CVEvulnerability

CVE-2021-33626

7.8 HIGH Published 2021-10-01 Modified 2026-08-11 Official page ↗
Status
Modified
Published
2021-10-01
Last modified
2026-08-11
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
CWE-829

Description

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.

Affected configurations

• insyde insydeh2o (>= 5.3 < 5.34.44) • insyde insydeh2o (>= 5.2 < 5.25.44) • insyde insydeh2o (>= 5.1 < 5.16.25) • insyde insydeh2o (>= 5.4 < 5.42.44) • insyde insydeh2o (>= 5.3 < 5.35.25) • insyde insydeh2o (>= 5.2 < 5.26.25) • insyde insydeh2o (>= 5.4 < 5.43.25) • siemens ruggedcom apr1808 firmware • siemens simatic field pg m5 firmware • siemens simatic field pg m6 firmware • siemens simatic ipc127e firmware • siemens simatic ipc227g firmware • siemens simatic ipc277g firmware • siemens simatic ipc327g firmware • siemens simatic ipc377g firmware • siemens simatic ipc427e firmware • siemens simatic ipc477e firmware • siemens simatic ipc477e pro firmware • siemens simatic ipc627e firmware • siemens simatic ipc647e firmware • siemens simatic ipc677e firmware • siemens simatic ipc847e firmware • siemens simatic itp1000 firmware

Related

Weakness · CWE (1)

  • CWE-829 Inclusion of Functionality from Untrusted Control Sphere weakness

References