high
7.8
CWE
125
Advisory Published
Updated
Advisory Published

CVE-2021-30939: Apple macOS ImageIO DDS File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

First published: Tue Aug 24 2021(Updated: )

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing a maliciously crafted image may lead to arbitrary code execution.

Credit: Mickey Jin @patch1t Trend MicroJaewon Min Cisco TalosRui Yang Xingwei Lin Ant Security Light cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Apple macOS<11.6.2
11.6.2
tvOS<15.2
15.2
macOS Catalina
Apple iOS, iPadOS, and watchOS<8.3
8.3
macOS<12.1
12.1
macOS
Apple iOS and iPadOS<15.2
15.2
Apple iOS, iPadOS, and macOS<15.2
15.2
Apple iOS, iPadOS, and macOS<15.2
iPhone OS<15.2
Apple iOS and macOS>=10.15<10.15.7
Apple iOS and macOS=10.15.7
Apple iOS and macOS=10.15.7-security_update_2020-001
Apple iOS and macOS=10.15.7-security_update_2020-005
Apple iOS and macOS=10.15.7-security_update_2020-007
Apple iOS and macOS=10.15.7-security_update_2021-001
Apple iOS and macOS=10.15.7-security_update_2021-002
Apple iOS and macOS=10.15.7-security_update_2021-003
Apple iOS and macOS=10.15.7-security_update_2021-004
Apple iOS and macOS=10.15.7-security_update_2021-005
Apple iOS and macOS=10.15.7-security_update_2021-006
Apple iOS and macOS=10.15.7-security_update_2021-007
macOS>=11.0<11.6.2
macOS>=12.0<12.1
tvOS<15.2
Apple iOS, iPadOS, and watchOS<8.3

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2021-30939?

    CVE-2021-30939 is a vulnerability in Apple macOS that allows remote attackers to disclose sensitive information.

  • How severe is CVE-2021-30939?

    CVE-2021-30939 has a severity rating of 7.8 (high).

  • Which software versions are affected by CVE-2021-30939?

    CVE-2021-30939 affects Apple macOS Monterey 12.1, tvOS 15.2, watchOS 8.3, macOS Big Sur 11.6.2, iOS 15.2, and iPadOS 15.2.

  • How can CVE-2021-30939 be exploited?

    Exploiting CVE-2021-30939 requires interaction with the ImageIO library, and the attack vectors may vary depending on the implementation.

  • Are there any remediation steps available for CVE-2021-30939?

    Yes, Apple has released security updates to address CVE-2021-30939. Please refer to the official Apple advisory for more information.

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