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CiscoCVE-2024-20406

HistorySep 11, 2024 - 5:15 p.m.

CVE-2024-20406

2024-09-1117:15:13

CWE-20

cisco

web.nvd.nist.gov

cisco

is-is

vulnerability

denial of service

adjacency

routing

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.3

Confidence

High

EPSS

Percentile

9.6%

JSON

A vulnerability in the segment routing feature for the Intermediate System-to-Intermediate System (IS-IS) protocol of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to insufficient input validation of ingress IS-IS packets. An attacker could exploit this vulnerability by sending specific IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the IS-IS process on all affected devices that are participating in the Flexible Algorithm to crash and restart, resulting in a DoS condition.
Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and must have formed an adjacency. This vulnerability affects segment routing for IS-IS over IPv4 and IPv6 control planes as well as devices that are configured as level 1, level 2, or multi-level routing IS-IS type.

Affected configurations

Vulners

Node

ciscoios_xr_softwareMatch7.4.1

ciscoios_xr_softwareMatch6.8.1

ciscoios_xr_softwareMatch7.4.15

ciscoios_xr_softwareMatch7.5.1

ciscoios_xr_softwareMatch7.4.16

ciscoios_xr_softwareMatch7.6.1

ciscoios_xr_softwareMatch7.5.2

ciscoios_xr_softwareMatch7.8.1

ciscoios_xr_softwareMatch7.6.15

ciscoios_xr_softwareMatch7.5.12

ciscoios_xr_softwareMatch7.7.1

ciscoios_xr_softwareMatch6.8.2

ciscoios_xr_softwareMatch7.4.2

ciscoios_xr_softwareMatch6.9.1

ciscoios_xr_softwareMatch7.6.2

ciscoios_xr_softwareMatch7.5.3

ciscoios_xr_softwareMatch7.7.2

ciscoios_xr_softwareMatch6.9.2

ciscoios_xr_softwareMatch7.9.1

ciscoios_xr_softwareMatch7.10.1

ciscoios_xr_softwareMatch7.8.2

ciscoios_xr_softwareMatch7.5.4

ciscoios_xr_softwareMatch7.8.22

ciscoios_xr_softwareMatch7.7.21

ciscoios_xr_softwareMatch7.9.2

ciscoios_xr_softwareMatch7.5.5

ciscoios_xr_softwareMatch7.11.1

ciscoios_xr_softwareMatch7.9.21

ciscoios_xr_softwareMatch7.10.2

ciscoios_xr_softwareMatch7.6.3

VendorProductVersionCPE
ciscoios_xr_software7.4.1cpe:2.3:o:cisco:ios_xr_software:7.4.1:*:*:*:*:*:*:*
ciscoios_xr_software6.8.1cpe:2.3:o:cisco:ios_xr_software:6.8.1:*:*:*:*:*:*:*
ciscoios_xr_software7.4.15cpe:2.3:o:cisco:ios_xr_software:7.4.15:*:*:*:*:*:*:*
ciscoios_xr_software7.5.1cpe:2.3:o:cisco:ios_xr_software:7.5.1:*:*:*:*:*:*:*
ciscoios_xr_software7.4.16cpe:2.3:o:cisco:ios_xr_software:7.4.16:*:*:*:*:*:*:*
ciscoios_xr_software7.6.1cpe:2.3:o:cisco:ios_xr_software:7.6.1:*:*:*:*:*:*:*
ciscoios_xr_software7.5.2cpe:2.3:o:cisco:ios_xr_software:7.5.2:*:*:*:*:*:*:*
ciscoios_xr_software7.8.1cpe:2.3:o:cisco:ios_xr_software:7.8.1:*:*:*:*:*:*:*
ciscoios_xr_software7.6.15cpe:2.3:o:cisco:ios_xr_software:7.6.15:*:*:*:*:*:*:*
ciscoios_xr_software7.5.12cpe:2.3:o:cisco:ios_xr_software:7.5.12:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	ios_xr_software	7.4.1	cpe:2.3:o:cisco:ios_xr_software:7.4.1:::::::*
cisco	ios_xr_software	6.8.1	cpe:2.3:o:cisco:ios_xr_software:6.8.1:::::::*
cisco	ios_xr_software	7.4.15	cpe:2.3:o:cisco:ios_xr_software:7.4.15:::::::*
cisco	ios_xr_software	7.5.1	cpe:2.3:o:cisco:ios_xr_software:7.5.1:::::::*
cisco	ios_xr_software	7.4.16	cpe:2.3:o:cisco:ios_xr_software:7.4.16:::::::*
cisco	ios_xr_software	7.6.1	cpe:2.3:o:cisco:ios_xr_software:7.6.1:::::::*
cisco	ios_xr_software	7.5.2	cpe:2.3:o:cisco:ios_xr_software:7.5.2:::::::*
cisco	ios_xr_software	7.8.1	cpe:2.3:o:cisco:ios_xr_software:7.8.1:::::::*
cisco	ios_xr_software	7.6.15	cpe:2.3:o:cisco:ios_xr_software:7.6.15:::::::*
cisco	ios_xr_software	7.5.12	cpe:2.3:o:cisco:ios_xr_software:7.5.12:::::::*

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CNA Affected

[
  {
    "vendor": "Cisco",
    "product": "Cisco IOS XR Software",
    "versions": [
      {
        "version": "7.4.1",
        "status": "affected"
      },
      {
        "version": "6.8.1",
        "status": "affected"
      },
      {
        "version": "7.4.15",
        "status": "affected"
      },
      {
        "version": "7.5.1",
        "status": "affected"
      },
      {
        "version": "7.4.16",
        "status": "affected"
      },
      {
        "version": "7.6.1",
        "status": "affected"
      },
      {
        "version": "7.5.2",
        "status": "affected"
      },
      {
        "version": "7.8.1",
        "status": "affected"
      },
      {
        "version": "7.6.15",
        "status": "affected"
      },
      {
        "version": "7.5.12",
        "status": "affected"
      },
      {
        "version": "7.7.1",
        "status": "affected"
      },
      {
        "version": "6.8.2",
        "status": "affected"
      },
      {
        "version": "7.4.2",
        "status": "affected"
      },
      {
        "version": "6.9.1",
        "status": "affected"
      },
      {
        "version": "7.6.2",
        "status": "affected"
      },
      {
        "version": "7.5.3",
        "status": "affected"
      },
      {
        "version": "7.7.2",
        "status": "affected"
      },
      {
        "version": "6.9.2",
        "status": "affected"
      },
      {
        "version": "7.9.1",
        "status": "affected"
      },
      {
        "version": "7.10.1",
        "status": "affected"
      },
      {
        "version": "7.8.2",
        "status": "affected"
      },
      {
        "version": "7.5.4",
        "status": "affected"
      },
      {
        "version": "7.8.22",
        "status": "affected"
      },
      {
        "version": "7.7.21",
        "status": "affected"
      },
      {
        "version": "7.9.2",
        "status": "affected"
      },
      {
        "version": "7.5.5",
        "status": "affected"
      },
      {
        "version": "7.11.1",
        "status": "affected"
      },
      {
        "version": "7.9.21",
        "status": "affected"
      },
      {
        "version": "7.10.2",
        "status": "affected"
      },
      {
        "version": "7.6.3",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  }
]

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-isis-xehpbVNe

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.3

Confidence

High

EPSS

Percentile

9.6%

JSON

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