CVE-2018-10933 Auth bypass in libssh
A malicious client can bypass authentication in libssh server to create channels and gain unauthorized access to the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-10933?
CVE-2018-10933 is a critical authentication bypass vulnerability in Canonical Ubuntu Linux, published on 17 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.
Which versions are affected by CVE-2018-10933?
It affects 9 products.
Linux distribution packages (14)
cockpit Red Hat:rhel_extras_other:7 | All versions | 0:176-4.el7 |
cockpit-dashboard Red Hat:rhel_extras_other:7 | All versions | 0:176-4.el7 |
cockpit-docker Red Hat:rhel_extras_other:7 | All versions | 0:176-4.el7 |
cockpit-machines Red Hat:rhel_extras_other:7 | All versions | 0:176-4.el7 |
cockpit-packagekit Red Hat:rhel_extras_other:7 | All versions | 0:176-4.el7 |
cockpit-pcp Red Hat:rhel_extras_other:7 | All versions | 0:176-4.el7 |
cockpit-storaged Red Hat:rhel_extras_other:7 | All versions | 0:176-4.el7 |
libssh Red Hat:rhel_extras_other:7 | All versions | 0:0.7.1-7.el7 |
libssh-debuginfo Red Hat:rhel_extras_other:7 | All versions | 0:0.7.1-7.el7 |
libssh-devel Red Hat:rhel_extras_other:7 | All versions | 0:0.7.1-7.el7 |
libssh SUSE:Linux Enterprise Desktop 12 SP3 | All versions | 0.6.3-12.6.1 |
libssh SUSE:Linux Enterprise Module for Basesystem 15 | All versions | 0.7.5-6.3.1 |
libssh SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 0.6.3-12.6.1 |
libssh SUSE:Linux Enterprise Workstation Extension 12 SP3 | All versions | 0.6.3-12.6.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Libssh Libssh, Netapp Oncommand Unified Manager, Netapp Oncommand Workflow Automation, Netapp Snapcenter and 3 more.
How do I fix CVE-2018-10933?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2018-10933 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-10933 exists.
Public exploit code: 1 Metasploit module, 2 Exploit-DB entries and 39 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2018-10933, DEBIAN-CVE-2018-10933, DLA-1548-1, DSA-4322-1, GHSA-22gf-f5w4-hrfq, MGASA-2019-0043 and 5 more.