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CVE-2020-14002

Date: June 28, 2020

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).

Severity Score

Related Resources (14)

https://security.alpinelinux.org/vuln/CVE-2020-14002
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JPV4A77EDCT4BTFO5BE26ZH72BG4E5IJ/
https://lists.tartarus.org/pipermail/putty-announce/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-14002
https://nvd.nist.gov/vuln/detail/CVE-2020-14002
https://security-tracker.debian.org/tracker/CVE-2020-14002
https://lists.debian.org/debian-lts-announce/2024/04/msg00016.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.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26TACCSQYYCPWAJYNAUIXJGZ5RGORJZV/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/26TACCSQYYCPWAJYNAUIXJGZ5RGORJZV/
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JPV4A77EDCT4BTFO5BE26ZH72BG4E5IJ/
https://security.netapp.com/advisory/ntap-20200717-0003/
https://www.mend.io/vulnerability-database/CVE-2020-14002

Severity Score

Weakness Type (CWE)

Exposure of Sensitive Information to an Unauthorized Actor

CWE-200

Observable Discrepancy

CWE-203

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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