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OpenSSH Issues Emergency Fix for Flaw Letting Long Passwords Bypass SSH Auth on Alpine Linux

The Hacker News
Actively Exploited
LinuxExploitVulnerabilityUpdateCritical

Overview

A serious vulnerability has been discovered in OpenSSH affecting Alpine Linux servers that use the standard openssh-server package. This flaw allows attackers to bypass authentication for accounts that do not require a password, such as those using SSH keys, by using a password that is between 257 and 1,024 bytes long. To exploit this, attackers need network access and the specific username. OpenSSH has deemed the flaw critical and released an emergency update, version 10.6p2, to address the issue. Alpine Linux has also made fixed packages available for users. This vulnerability poses a significant risk to server security, making it crucial for affected users to update immediately.

Key Takeaways

  • Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
  • Affected Systems: Alpine Linux servers using the standard openssh-server package, OpenSSH version 10.6p1 and earlier.
  • Action Required: Update to OpenSSH version 10.
  • Timeline: Newly disclosed

Original Article Summary

Attackers can log in to accounts that have no password, such as SSH key-only accounts, on some Alpine Linux servers running the standard openssh-server package. They need network access to the server, an account name, and a password between 257 and 1,024 bytes long. OpenSSH, which rates the flaw critical, released version 10.6p2 today to block it. Alpine has published fixed packages for every

Impact

Alpine Linux servers using the standard openssh-server package, OpenSSH version 10.6p1 and earlier.

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Update to OpenSSH version 10.6p2 or later; Alpine has published fixed packages.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Linux, Exploit, Vulnerability, and 2 more.

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