PT-2024-2336 · Cisco · Cisco Ios Xr

Published 2024-03-13 · Updated 2024-04-09 · CVE-2024-20327

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers (affected versions not specified)

Description A vulnerability in the PPP over Ethernet (PPPoE) termination feature could allow an unauthenticated, adjacent attacker to crash the ppp ma process, resulting in a denial of service (DoS) condition. This issue is due to the improper handling of malformed PPPoE packets received on a router running Broadband Network Gateway (BNG) functionality with PPPoE termination on a Lightspeed-based or Lightspeed-Plus-based line card. An attacker could exploit this by sending a crafted PPPoE packet to an affected line card interface that does not terminate PPPoE.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2024-02282

CVE-2024-20327

Affected Products

Cisco Ios Xr

References · 9

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-pppma-JKWFgneW · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-02282 · Security Note
• https://osv.dev/vulnerability/CVE-2024-20327 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-20327 · Security Note
• https://twitter.com/Action1corp/status/1777753712640864315 · Twitter Post
• https://t.me/true_secator/5530 · Telegram Post
• https://vuldb.com/?id.256733 · Note
• https://twitter.com/CVEnew/status/1767962582273434094 · Twitter Post
• https://cybersecurity-help.cz/vdb/SB2024031427 · Note