Vulnerability · Published Jun 29, 2020 · Assigned by mitre
CVE-2020-14002
Medium 5.9
In plain English
A medium-severity security flaw in the putty package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.1% (higher than 88% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.9Medium
Exploit odds (30 days)3.1%top 12.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | putty | 0.74-r0 | ALPINE-CVE-2020-14002 |
| Alpine:v3.21 | putty | 0.74-r0 | ALPINE-CVE-2020-14002 |
| Alpine:v3.22 | putty | 0.74-r0 | ALPINE-CVE-2020-14002 |
| Alpine:v3.23 | putty | 0.74-r0 | ALPINE-CVE-2020-14002 |
| Alpine:v3.24 | putty | 0.74-r0 | ALPINE-CVE-2020-14002 |
| Debian:12 | putty | 0.74-1 | DEBIAN-CVE-2020-14002 |
| Debian:13 | putty | 0.74-1 | DEBIAN-CVE-2020-14002 |
| Debian:14 | putty | 0.74-1 | DEBIAN-CVE-2020-14002 |
Affected products (as reported)
References
- https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- https://lists.tartarus.org/pipermail/putty-announce/
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
- FEDORA-2020-35442ce9b7 vendor-advisory
- FEDORA-2020-f4dba093f1 vendor-advisory
- https://security.netapp.com/advisory/ntap-20200717-0003/
- [debian-lts-announce] 20240425 [SECURITY] [DLA 3794-1] putty security update mailing-list