CVE-2009-4128
GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2009-4128- CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2009-4128- Updated
- 2026-11-02
EUVDEUVD-2009-4098 No score
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.
- Record
EUVD-2009-4098- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-prgr-9xf7-v9fw No score
GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with...
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.
- Record
GHSA-prgr-9xf7-v9fw- Weakness
- CWE-287
- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2009-4128- Updated
- 2026-11-02
OSVDEBIAN-CVE-2009-4128 No score
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.
- Record
DEBIAN-CVE-2009-4128- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-4128 is a high vulnerability (CVSS 7.2) in Gnu Grub 2, published December 1, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. Fixed in grub2 1.97+20091115-1.