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freebsdFreeBSD2383767C-D224-11E8-9623-A4BADB2F4699
HistoryOct 16, 2018 - 12:00 a.m.

libssh -- authentication bypass vulnerability

2018-10-1600:00:00
vuxml.freebsd.org
498

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

0.136

Percentile

95.7%

gladiac reports:

libssh versions 0.6 and above have an authentication bypass
vulnerability in the server code. By presenting the server an
SSH2_MSG_USERAUTH_SUCCESS message in place of the
SSH2_MSG_USERAUTH_REQUEST message which the server would expect to
initiate authentication, the attacker could successfully authentciate
without any credentials.

OSVersionArchitecturePackageVersionFilename
FreeBSDanynoarchlibssh= 0.6UNKNOWN
FreeBSDanynoarchlibssh< 0.7.6UNKNOWN

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

0.136

Percentile

95.7%