACCSQYYCPWAJYNAUIXJGZ5RGORJZV/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JPV4A77EDCT4BTFO5BE26ZH72BG4E5IJ/

Mailing List mailing-list

https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html

Third Party Advisory

https://lists.tartarus.org/pipermail/putty-announce/

Third Party Advisory

https://security.netapp.com/advisory/ntap-20200717-0003/

Release Notes, Third Party Advisory

https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html

Third Party Advisory

https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/

Scores

CVSS v3 5.9

EPSS 0.0075

EPSS Percentile 73.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE

CWE-203

Status published

Products (4)

fedoraproject/fedora 31

fedoraproject/fedora 32

netapp/oncommand_unified_manager_core_package

putty/putty 0.68 - 0.73

Published Jun 29, 2020

Tracked Since Feb 18, 2026