CVEvulnerability
CVE-2016-20012
5.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-09-15
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-203
Description
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
Affected configurations
• openbsd openssh (<= 8.7)
• netapp clustered data ontap
• netapp hci management node
• netapp ontap select deploy administration utility
• netapp solidfire
Related
Weakness · CWE (1)
- CWE-203 Observable Discrepancy weakness
References
- https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265 Exploit, Third Party Advisory
- https://github.com/openssh/openssh-portable/pull/270 Patch, Third Party Advisory
- https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097 Issue Tracking, Third Party Advisory
- https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185 Issue Tracking, Third Party Advisory
- https://rushter.com/blog/public-ssh-keys/ Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211014-0005/ Third Party Advisory
- https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak Third Party Advisory
- https://www.openwall.com/lists/oss-security/2018/08/24/1 Mailing List, Third Party Advisory
- https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265 Exploit, Third Party Advisory
- https://github.com/openssh/openssh-portable/pull/270 Patch, Third Party Advisory
- https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097 Issue Tracking, Third Party Advisory
- https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185 Issue Tracking, Third Party Advisory
- https://rushter.com/blog/public-ssh-keys/ Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211014-0005/ Third Party Advisory
- https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak Third Party Advisory
- https://www.openwall.com/lists/oss-security/2018/08/24/1 Mailing List, Third Party Advisory
- https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265 Exploit, Third Party Advisory