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CVE-2022-40261 An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in…

Description

An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in System Management Mode - an environment more privileged than operating system (OS) and completely isolated from it. Running arbitrary code in SMM additionally bypasses SMM-based SPI flash protections against modifications, which can help an attacker to install a firmware backdoor/implant into BIOS. Such a malicious firmware code in BIOS could persist across operating system re-installs. Additionally, this vulnerability potentially could be used by malicious actors to bypass security mechanisms provided by UEFI firmware (for example, Secure Boot and some types of memory isolation for hypervisors). This issue affects: Module name: OverClockSmiHandler SHA256: a204699576e1a48ce915d9d9423380c8e4c197003baf9d17e6504f0265f3039c Module GUID: 4698C2BD-A903-410E-AD1F-5EEF3A1AE422

Produits et versions touchés

Produit Versions touchées Corrigé en
Aptio 5.x Pas de correctif indiqué

Références

Chronologie

  1. Publiée
  2. Dernière modification

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CVE-2022-40262 A potential attacker can execute an arbitrary code at the time of the PEI phase and influence the subsequent boot stages 8.2 Élevée CVE-2022-40250 An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in… 8.8 Élevée CVE-2022-40246 A potential attacker can write one byte by arbitrary address at the time of the PEI phase (only during S3 resume boot… 7.2 Élevée CVE-2022-26873 A potential attacker can execute an arbitrary code at the time of the PEI phase and influence the subsequent boot stages 8.2 Élevée
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