CVE-2024-29988MicrosoftOperating systemsApril 30, 2024

Microsoft SmartScreen Prompt Security Feature Bypass Vulnerability

High 8.8Actively exploited

Description

Microsoft SmartScreen Prompt contains a security feature bypass vulnerability that allows an attacker to bypass the Mark of the Web (MotW) feature. This vulnerability can be chained with CVE-2023-38831 and CVE-2024-21412 to execute a malicious file.

What to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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Details

Vendor
Microsoft
Product
SmartScreen
CVE
CVE-2024-29988
Affected versions
Windows 10 Version 1809 10.0: from 10.0.17763.0 to 10.0.17763.5696 (excluded); from 10.0.0 to 10.0.17763.5696 (excluded) — fixed in 10.0.17763.5696
Windows Server 2019 10.0: from 10.0.17763.0 to 10.0.17763.5696 (excluded) — fixed in 10.0.17763.5696
Windows Server 2019 (Server Core installation) 10.0: from 10.0.17763.0 to 10.0.17763.5696 (excluded) — fixed in 10.0.17763.5696
Windows Server 2022 10.0: from 10.0.20348.0 to 10.0.20348.2402 (excluded) — fixed in 10.0.20348.2402
Windows 11 version 21H2 10.0: from 10.0.0 to 10.0.22000.2899 (excluded) — fixed in 10.0.22000.2899
Windows 10 Version 21H2 10.0: from 10.0.19043.0 to 10.0.19044.4291 (excluded) — fixed in 10.0.19044.4291
Windows 11 version 22H2 10.0: from 10.0.22621.0 to 10.0.22621.3447 (excluded) — fixed in 10.0.22621.3447
Windows 10 Version 22H2 10.0: from 10.0.19045.0 to 10.0.19045.4291 (excluded) — fixed in 10.0.19045.4291
Windows 11 version 22H3 10.0: from 10.0.22631.0 to 10.0.22631.3447 (excluded) — fixed in 10.0.22631.3447
Windows 11 Version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.3447 (excluded) — fixed in 10.0.22631.3447
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0: from 10.0.25398.0 to 10.0.25398.830 (excluded) — fixed in 10.0.25398.830 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
8.8
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
May 21, 2024 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
April 30, 2024

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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