What is CVE-2018-21058?

CVE-2018-21058 is a vulnerability discovered on Samsung mobile devices with N(7.0), O(8.0) software, specifically affecting devices with Exynos 7420 or Exynos 8890/8996 chipsets. Cache attacks can occur against the Keymaster AES-GCM implementation.

What is the severity of CVE-2018-21058?

The severity of CVE-2018-21058 is critical, with a severity value of 9.8.

Which devices are affected by CVE-2018-21058?

Samsung mobile devices with N(7.0), O(8.0) software and Exynos 7420 or Exynos 8890/8996 chipsets are affected by CVE-2018-21058.

How can cache attacks occur in CVE-2018-21058?

Cache attacks can occur in CVE-2018-21058 due to the use of T-Tables instead of the Cryptography Extension (CE) in the Keymaster AES-GCM implementation.

Is there a security update available for CVE-2018-21058?

Yes, Samsung has released a security update for CVE-2018-21058. For more information, you can refer to the Samsung Mobile Security Updates page.

Vulnerability/
CVE-2018-21058

critical

9.8

CWE

327

8/4/2020

5/8/2024

CVE-2018-21058

First published: Wed Apr 08 2020(Updated: )

An issue was discovered on Samsung mobile devices with N(7.0), O(8.0) (exynos7420 or Exynos 8890/8996 chipsets) software. Cache attacks can occur against the Keymaster AES-GCM implementation because T-Tables are used; the Cryptography Extension (CE) is not used. The Samsung ID is SVE-2018-12761 (September 2018).

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Google Android	=7.0
Google Android	=8.0
Samsung Exynos 7420
Samsung Exynos 8890
Samsung Exynos 8996

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Reference Links

https://security.samsungmobile.com/securityUpdate.smsb

Frequently Asked Questions

What is CVE-2018-21058?
CVE-2018-21058 is a vulnerability discovered on Samsung mobile devices with N(7.0), O(8.0) software, specifically affecting devices with Exynos 7420 or Exynos 8890/8996 chipsets. Cache attacks can occur against the Keymaster AES-GCM implementation.
What is the severity of CVE-2018-21058?
The severity of CVE-2018-21058 is critical, with a severity value of 9.8.
Which devices are affected by CVE-2018-21058?
Samsung mobile devices with N(7.0), O(8.0) software and Exynos 7420 or Exynos 8890/8996 chipsets are affected by CVE-2018-21058.
How can cache attacks occur in CVE-2018-21058?
Cache attacks can occur in CVE-2018-21058 due to the use of T-Tables instead of the Cryptography Extension (CE) in the Keymaster AES-GCM implementation.
Is there a security update available for CVE-2018-21058?
Yes, Samsung has released a security update for CVE-2018-21058. For more information, you can refer to the Samsung Mobile Security Updates page.

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version/google android/7.0
version/google android/8.0
vendor/samsung
canonical/samsung exynos 7420
canonical/samsung exynos 8890
canonical/samsung exynos 8996

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