A vulnerability was found in libssh's server-side state machine. A malicious client could create channels without first performing authentication, resulting in unauthorized access.
Find out more about CVE-2018-10933 from the MITRE CVE dictionary dictionary and NIST NVD.
This vulnerability affects libssh shipped in Red Hat Enterprise Linux 7 Extras. No libssh packages are included in Red Hat Enterprise Linux 6 and earlier. This issue does not affect libssh4 or openssh.
This issue can only be affect applications that use libssh to implement an SSH server; SSH client functionality is not affected. No packages in Red Hat products use libssh to implement an SSH server. Therefore, no package from Red Hat that uses the libssh library is affected by this flaw.
The libssh library is available for customer or third party code to use. Such code that is linked against libssh and uses the ssh_bind* functions may be affected by this flaw.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 9.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | libssh4 | Not affected |
| Red Hat Enterprise Linux 7 | libssh | Affected |
| Red Hat Enterprise Linux 6 | libssh4 | Not affected |
Vulmon