Vulnerability in Arista 7050cx3-32s
CVE-2021-28511
This advisory documents the impact of an internally found vulnerability in Arista EOS for security ACL bypass. The impact of this vulnerability is that the security ACL drop rule might be bypassed if a NAT ACL rule filter with permit action matches the packet flow. This could allow a host with an IP address in a range that matches the range allowed by a NAT ACL and a range denied by a Security ACL to be forwarded incorrectly as it should have been denied by the Security ACL. This can enable an ACL bypass.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
Weakness classification (CWE)
References
- www.arista.com/en/support/advisories-notices/security-advisory/15862-security-a… (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-28511?
- CVE-2021-28511 is a medium-severity vulnerability in Arista 7050cx3-32s, classified under Improper Access Control. CVSS score: 5.8/10. Published 2022-08-05.
- How severe is CVE-2021-28511?
- Medium severity. CVSS v3 base score is 5.8 out of 10.