Vulnerability-Lookup

GHSA-7RJH-M68P-34PQ

Vulnerability from github – Published: 2022-08-06 00:00 – Updated: 2022-08-16 00:00

Details

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.

Severity ?

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2021-28511"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-08-05T17:15:00Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-7rjh-m68p-34pq",
  "modified": "2022-08-16T00:00:23Z",
  "published": "2022-08-06T00:00:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28511"
    },
    {
      "type": "WEB",
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    }
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  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-28511 (GCVE-0-2021-28511)

Vulnerability from cvelistv5 – Published: 2022-08-05 16:47 – Updated: 2024-09-16 17:15

Title

Summary

Severity ?

5.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

CWE

CWE-284 - Improper Access Control

Assigner

Arista

References

URL

Tags

https://www.arista.com/en/support/advisories-noti…

x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Arista Networks	EOS	Affected: 4.24.0 , ≤ 4.24.9 (custom) Affected: 4.25.0 , ≤ 4.25.8 (custom) Affected: 4.26.0 , ≤ 4.26.5 (custom) Affected: 4.27.0 , ≤ 4.27.3 (custom)

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        }
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-7RJH-M68P-34PQ

CVE-2021-28511 (GCVE-0-2021-28511)

Tags

Sightings

Nomenclature