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TI-2024-13261 Aliases CVE-2024-20327GHSA-2295-7pf8-fmwg

Improper input validation in Cisco IOS XR Software

Priority LOW 32CWE-20Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00336 27th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco IOS XR Software5.2.0; 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; 6.2.3; 6.2.25; 6.3.2; 6.3.3; 6.4.1; 6.4.2; 6.5.1; 6.5.2; 6.5.3; 6.6.2; 6.6.3; 6.6.25; 7.0.1; 7.0.2; 7.1.1; 7.1.15; 7.1.2; 7.1.3; 6.7.1; 6.7.2; 6.7.3; 7.3.1; 7.3.2; 7.3.3; 7.3.5; 7.4.1; 7.4.2; 6.8.1; 6.8.2; 7.5.1; 7.5.3; 7.5.2; 7.5.4; 7.5.5; 7.6.1; 7.6.2; 7.7.1; 7.7.2; 6.9.1; 6.9.2; 7.8.1; 7.8.2; 7.9.1; 7.9.2—No fix listedCNA
  • Cisco IOS XR Software VendorCisco Affected 5.2.0; 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; 6.2.3; 6.2.25; 6.3.2; 6.3.3; 6.4.1; 6.4.2; 6.5.1; 6.5.2; 6.5.3; 6.6.2; 6.6.3; 6.6.25; 7.0.1; 7.0.2; 7.1.1; 7.1.15; 7.1.2; 7.1.3; 6.7.1; 6.7.2; 6.7.3; 7.3.1; 7.3.2; 7.3.3; 7.3.5; 7.4.1; 7.4.2; 6.8.1; 6.8.2; 7.5.1; 7.5.3; 7.5.2; 7.5.4; 7.5.5; 7.6.1; 7.6.2; 7.7.1; 7.7.2; 6.9.1; 6.9.2; 7.8.1; 7.8.2; 7.9.1; 7.9.2 Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*before 7.9.21; 7.10 to before 7.10.1; 7.11 to before 7.11.1VulnerableCisco
cpe:2.3:h:cisco:asr_9000v-v2:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9902:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9903:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* Versions before 7.9.21; 7.10 to before 7.10.1; 7.11 to before 7.11.1 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asr_9000v-v2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9902:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9903:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-20327
  2. 2026-10-03 Alias added: GHSA-2295-7pf8-fmwg

References

Advisory 1

  • TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
  • TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
  • TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
See all 199 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences