CVE-2009-4128
7.2 · HIGHOverview
CVE-2009-4128 is a high-severity vulnerability affecting gnu grub_2. It was published on December 1, 2009 and has a CVSS 2.0 base score of 7.2 (HIGH).
This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.
Remediation
Check the references section for vendor advisories and patches from gnu. Update grub_2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
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References
Frequently Asked Questions
What is CVE-2009-4128?
CVE-2009-4128 is a high-severity vulnerability affecting gnu grub_2. It was published on December 1, 2009 and has a CVSS 2.0 base score of 7.2 (HIGH).
How severe is CVE-2009-4128?
This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2009-4128?
Check the references section for vendor advisories and patches from gnu. Update grub_2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2009-4128?
CyberStrike's AI-powered security agents can automatically detect CVE-2009-4128 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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