Arista products update for OpenSSH regreSSHion attack

1) Race condition

EUVDB-ID: #VU93513

Risk: High

CVSSv4.0: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2024-6387

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition in portable version of sshd. A remote non-authenticated attacker can send a series of requests in order to trigger a race condition and execute arbitrary code on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Arista Wireless Access Points: before 16.1.0-51.1004

Arista NDR: before 5.2.3

Arista Extensible Operating System (EOS): before

CPE2.3

• cpe:2.3:h:arista:arista_wireless_access_points:*:*:*:*:*:*:*:*
• cpe:2.3:a:arista:arista_ndr:*:*:*:*:*:*:*:*
• cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*

External links

https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.