CVE-2018-0241

Name: CVE-2018-0241
Creator: NVD / NIST
Published: 2018-04-19T20:29:00.877+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.86%

Last modified Jun 17, 2026

CVE-2018-0241 is a vulnerability of currently unknown severity. A vulnerability in the UDP broadcast forwarding function of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to improper handling of UDP broadcast packets that are forwarded to an IPv4 helper address. EPSS estimates a 0.86% chance of exploitation in the next 30 days.

Description

A vulnerability in the UDP broadcast forwarding function of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to improper handling of UDP broadcast packets that are forwarded to an IPv4 helper address. An attacker could exploit this vulnerability by sending multiple UDP broadcast packets to the affected device. An exploit could allow the attacker to cause a buffer leak on the affected device, eventually resulting in a DoS condition requiring manual intervention to recover. This vulnerability affects all Cisco IOS XR platforms running 6.3.1, 6.2.3, or earlier releases of Cisco IOS XR Software when at least one IPv4 helper address is configured on an interface of the device. Cisco Bug IDs: CSCvi35625.

Metrics

EPSS Probability

0.86%

53.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Cisco	Ios Xr	4.0.4.base
Cisco	Ios Xr	4.1.3.base
Cisco	Ios Xr	4.2.4.base
Cisco	Ios Xr	4.3.4.base
Cisco	Ios Xr	4.4.3.ce
Cisco	Ios Xr	5.0.3.ce
Cisco	Ios Xr	5.1.4.base
Cisco	Ios Xr	5.2.5.ce
Cisco	Ios Xr	5.3.4.base
Cisco	Ios Xr	5.4.3.ce
Cisco	Ios Xr	6.0.4.base
Cisco	Ios Xr	6.1.4.base
Cisco	Ios Xr	6.2.3.base

References

http://www.securityfocus.com/bid/103929Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040710Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-iosxrVendor Advisory
http://www.securityfocus.com/bid/103929Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040710Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-iosxrVendor Advisory

Timeline

Published: Apr 19, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0241?

How severe is CVE-2018-0241?

Severity scoring for CVE-2018-0241 is pending analysis. The EPSS model estimates a 0.86% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0241?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0241?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST