MdeModulePkg/Variable: TcgMorLockSmm Key Mismatch changes lock state #4546
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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4410 Inside TcgMorLockSmm.c, the SetVariableCheckHandlerMorLock() function contains a scenario to prevent a possible dictionary attack on the MorLock Key in accordance with the TCG Platform Reset Mitigation Spec v1.10. The mechanism to prevent this attack must also change the MorLock Variable Value to 0x01 to indicate Locked Without Key. ASSERT_EFI_ERROR is added for error visibility since SetMorLockVariable returns a status code Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Signed-off-by: Abhi Singh <Abhi.Singh@arm.com> Acked-by: Michael Kubacki <michael.kubacki@microsoft.com>
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@lgao4 Hello there, I was wondering if I could get a review on this patch? |
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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4410
Inside TcgMorLockSmm.c, the SetVariableCheckHandlerMorLock() function contains a scenario to prevent a possible dictionary attack on the MorLock Key in accordance with the TCG Platform Reset Mitigation Spec v1.10.
The mechanism to prevent this attack must also change the MorLock Variable Value to 0x01 to indicate Locked Without Key.
ASSERT_EFI_ERROR is added for error visibility since SetMorLockVariable returns a status code
Cc: Jian J Wang jian.j.wang@intel.com
Cc: Liming Gao gaoliming@byosoft.com.cn
Signed-off-by: Abhi Singh Abhi.Singh@arm.com
Acked-by: Michael Kubacki michael.kubacki@microsoft.com
Reviewed-by: Liming Gao gaoliming@byosoft.com.cn