medium
5.5
CWE
22
Advisory Published
CVE Published
Updated

CVE-2020-27896: Path Traversal

First published: Thu Nov 12 2020(Updated: )

A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.0.1. A remote attacker may be able to modify the file system.

Credit: an anonymous researcher product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple macOS<11.0.1
11.0.1
Apple macOS<11.1
11.1
macOS Catalina
macOS Mojave
Apple iOS and macOS>=10.14.0<10.14.6
Apple iOS and macOS>=10.15.0<10.15.7
Apple iOS and macOS=10.14.6
Apple iOS and macOS=10.14.6-security_update_2019-001
Apple iOS and macOS=10.14.6-security_update_2019-002
Apple iOS and macOS=10.14.6-security_update_2019-004
Apple iOS and macOS=10.14.6-security_update_2019-005
Apple iOS and macOS=10.14.6-security_update_2019-006
Apple iOS and macOS=10.14.6-security_update_2019-007
Apple iOS and macOS=10.14.6-security_update_2020-001
Apple iOS and macOS=10.14.6-security_update_2020-002
Apple iOS and macOS=10.14.6-security_update_2020-003
Apple iOS and macOS=10.14.6-security_update_2020-004
Apple iOS and macOS=10.14.6-security_update_2020-005
Apple iOS and macOS=10.14.6-security_update_2020-006
Apple iOS and macOS=10.15.7
Apple iOS and macOS=10.15.7-security_update_2020
Apple iOS and macOS>=11.0<11.0.1

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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-2020-27896?

    CVE-2020-27896 is a vulnerability in Ruby that involves a path handling issue that has been addressed with improved validation.

  • Which software is affected by CVE-2020-27896?

    CVE-2020-27896 affects macOS Big Sur versions 11.0.1 and 11.1, as well as Apple Catalina and Apple Mojave.

  • How can I fix CVE-2020-27896?

    To fix CVE-2020-27896, update your macOS Big Sur to version 11.0.1 or 11.1, if applicable, or keep your software up to date with the latest patches and updates provided by the vendor.

  • Where can I find more information about CVE-2020-27896?

    You can find more information about CVE-2020-27896 on the official Apple support pages: [Apple Support - HT212011](https://support.apple.com/en-us/HT212011) and [Apple Support - HT211931](https://support.apple.com/en-us/HT211931).

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