TI-2018-00217 Aliases CVE-2018-0256 GHSA-x5fh-wf9q-7rgc

Improper input validation in Cisco Packet Data Network Gateway

LOW 35CWE-20Published 2018-04-19 · Updated 2024-11-29

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

A vulnerability in the peer-to-peer message processing functionality of Cisco Packet Data Network Gateway could allow an unauthenticated, remote attacker to cause the Session Manager (SESSMGR) process on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to incorrect validation of peer-to-peer packet headers. An attacker could exploit this vulnerability by sending a crafted peer-to-peer packet through an affected device. A successful exploit could allow the attacker to cause the SESSMGR process on the affected device to restart unexpectedly, which could briefly impact traffic while the SESSMGR process restarts and result in a DoS condition. Cisco Bug IDs: CSCvg88786.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0152 74th 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: Yes
Technical impact: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Cisco Packet Data Network Gateway	Cisco Packet Data Network Gateway	—	No fix listed	CNA

Cisco Packet Data Network Gateway Vendor— Affected Cisco Packet Data Network Gateway Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:asr_5000_series_software:20.3.0.66671:::::::*	20.3.0.66671	Vulnerable	Cisco
cpe:2.3:o:cisco:asr_5000_series_software:p2p_2.16.879:::::::*	p2p_2.16.879	Vulnerable	Cisco

cpe:2.3:o:cisco:asr_5000_series_software:20.3.0.66671:*:*:*:*:*:*:* Versions 20.3.0.66671 Vulnerable ·Cisco
cpe:2.3:o:cisco:asr_5000_series_software:p2p_2.16.879:*:*:*:*:*:*:* Versions p2p_2.16.879 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0256
2026-10-03 Alias added: GHSA-x5fh-wf9q-7rgc

References

Advisory 1

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-pdng

TI-2017-02916 Access control flaw in Cisco StarOS CVSS 3.0HIGH 8.8
TI-2017-04371 Memory corruption in Cisco ASR 5000 Series Aggregation Services Routers CVSS 3.0HIGH 8.6
TI-2016-07532 Memory corruption in Cisco ASR 5000 CVSS 3.0HIGH 7.5
TI-2016-05548 Resource management flaw in Cisco Aggregation Services Router 5000 Series Switch CVSS 3.0HIGH 7.5
TI-2016-01226 The SSH implementation in Cisco StarOS before 19.3.M0.62771 and 20.x before 20.0.M0.62768… CVSS 3.0HIGH 7.5
TI-2016-05547 Resource management flaw in Cisco StarOS 20.0.0 through 21.0.M0.64246 CVSS 3.0HIGH 7.5

See all 17 →

Sources

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