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Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2021-36368

An issue was discovered in OpenSSH before 8.9. If a client is using public-key authentication with agent forwarding but without -oLogLevel=verbose, and an attacker has silently modified the server to support the None authentication option, then the user cannot determine whether FIDO authentication is going to confirm that the user wishes to connect to that server, or that the user wishes to allow that server to connect to a different server on the user's behalf. NOTE: the vendor's position is "this is not an authentication bypass, since nothing is being bypassed.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.004

EPSS Ranking 58.1%

CVSS Severity

CVSS v3 Score 3.7

CVSS v2 Score 2.6

References

Products affected by CVE-2021-36368

Openbsd » Openssh » Version: N/A

cpe:2.3:a:openbsd:openssh:-
Openbsd » Openssh » Version: 1.2

cpe:2.3:a:openbsd:openssh:1.2
Openbsd » Openssh » Version: 1.2.1

cpe:2.3:a:openbsd:openssh:1.2.1
Openbsd » Openssh » Version: 1.2.2

cpe:2.3:a:openbsd:openssh:1.2.2
Openbsd » Openssh » Version: 1.2.27

cpe:2.3:a:openbsd:openssh:1.2.27
Openbsd » Openssh » Version: 1.2.3

cpe:2.3:a:openbsd:openssh:1.2.3
Openbsd » Openssh » Version: 1.3

cpe:2.3:a:openbsd:openssh:1.3
Openbsd » Openssh » Version: 1.5

cpe:2.3:a:openbsd:openssh:1.5
Openbsd » Openssh » Version: 1.5.7

cpe:2.3:a:openbsd:openssh:1.5.7
Openbsd » Openssh » Version: 1.5.8

cpe:2.3:a:openbsd:openssh:1.5.8
Openbsd » Openssh » Version: 2

cpe:2.3:a:openbsd:openssh:2
Openbsd » Openssh » Version: 2.1

cpe:2.3:a:openbsd:openssh:2.1
Openbsd » Openssh » Version: 2.1.0

cpe:2.3:a:openbsd:openssh:2.1.0
Openbsd » Openssh » Version: 2.1.1

cpe:2.3:a:openbsd:openssh:2.1.1
Openbsd » Openssh » Version: 2.2

cpe:2.3:a:openbsd:openssh:2.2
Openbsd » Openssh » Version: 2.2.0

cpe:2.3:a:openbsd:openssh:2.2.0
Openbsd » Openssh » Version: 2.3

cpe:2.3:a:openbsd:openssh:2.3
Openbsd » Openssh » Version: 2.3.0

cpe:2.3:a:openbsd:openssh:2.3.0
Openbsd » Openssh » Version: 2.3.1

cpe:2.3:a:openbsd:openssh:2.3.1
Openbsd » Openssh » Version: 2.5

cpe:2.3:a:openbsd:openssh:2.5
Openbsd » Openssh » Version: 2.5.1

cpe:2.3:a:openbsd:openssh:2.5.1
Openbsd » Openssh » Version: 2.5.2

cpe:2.3:a:openbsd:openssh:2.5.2
Openbsd » Openssh » Version: 2.9

cpe:2.3:a:openbsd:openssh:2.9
Openbsd » Openssh » Version: 2.9.9

cpe:2.3:a:openbsd:openssh:2.9.9
Openbsd » Openssh » Version: 2.9.9p2

cpe:2.3:a:openbsd:openssh:2.9.9p2
Openbsd » Openssh » Version: 2.9p1

cpe:2.3:a:openbsd:openssh:2.9p1
Openbsd » Openssh » Version: 2.9p2

cpe:2.3:a:openbsd:openssh:2.9p2
Openbsd » Openssh » Version: 3.0

cpe:2.3:a:openbsd:openssh:3.0
Openbsd » Openssh » Version: 3.0.1

cpe:2.3:a:openbsd:openssh:3.0.1
Openbsd » Openssh » Version: 3.0.1p1

cpe:2.3:a:openbsd:openssh:3.0.1p1
Openbsd » Openssh » Version: 3.0.2

cpe:2.3:a:openbsd:openssh:3.0.2
Openbsd » Openssh » Version: 3.0.2p1

cpe:2.3:a:openbsd:openssh:3.0.2p1
Openbsd » Openssh » Version: 3.0p1

cpe:2.3:a:openbsd:openssh:3.0p1
Openbsd » Openssh » Version: 3.1

cpe:2.3:a:openbsd:openssh:3.1
Openbsd » Openssh » Version: 3.1p1

cpe:2.3:a:openbsd:openssh:3.1p1
Openbsd » Openssh » Version: 3.2

cpe:2.3:a:openbsd:openssh:3.2
Openbsd » Openssh » Version: 3.2.2

cpe:2.3:a:openbsd:openssh:3.2.2
Openbsd » Openssh » Version: 3.2.2p1

cpe:2.3:a:openbsd:openssh:3.2.2p1
Openbsd » Openssh » Version: 3.2.3

cpe:2.3:a:openbsd:openssh:3.2.3
Openbsd » Openssh » Version: 3.2.3p1

cpe:2.3:a:openbsd:openssh:3.2.3p1
Openbsd » Openssh » Version: 3.3

cpe:2.3:a:openbsd:openssh:3.3
Openbsd » Openssh » Version: 3.3p1

cpe:2.3:a:openbsd:openssh:3.3p1
Openbsd » Openssh » Version: 3.4

cpe:2.3:a:openbsd:openssh:3.4
Openbsd » Openssh » Version: 3.4p1

cpe:2.3:a:openbsd:openssh:3.4p1
Openbsd » Openssh » Version: 3.5

cpe:2.3:a:openbsd:openssh:3.5
Openbsd » Openssh » Version: 3.5p1

cpe:2.3:a:openbsd:openssh:3.5p1
Openbsd » Openssh » Version: 3.6

cpe:2.3:a:openbsd:openssh:3.6
Openbsd » Openssh » Version: 3.6.1

cpe:2.3:a:openbsd:openssh:3.6.1
Openbsd » Openssh » Version: 3.6.1p1

cpe:2.3:a:openbsd:openssh:3.6.1p1
Openbsd » Openssh » Version: 3.6.1p2

cpe:2.3:a:openbsd:openssh:3.6.1p2
Openbsd » Openssh » Version: 3.7

cpe:2.3:a:openbsd:openssh:3.7
Openbsd » Openssh » Version: 3.7.1

cpe:2.3:a:openbsd:openssh:3.7.1
Openbsd » Openssh » Version: 3.7.1p1

cpe:2.3:a:openbsd:openssh:3.7.1p1
Openbsd » Openssh » Version: 3.7.1p2

cpe:2.3:a:openbsd:openssh:3.7.1p2
Openbsd » Openssh » Version: 3.8

cpe:2.3:a:openbsd:openssh:3.8
Openbsd » Openssh » Version: 3.8.1

cpe:2.3:a:openbsd:openssh:3.8.1
Openbsd » Openssh » Version: 3.8.1p1

cpe:2.3:a:openbsd:openssh:3.8.1p1
Openbsd » Openssh » Version: 3.9

cpe:2.3:a:openbsd:openssh:3.9
Openbsd » Openssh » Version: 3.9.1

cpe:2.3:a:openbsd:openssh:3.9.1
Openbsd » Openssh » Version: 3.9.1p1

cpe:2.3:a:openbsd:openssh:3.9.1p1
Openbsd » Openssh » Version: 4.0

cpe:2.3:a:openbsd:openssh:4.0
Openbsd » Openssh » Version: 4.0p1

cpe:2.3:a:openbsd:openssh:4.0p1
Openbsd » Openssh » Version: 4.1

cpe:2.3:a:openbsd:openssh:4.1
Openbsd » Openssh » Version: 4.1p1

cpe:2.3:a:openbsd:openssh:4.1p1
Openbsd » Openssh » Version: 4.2

cpe:2.3:a:openbsd:openssh:4.2
Openbsd » Openssh » Version: 4.2p1

cpe:2.3:a:openbsd:openssh:4.2p1
Openbsd » Openssh » Version: 4.3

cpe:2.3:a:openbsd:openssh:4.3
Openbsd » Openssh » Version: 4.3p1

cpe:2.3:a:openbsd:openssh:4.3p1
Openbsd » Openssh » Version: 4.3p2

cpe:2.3:a:openbsd:openssh:4.3p2
Openbsd » Openssh » Version: 4.4

cpe:2.3:a:openbsd:openssh:4.4
Openbsd » Openssh » Version: 4.4p1

cpe:2.3:a:openbsd:openssh:4.4p1
Openbsd » Openssh » Version: 4.5

cpe:2.3:a:openbsd:openssh:4.5
Openbsd » Openssh » Version: 4.6

cpe:2.3:a:openbsd:openssh:4.6
Openbsd » Openssh » Version: 4.7

cpe:2.3:a:openbsd:openssh:4.7
Openbsd » Openssh » Version: 4.7p1

cpe:2.3:a:openbsd:openssh:4.7p1
Openbsd » Openssh » Version: 4.8

cpe:2.3:a:openbsd:openssh:4.8
Openbsd » Openssh » Version: 4.9

cpe:2.3:a:openbsd:openssh:4.9
Openbsd » Openssh » Version: 5.0

cpe:2.3:a:openbsd:openssh:5.0
Openbsd » Openssh » Version: 5.1

cpe:2.3:a:openbsd:openssh:5.1
Openbsd » Openssh » Version: 5.2

cpe:2.3:a:openbsd:openssh:5.2
Openbsd » Openssh » Version: 5.3

cpe:2.3:a:openbsd:openssh:5.3
Openbsd » Openssh » Version: 5.4

cpe:2.3:a:openbsd:openssh:5.4
Openbsd » Openssh » Version: 5.5

cpe:2.3:a:openbsd:openssh:5.5
Openbsd » Openssh » Version: 5.6

cpe:2.3:a:openbsd:openssh:5.6
Openbsd » Openssh » Version: 5.7

cpe:2.3:a:openbsd:openssh:5.7
Openbsd » Openssh » Version: 5.8

cpe:2.3:a:openbsd:openssh:5.8
Openbsd » Openssh » Version: 5.8p2

cpe:2.3:a:openbsd:openssh:5.8p2
Openbsd » Openssh » Version: 5.9

cpe:2.3:a:openbsd:openssh:5.9
Openbsd » Openssh » Version: 6.0

cpe:2.3:a:openbsd:openssh:6.0
Openbsd » Openssh » Version: 6.1

cpe:2.3:a:openbsd:openssh:6.1
Openbsd » Openssh » Version: 6.2

cpe:2.3:a:openbsd:openssh:6.2
Openbsd » Openssh » Version: 6.3

cpe:2.3:a:openbsd:openssh:6.3
Openbsd » Openssh » Version: 6.4

cpe:2.3:a:openbsd:openssh:6.4
Openbsd » Openssh » Version: 6.5

cpe:2.3:a:openbsd:openssh:6.5
Openbsd » Openssh » Version: 6.6

cpe:2.3:a:openbsd:openssh:6.6
Openbsd » Openssh » Version: 6.7

cpe:2.3:a:openbsd:openssh:6.7
Openbsd » Openssh » Version: 6.8

cpe:2.3:a:openbsd:openssh:6.8
Openbsd » Openssh » Version: 6.9

cpe:2.3:a:openbsd:openssh:6.9
Openbsd » Openssh » Version: 7.0

cpe:2.3:a:openbsd:openssh:7.0
Openbsd » Openssh » Version: 7.1

cpe:2.3:a:openbsd:openssh:7.1
Openbsd » Openssh » Version: 7.2

cpe:2.3:a:openbsd:openssh:7.2
Openbsd » Openssh » Version: 7.3

cpe:2.3:a:openbsd:openssh:7.3
Openbsd » Openssh » Version: 7.4

cpe:2.3:a:openbsd:openssh:7.4
Openbsd » Openssh » Version: 7.5

cpe:2.3:a:openbsd:openssh:7.5
Openbsd » Openssh » Version: 7.6

cpe:2.3:a:openbsd:openssh:7.6
Openbsd » Openssh » Version: 7.7

cpe:2.3:a:openbsd:openssh:7.7
Openbsd » Openssh » Version: 7.8

cpe:2.3:a:openbsd:openssh:7.8
Openbsd » Openssh » Version: 7.9

cpe:2.3:a:openbsd:openssh:7.9
Openbsd » Openssh » Version: 8.0

cpe:2.3:a:openbsd:openssh:8.0
Openbsd » Openssh » Version: 8.1

cpe:2.3:a:openbsd:openssh:8.1
Openbsd » Openssh » Version: 8.2

cpe:2.3:a:openbsd:openssh:8.2
Openbsd » Openssh » Version: 8.3

cpe:2.3:a:openbsd:openssh:8.3
Openbsd » Openssh » Version: 8.4

cpe:2.3:a:openbsd:openssh:8.4
Openbsd » Openssh » Version: 8.5

cpe:2.3:a:openbsd:openssh:8.5
Openbsd » Openssh » Version: 8.6

cpe:2.3:a:openbsd:openssh:8.6
Openbsd » Openssh » Version: 8.7

cpe:2.3:a:openbsd:openssh:8.7
Openbsd » Openssh » Version: 8.8

cpe:2.3:a:openbsd:openssh:8.8
Debian » Debian Linux » Version: 10.0

cpe:2.3:o:debian:debian_linux:10.0
Debian » Debian Linux » Version: 11.0

cpe:2.3:o:debian:debian_linux:11.0
Debian » Debian Linux » Version: 9.0

cpe:2.3:o:debian:debian_linux:9.0

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2021-36368

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