First published: Fri Jan 14 2022(Updated: )
An issue has recently been discovered in Arista EOS where the incorrect use of EOS's AAA API’s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.
Credit: psirt@arista.com psirt@arista.com
Affected Software | Affected Version | How to fix |
---|---|---|
Arista EOS | <4.20 | |
Arista EOS | >=4.21.0<=4.21.14m | |
Arista EOS | >=4.22.0<=4.22.11m | |
Arista EOS | >=4.23.0<=4.23.8m | |
Arista EOS | >=4.24.6.0<=4.24.6m | |
Arista EOS | >=4.25.0<=4.25.4m | |
Arista EOS | >=4.26.0<=4.26.1f |
The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Artista recommends customers move to the latest version of each release that contains all the fixes listed below. CVE-2021-28500 has been fixed in the following releases: 4.26.2F and later releases in the 4.26.x train 4.25.5M and later releases in the 4.25.x train 4.25.4.1M and later releases in the 4.25.4.x train 4.24.7M and later releases in the 4.24.x train 4.23.9M and later releases in the 4.23.x train 4.22.12M and later releases in the 4.22.x train 4.21.15M and later releases in the 4.21.x train
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CVE-2021-28500 is a vulnerability in Arista EOS where the incorrect use of EOS's AAA API’s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with no password configuration.
CVE-2021-28500 affects Arista EOS by allowing local users with nopassword configuration to gain unrestricted access to the device due to the incorrect use of EOS's AAA API’s by the OpenConfig and TerminAttr agents.
CVE-2021-28500 has a severity rating of critical (7.8).
Arista EOS versions 4.20 up to exclusive version 4.26.1f are affected by CVE-2021-28500.
To fix CVE-2021-28500, it is recommended to update Arista EOS to a version that is not affected by the vulnerability.