high
7.8
CWE
20 787
Advisory Published
CVE Published
Updated

CVE-2021-30743: Input Validation

First published: Mon Apr 26 2021(Updated: )

An out-of-bounds write was addressed with improved input validation. This issue is fixed in iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. Processing a maliciously crafted image may lead to arbitrary code execution.

Credit: CFF Topsec Alpha Teaman anonymous researcher Jeonghoon Shin @singi21a THEORI working with Trend Micro Zero Day InitiativeYe Zhang @co0py_Cat Baidu SecurityJzhu Trend Micro Zero Day InitiativeXingwei Lin Ant Security Light product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple macOS<11.3
11.3
tvOS<14.5
14.5
macOS Catalina
Apple iOS, iPadOS, and watchOS<14.5
14.5
Apple iOS, iPadOS, and watchOS<14.5
14.5
Apple iOS, iPadOS, and watchOS<7.4
7.4
Apple iOS, iPadOS, and watchOS<14.5
iOS<14.5
Apple iOS and macOS=10.15
Apple iOS and macOS=10.15.1
Apple iOS and macOS=10.15.2
Apple iOS and macOS=10.15.3
Apple iOS and macOS=10.15.4
Apple iOS and macOS=10.15.5
Apple iOS and macOS=10.15.6
Apple iOS and macOS=10.15.6
Apple iOS and macOS=10.15.6-supplemental_update
Apple iOS and macOS=10.15.7
Apple iOS and macOS=10.15.7
Apple iOS and macOS=10.15.7-security_update_2020
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-supplemental_update
Apple iOS and macOS>=11.0.1<11.3
tvOS<14.5
Apple iOS, iPadOS, and watchOS<7.4

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2021-30743.

  • What is the title of this vulnerability?

    The title of this vulnerability is "ImageIO. An out-of-bounds write was addressed with improved input validation."

  • What is the description of this vulnerability?

    The description of this vulnerability is "ImageIO. Processing a maliciously crafted image may lead to arbitrary code execution."

  • Which software are affected by this vulnerability?

    The software affected by this vulnerability are Apple iOS up to and excluding version 14.5, Apple iPadOS up to and excluding version 14.5, Apple watchOS up to and excluding version 7.4, Apple macOS Big Sur up to and excluding version 11.3, Apple Catalina, and Apple tvOS up to and excluding version 14.5.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability on the following references: [link1](https://support.apple.com/en-us/HT212530), [link2](https://support.apple.com/en-us/HT212317), [link3](https://support.apple.com/en-us/HT212324).

  • What is the Common Weakness Enumeration (CWE) ID for this vulnerability?

    The Common Weakness Enumeration (CWE) ID for this vulnerability is 20.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203