VulnerabilityModified
CVE-2021-28510
For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart.
HIGH 7.5EPSS 1.00%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.00%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.00% probability · 61th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-1284
- Affected
- arista/eos
- Source
- psirt@arista.com
References
- https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076Exploit, Mitigation, Vendor Advisory
- https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076Exploit, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.