Vulnerability Details : CVE-2016-20012
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
Products affected by CVE-2016-20012
- cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
Threat overview for CVE-2016-20012
Top countries where our scanners detected CVE-2016-20012
Top open port discovered on systems with this issue
22
IPs affected by CVE-2016-20012 28,331,238
Threat actors abusing to this issue?
Yes
Find out if you* are
affected by CVE-2016-20012!
*Directly or indirectly through your vendors, service providers and 3rd parties.
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attack surface intelligence
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Exploit prediction scoring system (EPSS) score for CVE-2016-20012
0.52%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-20012
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:N |
8.6
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
NIST |
References for CVE-2016-20012
-
https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185
CVE-2016-20012 - Publickey Information leak - Only allow SSH_MSG_USERAUTH_REQUEST with signature by manfred-kaiser · Pull Request #270 · openssh/openssh-portable · GitHubIssue Tracking;Third Party Advisory
-
https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265
openssh-portable/auth2-pubkey.c at d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd · openssh/openssh-portable · GitHubExploit;Third Party Advisory
-
https://github.com/openssh/openssh-portable/pull/270
Publickey User Enumeration - Only allow SSH_MSG_USERAUTH_REQUEST with signature by manfred-kaiser · Pull Request #270 · openssh/openssh-portable · GitHubPatch;Third Party Advisory
-
https://www.openwall.com/lists/oss-security/2018/08/24/1
oss-security - About OpenSSH "user enumeration" / CVE-2018-15473Mailing List;Third Party Advisory
-
https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak
Chris's Wiki :: blog/tech/SSHKeysAreInfoLeakThird Party Advisory
-
https://security.netapp.com/advisory/ntap-20211014-0005/
CVE-2016-20012 OpenSSH Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
-
https://rushter.com/blog/public-ssh-keys/
Public SSH keys can leak your private infrastructure | Artem GolubinExploit;Third Party Advisory
-
https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097
CVE-2016-20012 - Publickey Information leak - Only allow SSH_MSG_USERAUTH_REQUEST with signature by manfred-kaiser · Pull Request #270 · openssh/openssh-portable · GitHubIssue Tracking;Third Party Advisory
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