CVE-2009-4128

Severity: high (CVSS 7.2 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-12-01 · updated 2026-06-16
Weakness: CWE-287

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.

Affected products

GNU Grub 2: 1.97

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555195
http://www.openwall.com/lists/oss-security/2024/01/15/3
http://www.securityfocus.com/bid/36968
https://exchange.xforce.ibmcloud.com/vulnerabilities/54210
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555195
http://www.openwall.com/lists/oss-security/2024/01/15/3
http://www.securityfocus.com/bid/36968
https://exchange.xforce.ibmcloud.com/vulnerabilities/54210

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