Use of insufficiently random values in keypair - CVE-2021-41117

Vulnerability details

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to an error in the pseudo-random number generator used by keypair to generate RSA keys for SSH connections. A remote attacker can generate duplicate SSH keys and gain unauthorized access to the affected systems.

Affected software

How to mitigate CVE-2021-41117

Install updates from vendor's website.

Note, just installing an update is not enough to fix the problem. You need to replace all previously generated SSH keys.

Links to Public Exploits and PoC-codes

• Exploit #10399 - keypairvuln (Private keys generated with vulnerable keypair versions (CVE-2021-41117)) (August 16, 2024)

External References

• https://github.com/juliangruber/keypair/security/advisories/GHSA-3f99-hvg4-qjwj
• https://securitylab.github.com/advisories/GHSL-2021-1012-keypair/

Related Security Bulletins

• Use of insufficiently random values for RSA keys generation in keypair
• GitKraken update for keypair