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SecurityPkg/DxeImageVerificationLib: plug Data leak in IsForbiddenByDbx() (CVE-2019-14575)

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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1608

If the second GetVariable() call for "dbx" fails, in IsForbiddenByDbx(),
we have to free Data. Jump to "Done" for that.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Laszlo Ersek 2019-09-25 13:41:57 +02:00 committed by mergify[bot]
parent 5cd8be6079
commit cb30c8f251
1 changed files with 1 additions and 1 deletions
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2
SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
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@ -1274,7 +1274,7 @@ IsForbiddenByDbx (
Status = gRT->GetVariable (EFI_IMAGE_SECURITY_DATABASE1, &gEfiImageSecurityDatabaseGuid, NULL, &DataSize, (VOID *) Data);
if (EFI_ERROR (Status)) {
return IsForbidden;
goto Done;
}
//