5.3med
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…
Published 5 y ago · modified 4 mo ago · JSON
CVSS
5.3
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
5.3%
percentile 93%
Public exploits
0
none known
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
CISA SSVC assessment
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction (EPSS)
5.33% probability of exploitation in the next 30 days, higher than 93% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Classification
- Weakness
- CWE-203 Observable Discrepancy
References
- github.com /openssh/openssh-portable/pull/270 · x_refsource_MISC, x_transferred
- github.com /openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L26 · x_refsource_MISC, x_transferred, exploit
- utcc.utoronto.ca /~cks/space/blog/tech/SSHKeysAreInfoLeak · x_refsource_MISC, x_transferred
- rushter.com /blog/public-ssh-keys/ · x_refsource_MISC, x_transferred
- security.netapp.com /advisory/ntap-20211014-0005/ · x_refsource_CONFIRM, x_transferred
- github.com /openssh/openssh-portable/pull/270#issuecomment-920577097 · x_refsource_MISC, x_transferred
- openwall.com /lists/oss-security/2018/08/24/1 · x_refsource_MISC, x_transferred
- github.com /openssh/openssh-portable/pull/270#issuecomment-943909185 · x_refsource_MISC, x_transferred
Sources
- CVE List: CVE-2016-20012
- NVD: CVE-2016-20012
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