NVD Vulnerability Detail
Search Exploit, PoC
CVE-2021-33626
Summary

A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.

Publication Date Oct. 1, 2021, 12:15 p.m.
Registration Date Oct. 1, 2021, 4 p.m.
Last Update Nov. 21, 2024, 3:09 p.m.
CVSS3.1 : HIGH
スコア 7.8
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV) ローカル
攻撃条件の複雑さ(AC) 低
攻撃に必要な特権レベル(PR) 低
利用者の関与(UI) 不要
影響の想定範囲(S) 変更なし
機密性への影響(C) 高
完全性への影響(I) 高
可用性への影響(A) 高
CVSS2.0 : MEDIUM
Score 4.6
Vector AV:L/AC:L/Au:N/C:P/I:P/A:P
攻撃元区分(AV) ローカル
攻撃条件の複雑さ(AC) 低
攻撃前の認証要否(Au) 不要
機密性への影響(C) 低
完全性への影響(I) 低
可用性への影響(A) 低
Get all privileges. いいえ
Get user privileges いいえ
Get other privileges いいえ
User operation required いいえ
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.3 5.34.44
Configuration2 or higher or less more than less than
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.2 5.25.44
Configuration3 or higher or less more than less than
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.1 5.16.25
Configuration4 or higher or less more than less than
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.4 5.42.44
Configuration5 or higher or less more than less than
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.3 5.35.25
Configuration6 or higher or less more than less than
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.2 5.26.25
Configuration7 or higher or less more than less than
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.4 5.43.25
Configuration8 or higher or less more than less than
cpe:2.3:o:siemens:ruggedcom_apr1808_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:ruggedcom_apr1808:-:*:*:*:*:*:*:*
Configuration9 or higher or less more than less than
cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:*
Configuration10 or higher or less more than less than
cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:*
Configuration11 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:*
Configuration12 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:*
Configuration13 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:*
Configuration14 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:*
Configuration15 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:*
Configuration16 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:*
Configuration17 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:*
Configuration18 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc477e_pro:-:*:*:*:*:*:*:*
Configuration19 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:*
Configuration20 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:*
Configuration21 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:*
Configuration22 or higher or less more than less than
cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:*
Configuration23 or higher or less more than less than
cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:*
execution environment
1 cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
InsydeH2O における信頼できない制御領域からの機能の組み込みに関する脆弱性
Title InsydeH2O における信頼できない制御領域からの機能の組み込みに関する脆弱性
Summary

InsydeH2O には、信頼できない制御領域からの機能の組み込みに関する脆弱性が存在します。

Possible impacts 情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
Solution

ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date Sept. 30, 2021, midnight
Registration Date Feb. 17, 2022, 10:51 a.m.
Last Update Feb. 28, 2022, 4:09 p.m.
Affected System
Insyde Software
InsydeH2O 
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
その他
Change Log
No Changed Details Date of change
1 [2022年02月17日]
  掲載		 Feb. 17, 2022, 10:51 a.m.
2 [2022年02月28日]
  参考情報：JVN (JVNVU#98748974) を追加		 Feb. 28, 2022, 2:16 p.m.