Copy Fail (copy.fail)

Article summary

A Linux vulnerability known as 'Copy Fail' has been discovered, allowing an attacker to gain root access to a system with a simple exploit. The vulnerability affects most Linux distributions shipped since 2017 and can be exploited with a Python script. The issue is due to a logic flaw in the kernel's crypto API and can be mitigated by updating the kernel package or disabling the affected module. A patch is available and has been included in some distributions' kernel packages.

Main themes

• Linux vulnerability
• Kernel exploit
• Security patch
• Crypto API
• Linux distributions
• Exploit mitigation

What commenters say

• The naming of vulnerabilities like 'Copy Fail' is a marketing gimmick, but it helps to raise awareness and make the issue more memorable.
• The vulnerability is a significant threat, especially for shared hosting services and multi-tenant Linux hosts, as it allows an attacker to gain root access with minimal effort.
• Disabling the affected module or updating the kernel package can effectively mitigate the vulnerability, with minimal impact on system performance.
• The use of catchy names for vulnerabilities like 'Copy Fail' is prosocial and helps to facilitate discussion and patching, rather than being a purely marketing-driven effort.
• The exploit is not specific to Python and can be shipped as binary code without dependencies, making it a more general threat to Linux systems.
• Some commenters believe that the naming of vulnerabilities is unnecessary and that using CVE numbers would be sufficient, while others argue that names like 'Copy Fail' are more memorable and helpful.
• The patch for the vulnerability has been included in some distributions' kernel packages, but the exact version numbers and availability vary, and users should check their distribution's status to ensure they are protected.