QID 43998

Date Published: 2023-03-28

QID 43998: Arista EOS eAPI certificate Based Authentication Vulnerability (SA0072)

Arista EOS is the Worlds Most Advanced Network Operating System.

Arista EOS is a fully programmable and highly modular, Linux-based network operation system, using familiar industry-standard CLI, and runs a single binary software image across the Arista switching family.

eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.

Affected EOS versions:
4.26.2 and below releases in the 4.26.x train
4.25.5 and below releases in the 4.25.x train
4.24.7 and below releases in the 4.24.x train
4.23.9 and below releases in the 4.23.x train
All releases in 4.22.x train
QID Detection Logic (Authenticated):
The check matches Arista EOS version retrieved via Unix Auth using "show version" command.

Successful exploitation could allows remote attackers to access the device via eAPI.

CVSS V3 rated as Critical - 9.8 severity.

CVSS V2 rated as High - 6.8 severity.

Solution

Refer to Arista Security Advisory SA0072 for patch details.

Vendor References

13605-security-advisory-0072 - www.arista.com/en/support/advisories-notices/security-advisory/13605-security-advisory-0072

CVEs related to QID 43998

CVE-2021-28503 |

Software Advisories

Advisory ID	Software	Component	Link
13605-security-advisory-0072			www.arista.com/en/support/advisories-notices/security-advisory/13605-security-advisory-0072

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