Vulnerability Details : CVE-2021-28509
Potential exploit
This advisory documents the impact of an internally found vulnerability in Arista EOS state streaming telemetry agent TerminAttr and OpenConfig transport protocols. The impact of this vulnerability is that, in certain conditions, TerminAttr might leak MACsec sensitive data in clear text in CVP to other authorized users, which could cause MACsec traffic to be decrypted or modified by other authorized users on the device.
Products affected by CVE-2021-28509
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*
- cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*
- cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28509
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 31 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28509
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
3.6
|
LOW | AV:N/AC:H/Au:S/C:P/I:P/A:N |
3.9
|
4.9
|
NIST | |
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N |
0.9
|
5.2
|
NIST | |
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N |
0.9
|
5.2
|
Arista Networks, Inc. |
CWE ids for CVE-2021-28509
-
Assigned by: psirt@arista.com (Secondary)
-
The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-28509
-
https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077
Security Advisory 0077 - AristaExploit;Vendor Advisory
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