Vulnerabilities > CVE-2020-14002 - Information Exposure Through Discrepancy vulnerability in multiple products
Attack vector
NETWORK Attack complexity
HIGH Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
NONE Summary
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).
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 6 | |
| Application | 1 | |
| OS | 2 |
Common Weakness Enumeration (CWE)
References
- https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
- https://lists.tartarus.org/pipermail/putty-announce/
- https://security.netapp.com/advisory/ntap-20200717-0003/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26TACCSQYYCPWAJYNAUIXJGZ5RGORJZV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JPV4A77EDCT4BTFO5BE26ZH72BG4E5IJ/