High severity · published Jan 26, 2023
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
7.5
CVSS
1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
Eos · Arista
before 4.23.10; 4.24.0 before 4.24.8; 4.25.0 before 4.25.6; 4.26.0 before 4.26.4; 4.27.0 before 4.27.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28510
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28510
Exploit
https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076
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