CVE-2016-20012 (GCVE-0-2016-20012)

Vulnerability from cvelistv5 – Published: 2021-09-15 19:32 – Updated: 2026-05-29 15:38 Disputed
VLAI
Summary
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-29 15:38 UTC
CWE
  • n/a
  • CWE-203 - Observable Discrepancy
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2329 records in the last 180 days details
References
Show details on NVD website
To clipboard 

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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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