medium
5.5
CWE
22
Advisory Published
CVE Published
Updated

CVE-2021-1739: Path Traversal

First published: Mon Apr 26 2021(Updated: )

A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. A local user may be able to modify protected parts of the file system.

Credit: Zhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Tencent Security Xuanwu LabYuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Tencent Security Xuanwu LabYuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Tencent Security Xuanwu LabYuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu LabZhipeng Huo @R3dF09 Yuebin Sun @yuebinsun2020 Tencent Security Xuanwu Lab product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple iOS<14.5
14.5
Apple iPadOS<14.5
14.5
<7.4
7.4
Apple Catalina
Apple Mojave
Apple iPadOS<14.5
Apple iPhone OS<14.5
Apple Mac OS X>=10.14<=10.14.5
Apple Mac OS X>=10.15<=10.15.5
Apple Mac OS X=10.14.6
Apple Mac OS X=10.14.6-security_update_2019-001
Apple Mac OS X=10.14.6-security_update_2019-002
Apple Mac OS X=10.14.6-security_update_2019-004
Apple Mac OS X=10.14.6-security_update_2019-005
Apple Mac OS X=10.14.6-security_update_2019-006
Apple Mac OS X=10.14.6-security_update_2019-007
Apple Mac OS X=10.14.6-security_update_2020-001
Apple Mac OS X=10.14.6-security_update_2020-002
Apple Mac OS X=10.14.6-security_update_2020-003
Apple Mac OS X=10.14.6-security_update_2020-004
Apple Mac OS X=10.14.6-security_update_2020-005
Apple Mac OS X=10.14.6-security_update_2020-006
Apple Mac OS X=10.14.6-security_update_2020-007
Apple Mac OS X=10.14.6-security_update_2021-001
Apple Mac OS X=10.14.6-security_update_2021-002
Apple Mac OS X=10.15
Apple Mac OS X=10.15.6
Apple Mac OS X=10.15.6-supplemental_update
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7-security_update_2020
Apple Mac OS X=10.15.7-security_update_2020-001
Apple Mac OS X=10.15.7-security_update_2020-005
Apple Mac OS X=10.15.7-security_update_2020-007
Apple Mac OS X=10.15.7-security_update_2021-001
Apple Mac OS X=10.15.7-supplemental_update
Apple macOS>=11.0<11.3
Apple tvOS<14.5
Apple watchOS<7.4

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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-2021-1739?

    CVE-2021-1739 is a vulnerability in Apple iOS, iPadOS, watchOS, macOS, tvOS, and Mojave that allows for a parsing issue in the handling of directory paths, which has been addressed with improved path validation.

  • What is the severity of CVE-2021-1739?

    The severity of CVE-2021-1739 is not specified.

  • Which software versions are affected by CVE-2021-1739?

    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 tvOS up to and excluding version 14.5, Apple Catalina, and Apple Mojave are affected by CVE-2021-1739.

  • How can I fix CVE-2021-1739?

    To fix CVE-2021-1739, update your affected software versions to the specified remedies: iOS version 14.5, iPadOS version 14.5, watchOS version 7.4, macOS Big Sur version 11.3, and tvOS version 14.5.

  • Where can I find more information about CVE-2021-1739?

    You can find more information about CVE-2021-1739 on Apple's support page: [https://support.apple.com/en-us/HT212326](https://support.apple.com/en-us/HT212326).

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