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.
First published: Thu 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
Credit: psirt@arista.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 |
Remedy
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
Remedy
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
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this security issue?
The vulnerability ID of this security issue is CVE-2021-28496.
What software is affected by this vulnerability?
Systems running Arista EOS and CloudEOS with the affected release versions are affected.
What is the severity level of CVE-2021-28496?
The severity level of CVE-2021-28496 is medium (6.5).
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.
How can I fix CVE-2021-28496?
Apply the necessary patches or updates provided by Arista to fix CVE-2021-28496.
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- vendor/arista
- canonical/arista eos
- version/arista eos/4.22
- version/arista eos/4.22.7m
- version/arista eos/4.23
- version/arista eos/4.24
- version/arista eos/4.25
- version/arista eos/4.26