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From 0dac937f2845a1bc4943a0cfed3392d35afba733 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Tue, 8 Jun 2021 14:12:51 +0200
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Subject: [PATCH 02/10] NetworkPkg/IScsiDxe: simplify
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"ISCSI_CHAP_AUTH_DATA.InChallenge" size
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Laszlo Ersek <lersek@redhat.com>
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RH-MergeRequest: 5: NetworkPkg/IScsiDxe: fix IScsiHexToBin() security and functionality bugs [rhel-8.5.0, post-rebase]
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RH-Commit: [2/10] 8b57211651e13185a636daa5369993054bd7334b
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RH-Bugzilla: 1956408
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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The ISCSI_CHAP_AUTH_MAX_LEN macro is defined with value 1024.
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The usage of this macro currently involves a semantic (not functional)
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bug, which we're going to fix in a subsequent patch, eliminating
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ISCSI_CHAP_AUTH_MAX_LEN altogether.
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For now, remove the macro's usage from all
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"ISCSI_CHAP_AUTH_DATA.InChallenge" contexts. This is doable without
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duplicating open-coded constants.
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No changes in functionality.
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Cc: Jiaxin Wu <jiaxin.wu@intel.com>
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Cc: Maciej Rabeda <maciej.rabeda@linux.intel.com>
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Cc: Philippe Mathieu-Daud <philmd@redhat.com>
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Cc: Siyuan Fu <siyuan.fu@intel.com>
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Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3356
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Reviewed-by: Philippe Mathieu-Daud <philmd@redhat.com>
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Reviewed-by: Maciej Rabeda <maciej.rabeda@linux.intel.com>
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Message-Id: <20210608121259.32451-3-lersek@redhat.com>
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(cherry picked from commit 29cab43bb7912a12efa5a78dac15394aee866e4c)
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---
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NetworkPkg/IScsiDxe/IScsiCHAP.c | 2 +-
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NetworkPkg/IScsiDxe/IScsiCHAP.h | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.c b/NetworkPkg/IScsiDxe/IScsiCHAP.c
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index cbbc56ae5b..df3c2eb120 100644
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--- a/NetworkPkg/IScsiDxe/IScsiCHAP.c
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+++ b/NetworkPkg/IScsiDxe/IScsiCHAP.c
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@@ -289,7 +289,7 @@ IScsiCHAPOnRspReceived (
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}
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AuthData->InIdentifier = (UINT32) Result;
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- AuthData->InChallengeLength = ISCSI_CHAP_AUTH_MAX_LEN;
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+ AuthData->InChallengeLength = (UINT32) sizeof (AuthData->InChallenge);
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IScsiHexToBin (
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(UINT8 *) AuthData->InChallenge,
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&AuthData->InChallengeLength,
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diff --git a/NetworkPkg/IScsiDxe/IScsiCHAP.h b/NetworkPkg/IScsiDxe/IScsiCHAP.h
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index 5e59fb678b..1fc1d96ea3 100644
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--- a/NetworkPkg/IScsiDxe/IScsiCHAP.h
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+++ b/NetworkPkg/IScsiDxe/IScsiCHAP.h
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@@ -49,7 +49,7 @@ typedef struct _ISCSI_CHAP_AUTH_CONFIG_NVDATA {
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typedef struct _ISCSI_CHAP_AUTH_DATA {
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ISCSI_CHAP_AUTH_CONFIG_NVDATA *AuthConfig;
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UINT32 InIdentifier;
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- UINT8 InChallenge[ISCSI_CHAP_AUTH_MAX_LEN];
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+ UINT8 InChallenge[1024];
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UINT32 InChallengeLength;
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//
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// Calculated CHAP Response (CHAP_R) value.
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--
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2.27.0
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