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AristaCVE-2021-28507

HistoryJan 14, 2022 - 8:15 p.m.

CVE-2021-28507

2022-01-1420:15:10

CWE-284

Arista

web.nvd.nist.gov

arista eos

acl bypass

openconfig

gnoi

restconf

nvd

cve-2021-28507

CVSS2

4.9

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:S/C:P/I:P/A:N

CVSS3

7.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

24.8%

JSON

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.

Affected configurations

Nvd

Node

aristaeosRange4.23.0–4.23.9m

aristaeosRange4.24.0–4.24.7m

aristaeosRange4.25.0–4.25.3

aristaeosRange4.25.4–4.25.4m

aristaeosRange4.25.5–4.25.5.1m

aristaeosRange4.26.0–4.26.2f

aristaeosMatch4.21.0f

aristaeosMatch4.21.1f

aristaeosMatch4.21.3f

aristaeosMatch4.22.0f

aristaeosMatch4.22.1f

VendorProductVersionCPE
aristaeos*cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
aristaeos4.21.0fcpe:2.3:o:arista:eos:4.21.0f:*:*:*:*:*:*:*
aristaeos4.21.1fcpe:2.3:o:arista:eos:4.21.1f:*:*:*:*:*:*:*
aristaeos4.21.3fcpe:2.3:o:arista:eos:4.21.3f:*:*:*:*:*:*:*
aristaeos4.22.0fcpe:2.3:o:arista:eos:4.22.0f:*:*:*:*:*:*:*
aristaeos4.22.1fcpe:2.3:o:arista:eos:4.22.1f:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
arista	eos	*	cpe:2.3:o:arista:eos::::::::
arista	eos	4.21.0f	cpe:2.3:o:arista:eos:4.21.0f:::::::*
arista	eos	4.21.1f	cpe:2.3:o:arista:eos:4.21.1f:::::::*
arista	eos	4.21.3f	cpe:2.3:o:arista:eos:4.21.3f:::::::*
arista	eos	4.22.0f	cpe:2.3:o:arista:eos:4.22.0f:::::::*
arista	eos	4.22.1f	cpe:2.3:o:arista:eos:4.22.1f:::::::*

CNA Affected

[
  {
    "product": "EOS",
    "vendor": "Arista Networks",
    "versions": [
      {
        "status": "affected",
        "version": "4.22.x"
      },
      {
        "lessThanOrEqual": "4.26.0",
        "status": "affected",
        "version": "4.26.2F",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "4.25.5",
        "status": "affected",
        "version": "4.25.5.1M",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "4.25.4",
        "status": "affected",
        "version": "4.25.4M",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "4.25.0",
        "status": "affected",
        "version": "4.25.3",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "4.24.0",
        "status": "affected",
        "version": "4.24.7M",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "4.23.0",
        "status": "affected",
        "version": "4.23.9M",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "4.21.x",
        "status": "affected",
        "version": "4.21.x",
        "versionType": "custom"
      }
    ]
  }
]

References

www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071

CVSS2

4.9

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:S/C:P/I:P/A:N

CVSS3

7.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

24.8%

JSON

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