CVE-2016-20012

moderate-risk
Published 2021-09-15

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

Do I need to act?

!
14.6% chance of exploitation in next 30 days
EPSS score — higher than 85% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (5)

Affected Vendors

Openbsd Netapp

References (16)

Exploit https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cb...
Patch https://github.com/openssh/openssh-portable/pull/270
Issue Tracking https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097
Issue Tracking https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185
Exploit https://rushter.com/blog/public-ssh-keys/
Third Party Advisory https://security.netapp.com/advisory/ntap-20211014-0005/
Third Party Advisory https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak
Mailing List https://www.openwall.com/lists/oss-security/2018/08/24/1
Exploit https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cb...
Patch https://github.com/openssh/openssh-portable/pull/270
Issue Tracking https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097
Issue Tracking https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185
Exploit https://rushter.com/blog/public-ssh-keys/
Third Party Advisory https://security.netapp.com/advisory/ntap-20211014-0005/
Third Party Advisory https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak
Mailing List https://www.openwall.com/lists/oss-security/2018/08/24/1
45
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 12/34 · Low
Exposure 12/34 · Low