CVE-2016-20012

 

Published at: - 15-09-2021 10:15

Last modified: - 18-04-2022 08:06

Total changes: - 6

Description

** DISPUTED ** 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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

 

Verification logic

 

Reference

• https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265
• https://github.com/openssh/openssh-portable/pull/270
• https://rushter.com/blog/public-ssh-keys/
• https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak
• https://security.netapp.com/advisory/ntap-20211014-0005/
• https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185
• https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097
• https://www.openwall.com/lists/oss-security/2018/08/24/1

 

Keywords

NVD

 

CVE-2016-20012

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures