TI-2015-03522 Aliases CVE-2015-4203 GHSA-mfgx-5384-69g8

Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on…

LOW 29CWE-362Published 2015-06-23 · Updated 2024-08-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: None · None · Complete
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.

Why it matters now

EPSS 0.02208 82nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios:12.2\(33\)sch:::::::*	12.2(33)sch	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:12.2sch:::::::*	12.2sch	Vulnerable	Cisco
cpe:2.3:h:cisco:ubr10000_cable_modem_termination_system:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:ios:12.2\(33\)sch:*:*:*:*:*:*:* Versions 12.2(33)sch Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:12.2sch:*:*:*:*:*:*:* Versions 12.2sch Vulnerable ·Cisco
cpe:2.3:h:cisco:ubr10000_cable_modem_termination_system:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2015-4203
2026-10-03 Alias added: GHSA-mfgx-5384-69g8

References

Advisory 1

20150622 Cisco IOS Software UBR Devices IPv6 VPN Multiprotocol Label Switching Denial of Service Vulnerability

TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8

See all 617 →

Sources

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