CVE-2020-14002

MEDIUM EPSS 86.3%
Published Jun 29, 20206y ago · Modified Jun 17, 20262w ago
5.9 CVSS 3.1
Medium
Find Similar
Published Jun 29, 2020 6y ago
Last Modified Jun 17, 2026 2w ago

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).

CVSS Details

Base Score
5.9
Exploitability
2.2
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
86.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-203

Affected Products 4

VendorProductVersionRange
puttyputty*≥0.68  –  ≤0.73
netapponcommand_unified_manager_core_package*any
fedoraprojectfedora31any
fedoraprojectfedora32any

References 7

  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26TACCSQYYCPWAJYNAUIXJGZ5RGORJZV/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JPV4A77EDCT4BTFO5BE26ZH72BG4E5IJ/
  • lists.tartarus.org https://lists.tartarus.org/pipermail/putty-announce/
    Third Party Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20200717-0003/
    Third Party Advisory
  • chiark.greenend.org.uk https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
    Release NotesThird Party Advisory
  • fzi.de https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.