Vulnerability Details : CVE-2021-28507
Potential exploit
An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.
Vulnerability category: BypassGain privilege
Products affected by CVE-2021-28507
- 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:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:4.21.0f:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:4.21.1f:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:4.21.3f:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:4.22.0f:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:4.22.1f:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28507
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 25 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28507
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:N/AC:M/Au:S/C:P/I:P/A:N |
6.8
|
4.9
|
NIST | |
|
7.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N |
2.8
|
4.2
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N |
1.2
|
4.2
|
Arista Networks, Inc. |
CWE ids for CVE-2021-28507
-
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.Assigned by: psirt@arista.com (Secondary)
References for CVE-2021-28507
-
https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071
Security Advisory 0071 - AristaExploit;Mitigation;Patch;Vendor Advisory
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