On October 16, local time, libssh officially released an update to fix the server-side identity authentication bypass vulnerability (CVE-2018-10933) existing in libssh 0.6 and later versions. 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 authenticate without any credentials.
CVSS V3.0 base score: 9.8
CVSS vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- libssh version >= 0.6
- libssh version < 0.8.4
- libssh version < 0.7.6
- libssh version = 0.8.4, 0.7.6
libssh has released unaffected versions. Affected users are advised to upgrade their products as soon as possible. The new unaffected versions libssh 0.0.4 and 0.7.6 can be downloaded from the following link: https://www.libssh.org/files/
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