Vulnerability Monitor

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CVE-2020-9015

Arista DCS-7050QX-32S-R 4.20.9M, DCS-7050CX3-32S-R 4.20.11M, and DCS-7280SRAM-48C6-R 4.22.0.1F devices (and possibly other products) allow attackers to bypass intended TACACS+ shell restrictions via a | character. NOTE: the vendor reports that this is a configuration issue relating to an overly permissive regular expression in the TACACS+ server permitted commands

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 6 products from arista, from arista, from arista and 3 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-02-20T22:15:12.177

Last Modified

2024-11-21T05:39:49.993

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	arista	dcs-7050qx-32s-r_firmware	4.20.9m	Yes
Hardware	arista	dcs-7050qx-32s-r	-	No
Operating System	arista	dcs-7050cx3-32s-r_firmware	4.20.11m	Yes
Hardware	arista	dcs-7050cx3-32s-r	-	No
Operating System	arista	dcs-7280sram-48c6-r_firmware	4.22.0.1f	Yes
Hardware	arista	dcs-7280sram-48c6-r	-	No

References

http://packetstormsecurity.com/files/158119/Arista-Restricted-Shell-Escape-Privilege-Escalation.html ([email protected])
https://eos.arista.com/arista-eos-is-not-vulnerable-to-cve-2020-9015/ ([email protected])
https://securitybytes.me Third Party Advisory ([email protected])
https://securitybytes.me/posts/cve-2020-9015/ Broken Link ([email protected])
http://packetstormsecurity.com/files/158119/Arista-Restricted-Shell-Escape-Privilege-Escalation.html (af854a3a-2127-422b-91ae-364da2661108)
https://eos.arista.com/arista-eos-is-not-vulnerable-to-cve-2020-9015/ (af854a3a-2127-422b-91ae-364da2661108)
https://securitybytes.me Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://securitybytes.me/posts/cve-2020-9015/ Broken Link (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For arista's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.