CVE-2020-9015 : What You Need to Know

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. This CVE has been disputed.

Understanding CVE-2020-9015

This CVE involves a vulnerability in Arista network devices that could potentially allow unauthorized access.

What is CVE-2020-9015?

Arista DCS-7050QX-32S-R, DCS-7050CX3-32S-R, and DCS-7280SRAM-48C6-R devices are susceptible to a security issue that enables attackers to circumvent TACACS+ shell restrictions using a specific character.

The Impact of CVE-2020-9015

The vulnerability could lead to unauthorized access and compromise the security of affected Arista devices.

Technical Details of CVE-2020-9015

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability allows attackers to bypass intended TACACS+ shell restrictions by exploiting a specific character.

Affected Systems and Versions

Arista DCS-7050QX-32S-R 4.20.9M
Arista DCS-7050CX3-32S-R 4.20.11M
Arista DCS-7280SRAM-48C6-R 4.22.0.1F

Exploitation Mechanism

Attackers can exploit an overly permissive regular expression in the TACACS+ server permitted commands to bypass shell restrictions.

Mitigation and Prevention

Protecting systems from CVE-2020-9015 is crucial to maintaining security.

Immediate Steps to Take

Monitor vendor updates and security advisories regularly.
Implement network segmentation to limit the impact of potential breaches.
Review and adjust TACACS+ server configurations to enhance security.

Long-Term Security Practices

Conduct regular security audits and penetration testing.
Educate users on secure practices and awareness of social engineering tactics.

Patching and Updates

Apply patches and updates provided by Arista promptly to address the vulnerability.