From: "Wang, Jian J" <jian.j.wang@intel.com>
To: devel@edk2.groups.io
Cc: Laszlo Ersek <lersek@redhat.com>,
Jiewen Yao <jiewen.yao@intel.com>,
Chao Zhang <chao.b.zhang@intel.com>
Subject: [PATCH v2 08/10] SecurityPkg/DxeImageVerificationLib: plug Data leak in IsForbiddenByDbx()(CVE-2019-14575)
Date: Fri, 14 Feb 2020 15:27:43 +0800 [thread overview]
Message-ID: <20200214072745.1570-9-jian.j.wang@intel.com> (raw)
In-Reply-To: <20200214072745.1570-1-jian.j.wang@intel.com>
From: Laszlo Ersek <lersek@redhat.com>
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>
---
.../Library/DxeImageVerificationLib/DxeImageVerificationLib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
index 470a0d20ef..f20640af68 100644
--- a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
+++ b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
@@ -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;
}
//
--
2.24.0.windows.2
next prev parent reply other threads:[~2020-02-14 7:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-14 7:27 [PATCH v2 00/10] Fix false negative issue in DxeImageVerificationHandler Wang, Jian J
2020-02-14 7:27 ` [PATCH v2 01/10] SecurityPkg/DxeImageVerificationLib: Fix memory leaks(CVE-2019-14575) Wang, Jian J
2020-02-14 7:27 ` [PATCH v2 02/10] SecurityPkg/DxeImageVerificationLib: reject CertStack.CertNumber==0 per DBX(CVE-2019-14575) Wang, Jian J
2020-02-14 7:27 ` [PATCH v2 03/10] SecurityPkg/DxeImageVerificationLib: fix wrong fetch dbx in IsAllowedByDb(CVE-2019-14575) Wang, Jian J
2020-02-14 7:27 ` [PATCH v2 04/10] SecurityPkg/DxeImageVerificationLib: avoid bypass in fetching dbx(CVE-2019-14575) Wang, Jian J
2020-02-14 7:27 ` [PATCH v2 05/10] SecurityPkg/DxeImageVerificationLib: refactor db/dbx fetching code(CVE-2019-14575) Wang, Jian J
2020-02-14 7:27 ` [PATCH v2 06/10] SecurityPkg/DxeImageVerificationLib: Differentiate error/search result (1)(CVE-2019-14575) Wang, Jian J
2020-02-14 7:47 ` Yao, Jiewen
2020-02-14 7:27 ` [PATCH v2 07/10] SecurityPkg/DxeImageVerificationLib: tighten default result(CVE-2019-14575) Wang, Jian J
2020-02-14 7:27 ` Wang, Jian J [this message]
2020-02-14 7:27 ` [PATCH v2 09/10] SecurityPkg/DxeImageVerificationLib: Differentiate error/search result (2)(CVE-2019-14575) Wang, Jian J
2020-02-14 7:27 ` [PATCH v2 10/10] SecurityPkg/DxeImageVerificationLib: change IsCertHashFoundInDatabase name(CVE-2019-14575) Wang, Jian J
2020-02-14 7:46 ` Yao, Jiewen
2020-02-17 7:48 ` [edk2-devel] [PATCH v2 00/10] Fix false negative issue in DxeImageVerificationHandler Laszlo Ersek
2020-02-17 7:51 ` Wang, Jian J
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