CVE-2024-20327

2024-03-1317:15:48

CWE-20

[email protected]

web.nvd.nist.gov

cisco asr 9000

dos

pppoe

vulnerability

nvd

cisco ios xr software

7.4 High

CVSS3

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

7.3 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

A vulnerability in the PPP over Ethernet (PPPoE) termination feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, adjacent attacker to crash the ppp_ma process, resulting in a denial of service (DoS) condition.

This vulnerability is due to the improper handling of malformed PPPoE packets that are received on a router that is running Broadband Network Gateway (BNG) functionality with PPPoE termination on a Lightspeed-based or Lightspeed-Plus-based line card. An attacker could exploit this vulnerability by sending a crafted PPPoE packet to an affected line card interface that does not terminate PPPoE. A successful exploit could allow the attacker to crash the ppp_ma process, resulting in a DoS condition for PPPoE traffic across the router.

CNA Affected

[
  {
    "vendor": "Cisco",
    "product": "Cisco IOS XR Software",
    "versions": [
      {
        "version": "5.2.0",
        "status": "affected"
      },
      {
        "version": "5.2.2",
        "status": "affected"
      },
      {
        "version": "5.2.4",
        "status": "affected"
      },
      {
        "version": "5.3.0",
        "status": "affected"
      },
      {
        "version": "5.3.1",
        "status": "affected"
      },
      {
        "version": "5.3.2",
        "status": "affected"
      },
      {
        "version": "5.3.3",
        "status": "affected"
      },
      {
        "version": "5.3.4",
        "status": "affected"
      },
      {
        "version": "6.0.0",
        "status": "affected"
      },
      {
        "version": "6.0.1",
        "status": "affected"
      },
      {
        "version": "6.0.2",
        "status": "affected"
      },
      {
        "version": "6.1.1",
        "status": "affected"
      },
      {
        "version": "6.1.2",
        "status": "affected"
      },
      {
        "version": "6.1.3",
        "status": "affected"
      },
      {
        "version": "6.1.4",
        "status": "affected"
      },
      {
        "version": "6.2.1",
        "status": "affected"
      },
      {
        "version": "6.2.2",
        "status": "affected"
      },
      {
        "version": "6.2.3",
        "status": "affected"
      },
      {
        "version": "6.2.25",
        "status": "affected"
      },
      {
        "version": "6.3.2",
        "status": "affected"
      },
      {
        "version": "6.3.3",
        "status": "affected"
      },
      {
        "version": "6.4.1",
        "status": "affected"
      },
      {
        "version": "6.4.2",
        "status": "affected"
      },
      {
        "version": "6.5.1",
        "status": "affected"
      },
      {
        "version": "6.5.2",
        "status": "affected"
      },
      {
        "version": "6.5.3",
        "status": "affected"
      },
      {
        "version": "6.6.2",
        "status": "affected"
      },
      {
        "version": "6.6.3",
        "status": "affected"
      },
      {
        "version": "6.6.25",
        "status": "affected"
      },
      {
        "version": "7.0.1",
        "status": "affected"
      },
      {
        "version": "7.0.2",
        "status": "affected"
      },
      {
        "version": "7.1.1",
        "status": "affected"
      },
      {
        "version": "7.1.15",
        "status": "affected"
      },
      {
        "version": "7.1.2",
        "status": "affected"
      },
      {
        "version": "7.1.3",
        "status": "affected"
      },
      {
        "version": "6.7.1",
        "status": "affected"
      },
      {
        "version": "6.7.2",
        "status": "affected"
      },
      {
        "version": "6.7.3",
        "status": "affected"
      },
      {
        "version": "7.3.1",
        "status": "affected"
      },
      {
        "version": "7.3.2",
        "status": "affected"
      },
      {
        "version": "7.3.3",
        "status": "affected"
      },
      {
        "version": "7.3.5",
        "status": "affected"
      },
      {
        "version": "7.4.1",
        "status": "affected"
      },
      {
        "version": "7.4.2",
        "status": "affected"
      },
      {
        "version": "6.8.1",
        "status": "affected"
      },
      {
        "version": "6.8.2",
        "status": "affected"
      },
      {
        "version": "7.5.1",
        "status": "affected"
      },
      {
        "version": "7.5.3",
        "status": "affected"
      },
      {
        "version": "7.5.2",
        "status": "affected"
      },
      {
        "version": "7.5.4",
        "status": "affected"
      },
      {
        "version": "7.5.5",
        "status": "affected"
      },
      {
        "version": "7.6.1",
        "status": "affected"
      },
      {
        "version": "7.6.2",
        "status": "affected"
      },
      {
        "version": "7.7.1",
        "status": "affected"
      },
      {
        "version": "7.7.2",
        "status": "affected"
      },
      {
        "version": "6.9.1",
        "status": "affected"
      },
      {
        "version": "6.9.2",
        "status": "affected"
      },
      {
        "version": "7.8.1",
        "status": "affected"
      },
      {
        "version": "7.8.2",
        "status": "affected"
      },
      {
        "version": "7.9.1",
        "status": "affected"
      },
      {
        "version": "7.9.2",
        "status": "affected"
      }
    ]
  }
]