CVE-2020-14002
Published: 29 June 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).
Priority
Status
| Package | Release | Status |
|---|---|---|
|
putty Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Needs triage
|
|
| groovy |
Not vulnerable
(0.74-1)
|
|
| hirsute |
Not vulnerable
(0.74-1)
|
|
| impish |
Not vulnerable
(0.74-1)
|
|
| jammy |
Not vulnerable
(0.74-1)
|
|
| kinetic |
Not vulnerable
(0.74-1)
|
|
| lunar |
Not vulnerable
(0.74-1)
|
|
| mantic |
Not vulnerable
(0.74-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(0.74-1)
|
|
| xenial |
Needs triage
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
References
- https://lists.tartarus.org/pipermail/putty-announce/
- 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://www.cve.org/CVERecord?id=CVE-2020-14002
- NVD
- Launchpad
- Debian