CVE-2020-14002 — Observable Discrepancy in Putty

CWE-203 — Observable DiscrepancyCWE-200 — Sensitive Information Exposure9 documents6 sources
Severity
5.9MEDIUMNVD
EPSS
0.7%
top 26.91%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
PuttyDebian PuttyFedoraproject Fedora
Timeline
PublishedJun 29
Latest updateMay 24

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 vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 2.2 | Impact: 3.6

Affected Packages3 packages

▶debiandebian/putty< putty 0.74-1 (bookworm)
▶Debianputty/putty< 0.74-1+3
▶NVDputty/putty0.68 — 0.73

Also affects: Fedora 31, 32

🔴Vulnerability Details

3
GHSA
GHSA-f25w-hjcw-x829: PuTTY 0↗2022-05-24
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OSV
CVE-2020-14002: PuTTY 0↗2020-06-29
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CVEList
CVE-2020-14002: PuTTY 0↗2020-06-29
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📋Vendor Advisories

1
Debian
CVE-2020-14002: putty - PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information ...↗2020
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💬Community

4
Bugzilla
CVE-2020-14002 putty: Observable Discrepancy leading to an information leak in the algorithm negotiation↗2020-06-30
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Bugzilla
CVE-2020-14002 putty: Observable Discrepancy leading to an information leak in the algorithm negotiation [fedora-all]↗2020-06-30
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Bugzilla
CVE-2020-14002 putty: Observable Discrepancy leading to an information leak in the algorithm negotiation [epel-7]↗2020-06-30
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Bugzilla
CVE-2020-14002 putty: Observable Discrepancy leading to an information leak in the algorithm negotiation [epel-6]↗2020-06-30
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