| Package | Affected versions | Patched versions |
|---|---|---|
| xen | = 3.0.3= 3.3.0= 3.3.1 |
The pyGrub boot loader in Xen 3.0.3, 3.3.0, and Xen-3.3.1 does not support the password option in grub.conf for para-virtualized guests, which allows attackers with access to the para-virtualized guest console to boot the guest or modify the guest's kernel boot parameters without providing the expected password.
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