CVE-2024-20327

HIGH

7.4

CVSS Score

Published: March 13, 2024 at 04:40 PM UTC

Updated: June 17, 2026 at 07:06 AM UTC

13 products affected across 1 vendorIOS XrAsr 9010Asr 9904

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Severity

HIGH7.4

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xr · Cisco

95%

v < 7.9.217.10 ≤ v < 7.10.17.11 ≤ v < 7.11.15.2.0 5.2.2 5.2.4 5.3.0 5.3.1 5.3.2 5.3.3 5.3.4 6.0.0 6.0.1 6.0.2 6.1.1 6.1.2 6.1.3 6.1.4 6.2.1 6.2.2 6.2.25 6.2.3 6.3.2 6.3.3 6.4.1 6.4.2 6.5.1 6.5.2 6.5.3 6.6.2 6.6.25 6.6.3 6.7.1 6.7.2 6.7.3 6.8.1 6.8.2 6.9.1 6.9.2 7.0.1 7.0.2 7.1.1 7.1.15 7.1.2 7.1.3 7.3.1 7.3.2 7.3.3 7.3.5 7.4.1 7.4.2 7.5.1 7.5.2 7.5.3 7.5.4 7.5.5 7.6.1 7.6.2 7.7.1 7.7.2 7.8.1 7.8.2 7.9.1 7.9.2

Affected range stops below 7.10.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.11.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.9.21, so it looks safe — our inference, not a vendor statement

cisco-asr-9000v-v2 (environment) · cisco-asr-9001 (environment) · cisco-asr-9006 (environment) · cisco-asr-9010 (environment) · cisco-asr-9901 (environment) · cisco-asr-9902 (environment) · cisco-asr-9903 (environment) · cisco-asr-9904 (environment) · cisco-asr-9906 (environment) · cisco-asr-9910 (environment) · cisco-asr-9912 (environment) · cisco-asr-9922 (environment)

Asr 9000V-V2 · Ciscodevice

80%

All versions

Asr 9001 · Ciscodevice

80%

All versions

Asr 9006 · Ciscodevice

80%

All versions

Asr 9010 · Ciscodevice

80%

All versions