CVE-2021-28496: In Arista's EOS software affected releases, the shared secret profiles sensitive configuration might be leaked when displaying output over eAPI or other JSON outputs to authenticated users on the device.

Published Oct 21, 2021
·
Updated

On systems running Arista EOS and CloudEOS with the affected release version, when using shared secret profiles the password configured for use by BiDirectional Forwarding Detection (BFD) will be leaked when displaying output over eAPI or other JSON outputs to other authenticated users on the device. The affected EOS Versions are: all releases in 4.22.x train, 4.23.9 and below releases in the 4.23.x train, 4.24.7 and below releases in the 4.24.x train, 4.25.4 and below releases in the 4.25.x train, 4.26.1 and below releases in the 4.26.x train

Affected Software

5 affected components
Arista EOS>=4.22<=4.22.7m
Arista EOS>=4.23<4.23.10
Arista EOS>=4.24<4.24.8
Arista EOS>=4.25<4.25.5
Arista EOS>=4.26<4.26.2

Remediation

Information

The recommended resolution is to upgrade to a remediated software version at your earliest convenience. The vulnerability is fixed in the following EOS versions: 4.23.10 and later releases 4.24.8 and later releases 4.25.5 and later releases 4.26.2 and later releases

Information

For an immediate remediation until EOS can be upgraded, a hotfix SWIX is available to be installed as EOS extension to fix the issue. Release versions: 4.22.0 - 4.25.0 URL: https://www.arista.com/assets/data/SecurityAdvisories/SA69/SecurityAdvisory0069Hotfix-4.22-4.25.0.swix SWIX hash: (SHA512)36fc77d7ff5de2aacfff822bac4e054137a5ebf7d54f283cd4d4be05f15a2c1e448245080e0be11122831bb672d1d777724a8bcbbf029e32a3611d6002e2cf10 Release versions: 4.25.1 - 4.26.1 URL: https://www.arista.com/assets/data/SecurityAdvisories/SA69/SecurityAdvisory0069Hotfix-4.25.1-4.26.1.swix SWIX hash: (SHA512)c8d5a8ab801c7e45dbc0f062f738f3af72084b451a7734c5607a884d648d88b37d7a8451d09dd0a051728199f4b6b0c0bef76b5c3862a668298410cbce55e085

Event History

Oct 21, 2021
CVE Published
via MITRE·04:41 PM
Data Sourced
via MITRE·04:41 PM
RemedyDescriptionSeverityWeakness

Frequently Asked Questions

1

What is the vulnerability ID of this security issue?

The vulnerability ID of this security issue is CVE-2021-28496.

2

What software is affected by this vulnerability?

Systems running Arista EOS and CloudEOS with the affected release versions are affected.

3

What is the severity level of CVE-2021-28496?

The severity level of CVE-2021-28496 is medium (6.5).

4

How can the password leakage be exploited?

The password configured for use by BiDirectional Forwarding Detection (BFD) can be leaked when displaying output over eAPI or other JSON outputs to other authenticated users on the device.

5

How can I fix CVE-2021-28496?

Apply the necessary patches or updates provided by Arista to fix CVE-2021-28496.

Company

Resources

Contact

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