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ITACS 5211: Introduction to Ethical Hacking

Wade Mackey

LibSSH Flaw Allows Hackers to Take Over Servers Without Password

October 17, 2018 by Raaghav Sharma Leave a Comment

A four-year-old severe vulnerability has been discovered in the Secure Shell (SSH) implementation library known as Libssh that could allow anyone to completely bypass authentication and gain unfettered administrative control over a vulnerable server without requiring a password.
The security vulnerability, tracked as CVE-2018-10933, is an authentication-bypass issue that was introduced in Libssh version 0.6 released earlier 2014, leaving thousands of enterprise servers open to hackers for the last four years.

According to a security advisory published Tuesday, all an attacker needs to do is sending an “SSH2_MSG_USERAUTH_SUCCESS” message to a server with an SSH connection enabled when it expects an “SSH2_MSG_USERAUTH_REQUEST” message.

https://thehackernews.com/2018/10/libssh-ssh-protocol-library.html

Filed Under: Week 06: Sniffers Tagged With:

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Weekly Discussions

  • Uncategorized (14)
  • Week 01: Overview (7)
  • Week 02: TCP/IP and Network Architecture (18)
  • Week 03: Reconnaisance (17)
  • Week 04: Vulnerability Scanning (19)
  • Week 05: System and User Enumeration (17)
  • Week 06: Sniffers (17)
  • Week 07: NetCat and HellCat (15)
  • Week 08: Social Engineering, Encoding and Encryption (21)
  • Week 09: Malware (14)
  • Week 10: Web Application Hacking (17)
  • Week 11: SQL Injection (15)
  • Week 12: Web Services (25)
  • Week 13: Evasion Techniques (8)
  • Week 14: Review of all topics (15)

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