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Vulnerable Software

Vulnerability Details 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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.001

EPSS Ranking 17.7%

CVSS Severity

CVSS v3 Score 5.8

References

Products affected by CVE-2021-28511

Arista » 7050cx3-32s » Version: N/A

cpe:2.3:h:arista:7050cx3-32s:-
Arista » 7050cx3m-32s » Version: N/A

cpe:2.3:h:arista:7050cx3m-32s:-
Arista » 7050sx3-48c8 » Version: N/A

cpe:2.3:h:arista:7050sx3-48c8:-
Arista » 7050sx3-48yc12 » Version: N/A

cpe:2.3:h:arista:7050sx3-48yc12:-
Arista » 7050sx3-48yc8 » Version: N/A

cpe:2.3:h:arista:7050sx3-48yc8:-
Arista » 7050sx3-48yc » Version: N/A

cpe:2.3:h:arista:7050sx3-48yc:-
Arista » 7050sx3-96yc8 » Version: N/A

cpe:2.3:h:arista:7050sx3-96yc8:-
Arista » 7050tx3-48c8 » Version: N/A

cpe:2.3:h:arista:7050tx3-48c8:-
Arista » 720xp-24y6 » Version: N/A

cpe:2.3:h:arista:720xp-24y6:-
Arista » 720xp-24zy4 » Version: N/A

cpe:2.3:h:arista:720xp-24zy4:-
Arista » 720xp-48y6 » Version: N/A

cpe:2.3:h:arista:720xp-48y6:-
Arista » 720xp-48zc2 » Version: N/A

cpe:2.3:h:arista:720xp-48zc2:-
Arista » 720xp-96zc2 » Version: N/A

cpe:2.3:h:arista:720xp-96zc2:-
Arista » 7300x3-32c » Version: N/A

cpe:2.3:h:arista:7300x3-32c:-
Arista » 7300x3-48yc4 » Version: N/A

cpe:2.3:h:arista:7300x3-48yc4:-
Arista » Eos » Version: N/A

cpe:2.3:o:arista:eos:-
Arista » Eos » Version: 4.10.0

cpe:2.3:o:arista:eos:4.10.0
Arista » Eos » Version: 4.10.9

cpe:2.3:o:arista:eos:4.10.9
Arista » Eos » Version: 4.11.0

cpe:2.3:o:arista:eos:4.11.0
Arista » Eos » Version: 4.11.11

cpe:2.3:o:arista:eos:4.11.11
Arista » Eos » Version: 4.12

cpe:2.3:o:arista:eos:4.12
Arista » Eos » Version: 4.12.0

cpe:2.3:o:arista:eos:4.12.0
Arista » Eos » Version: 4.12.9

cpe:2.3:o:arista:eos:4.12.9
Arista » Eos » Version: 4.13

cpe:2.3:o:arista:eos:4.13
Arista » Eos » Version: 4.13.0

cpe:2.3:o:arista:eos:4.13.0
Arista » Eos » Version: 4.13.9

cpe:2.3:o:arista:eos:4.13.9
Arista » Eos » Version: 4.14

cpe:2.3:o:arista:eos:4.14
Arista » Eos » Version: 4.14.0

cpe:2.3:o:arista:eos:4.14.0
Arista » Eos » Version: 4.15

cpe:2.3:o:arista:eos:4.15
Arista » Eos » Version: 4.15.3f

cpe:2.3:o:arista:eos:4.15.3f
Arista » Eos » Version: 4.16

cpe:2.3:o:arista:eos:4.16
Arista » Eos » Version: 4.16.10m

cpe:2.3:o:arista:eos:4.16.10m
Arista » Eos » Version: 4.16.11m

cpe:2.3:o:arista:eos:4.16.11m
Arista » Eos » Version: 4.16.12m

cpe:2.3:o:arista:eos:4.16.12m
Arista » Eos » Version: 4.16.13m

cpe:2.3:o:arista:eos:4.16.13m
Arista » Eos » Version: 4.16.6m

cpe:2.3:o:arista:eos:4.16.6m
Arista » Eos » Version: 4.16.7m

cpe:2.3:o:arista:eos:4.16.7m
Arista » Eos » Version: 4.16.8m

cpe:2.3:o:arista:eos:4.16.8m
Arista » Eos » Version: 4.16.9m

cpe:2.3:o:arista:eos:4.16.9m
Arista » Eos » Version: 4.17

cpe:2.3:o:arista:eos:4.17
Arista » Eos » Version: 4.17.0

cpe:2.3:o:arista:eos:4.17.0
Arista » Eos » Version: 4.17.0f

cpe:2.3:o:arista:eos:4.17.0f
Arista » Eos » Version: 4.17.1.1f

cpe:2.3:o:arista:eos:4.17.1.1f
Arista » Eos » Version: 4.17.1.4f

cpe:2.3:o:arista:eos:4.17.1.4f
Arista » Eos » Version: 4.17.1f

cpe:2.3:o:arista:eos:4.17.1f
Arista » Eos » Version: 4.17.2.1f

cpe:2.3:o:arista:eos:4.17.2.1f
Arista » Eos » Version: 4.17.2f

cpe:2.3:o:arista:eos:4.17.2f
Arista » Eos » Version: 4.17.3f

cpe:2.3:o:arista:eos:4.17.3f
Arista » Eos » Version: 4.17.4m

cpe:2.3:o:arista:eos:4.17.4m
Arista » Eos » Version: 4.17.5.1m

cpe:2.3:o:arista:eos:4.17.5.1m
Arista » Eos » Version: 4.17.5m

cpe:2.3:o:arista:eos:4.17.5m
Arista » Eos » Version: 4.17.6m

cpe:2.3:o:arista:eos:4.17.6m
Arista » Eos » Version: 4.17.7m

cpe:2.3:o:arista:eos:4.17.7m
Arista » Eos » Version: 4.17.8m

cpe:2.3:o:arista:eos:4.17.8m
Arista » Eos » Version: 4.18

cpe:2.3:o:arista:eos:4.18
Arista » Eos » Version: 4.18.0f

cpe:2.3:o:arista:eos:4.18.0f
Arista » Eos » Version: 4.18.1.1f

cpe:2.3:o:arista:eos:4.18.1.1f
Arista » Eos » Version: 4.18.1f

cpe:2.3:o:arista:eos:4.18.1f
Arista » Eos » Version: 4.18.2.1f

cpe:2.3:o:arista:eos:4.18.2.1f
Arista » Eos » Version: 4.18.2f

cpe:2.3:o:arista:eos:4.18.2f
Arista » Eos » Version: 4.18.3.1f

cpe:2.3:o:arista:eos:4.18.3.1f
Arista » Eos » Version: 4.18.3f

cpe:2.3:o:arista:eos:4.18.3f
Arista » Eos » Version: 4.18.4.1f

cpe:2.3:o:arista:eos:4.18.4.1f
Arista » Eos » Version: 4.18.4.2f

cpe:2.3:o:arista:eos:4.18.4.2f
Arista » Eos » Version: 4.18.4f

cpe:2.3:o:arista:eos:4.18.4f
Arista » Eos » Version: 4.19

cpe:2.3:o:arista:eos:4.19
Arista » Eos » Version: 4.19.4m

cpe:2.3:o:arista:eos:4.19.4m
Arista » Eos » Version: 4.20

cpe:2.3:o:arista:eos:4.20
Arista » Eos » Version: 4.20.1

cpe:2.3:o:arista:eos:4.20.1
Arista » Eos » Version: 4.20.15

cpe:2.3:o:arista:eos:4.20.15
Arista » Eos » Version: 4.20.1f

cpe:2.3:o:arista:eos:4.20.1f
Arista » Eos » Version: 4.20.2f

cpe:2.3:o:arista:eos:4.20.2f
Arista » Eos » Version: 4.20.4.1

cpe:2.3:o:arista:eos:4.20.4.1
Arista » Eos » Version: 4.20.5

cpe:2.3:o:arista:eos:4.20.5
Arista » Eos » Version: 4.20.5f

cpe:2.3:o:arista:eos:4.20.5f
Arista » Eos » Version: 4.21

cpe:2.3:o:arista:eos:4.21
Arista » Eos » Version: 4.21.0

cpe:2.3:o:arista:eos:4.21.0
Arista » Eos » Version: 4.21.0f

cpe:2.3:o:arista:eos:4.21.0f
Arista » Eos » Version: 4.21.11m

cpe:2.3:o:arista:eos:4.21.11m
Arista » Eos » Version: 4.21.12m

cpe:2.3:o:arista:eos:4.21.12m
Arista » Eos » Version: 4.21.13m

cpe:2.3:o:arista:eos:4.21.13m
Arista » Eos » Version: 4.21.14m

cpe:2.3:o:arista:eos:4.21.14m
Arista » Eos » Version: 4.21.1f

cpe:2.3:o:arista:eos:4.21.1f
Arista » Eos » Version: 4.21.2.4

cpe:2.3:o:arista:eos:4.21.2.4
Arista » Eos » Version: 4.21.3

cpe:2.3:o:arista:eos:4.21.3
Arista » Eos » Version: 4.21.3f

cpe:2.3:o:arista:eos:4.21.3f
Arista » Eos » Version: 4.21.4.1f

cpe:2.3:o:arista:eos:4.21.4.1f
Arista » Eos » Version: 4.21.8

cpe:2.3:o:arista:eos:4.21.8
Arista » Eos » Version: 4.21.8m

cpe:2.3:o:arista:eos:4.21.8m
Arista » Eos » Version: 4.21.9m

cpe:2.3:o:arista:eos:4.21.9m
Arista » Eos » Version: 4.22

cpe:2.3:o:arista:eos:4.22
Arista » Eos » Version: 4.22.0f

cpe:2.3:o:arista:eos:4.22.0f
Arista » Eos » Version: 4.22.1f

cpe:2.3:o:arista:eos:4.22.1f
Arista » Eos » Version: 4.22.3m

cpe:2.3:o:arista:eos:4.22.3m
Arista » Eos » Version: 4.22.4m

cpe:2.3:o:arista:eos:4.22.4m
Arista » Eos » Version: 4.22.6m

cpe:2.3:o:arista:eos:4.22.6m
Arista » Eos » Version: 4.22.7m

cpe:2.3:o:arista:eos:4.22.7m
Arista » Eos » Version: 4.22.8.1f

cpe:2.3:o:arista:eos:4.22.8.1f
Arista » Eos » Version: 4.22.9m

cpe:2.3:o:arista:eos:4.22.9m
Arista » Eos » Version: 4.23

cpe:2.3:o:arista:eos:4.23
Arista » Eos » Version: 4.23.0f

cpe:2.3:o:arista:eos:4.23.0f
Arista » Eos » Version: 4.23.10

cpe:2.3:o:arista:eos:4.23.10
Arista » Eos » Version: 4.23.13m

cpe:2.3:o:arista:eos:4.23.13m
Arista » Eos » Version: 4.23.1f

cpe:2.3:o:arista:eos:4.23.1f
Arista » Eos » Version: 4.23.2f

cpe:2.3:o:arista:eos:4.23.2f
Arista » Eos » Version: 4.23.3m

cpe:2.3:o:arista:eos:4.23.3m
Arista » Eos » Version: 4.23.4m

cpe:2.3:o:arista:eos:4.23.4m
Arista » Eos » Version: 4.23.5m

cpe:2.3:o:arista:eos:4.23.5m
Arista » Eos » Version: 4.23.6m

cpe:2.3:o:arista:eos:4.23.6m
Arista » Eos » Version: 4.23.7m

cpe:2.3:o:arista:eos:4.23.7m
Arista » Eos » Version: 4.23.9

cpe:2.3:o:arista:eos:4.23.9
Arista » Eos » Version: 4.23.9m

cpe:2.3:o:arista:eos:4.23.9m
Arista » Eos » Version: 4.24

cpe:2.3:o:arista:eos:4.24
Arista » Eos » Version: 4.24.0

cpe:2.3:o:arista:eos:4.24.0
Arista » Eos » Version: 4.24.0f

cpe:2.3:o:arista:eos:4.24.0f
Arista » Eos » Version: 4.24.2.1f

cpe:2.3:o:arista:eos:4.24.2.1f
Arista » Eos » Version: 4.24.2.4f

cpe:2.3:o:arista:eos:4.24.2.4f
Arista » Eos » Version: 4.24.2f

cpe:2.3:o:arista:eos:4.24.2f
Arista » Eos » Version: 4.24.3.1m

cpe:2.3:o:arista:eos:4.24.3.1m
Arista » Eos » Version: 4.24.5m

cpe:2.3:o:arista:eos:4.24.5m
Arista » Eos » Version: 4.24.7

cpe:2.3:o:arista:eos:4.24.7
Arista » Eos » Version: 4.24.7m

cpe:2.3:o:arista:eos:4.24.7m
Arista » Eos » Version: 4.24.8

cpe:2.3:o:arista:eos:4.24.8
Arista » Eos » Version: 4.24.9

cpe:2.3:o:arista:eos:4.24.9
Arista » Eos » Version: 4.25.0

cpe:2.3:o:arista:eos:4.25.0
Arista » Eos » Version: 4.25.0f

cpe:2.3:o:arista:eos:4.25.0f
Arista » Eos » Version: 4.25.1f

cpe:2.3:o:arista:eos:4.25.1f
Arista » Eos » Version: 4.25.2f

cpe:2.3:o:arista:eos:4.25.2f
Arista » Eos » Version: 4.25.4

cpe:2.3:o:arista:eos:4.25.4
Arista » Eos » Version: 4.25.5

cpe:2.3:o:arista:eos:4.25.5
Arista » Eos » Version: 4.25.5.1m

cpe:2.3:o:arista:eos:4.25.5.1m
Arista » Eos » Version: 4.25.6

cpe:2.3:o:arista:eos:4.25.6
Arista » Eos » Version: 4.25.8

cpe:2.3:o:arista:eos:4.25.8
Arista » Eos » Version: 4.26.0

cpe:2.3:o:arista:eos:4.26.0
Arista » Eos » Version: 4.26.1

cpe:2.3:o:arista:eos:4.26.1
Arista » Eos » Version: 4.26.1f

cpe:2.3:o:arista:eos:4.26.1f
Arista » Eos » Version: 4.26.2

cpe:2.3:o:arista:eos:4.26.2
Arista » Eos » Version: 4.26.2f

cpe:2.3:o:arista:eos:4.26.2f
Arista » Eos » Version: 4.26.3m

cpe:2.3:o:arista:eos:4.26.3m
Arista » Eos » Version: 4.26.4

cpe:2.3:o:arista:eos:4.26.4
Arista » Eos » Version: 4.26.4m

cpe:2.3:o:arista:eos:4.26.4m
Arista » Eos » Version: 4.26.5

cpe:2.3:o:arista:eos:4.26.5
Arista » Eos » Version: 4.27.0

cpe:2.3:o:arista:eos:4.27.0
Arista » Eos » Version: 4.27.0f

cpe:2.3:o:arista:eos:4.27.0f
Arista » Eos » Version: 4.27.1

cpe:2.3:o:arista:eos:4.27.1
Arista » Eos » Version: 4.27.1f

cpe:2.3:o:arista:eos:4.27.1f
Arista » Eos » Version: 4.27.3

cpe:2.3:o:arista:eos:4.27.3
Arista » Eos » Version: 4.9.0

cpe:2.3:o:arista:eos:4.9.0
Arista » Eos » Version: 4.9.12

cpe:2.3:o:arista:eos:4.9.12

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2021-28511

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