What it is about

Arista Extensible Operating System (EOS) ist ein modulares Linux basiertes Netzwerkbetriebssystem. Ein Angreifer kann mehrere Schwachstellen in Arista EOS ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren und offenzulegen oder einen Denial-of-Service-Zustand auszulösen.

Under what conditions?

The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.

What can happen in the worst case

An attacker could use the vulnerability to

• Sicherheitsvorkehrungen zu umgehen
• Daten zu manipulieren
• offenzulegen oder einen Denial-of-Service-Zustand auszulösen

Am I affected?

Affected according to the BSI:

• Arista EOS <4.36.2F
• Arista EOS <4.36.1F
• Arista EOS <4.35.6M
• Arista EOS <4.34.8M
• Arista EOS <4.33.9M
• Arista EOS <4.34.7.1M
• Arista EOS <4.33.10M

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

• Arista EOS 4.36.2F
• Arista EOS 4.36.1F
• Arista EOS 4.35.6M
• Arista EOS 4.34.8M
• Arista EOS 4.33.9M
• Arista EOS 4.34.7.1M
• Arista EOS 4.33.10M

Is the vulnerability already being exploited?

None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.