A vulnerability in the UDP broadcast forwarding function of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to caus…

Published 8 y ago 2018-04-19 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.4

v3.0 · NVD

CISA KEV

not known exploited

EPSS

0.8%

percentile 58%

Public exploits

none known

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.

CISA SSVC assessment

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 23 mo ago 2024-11-29

Exploit prediction (EPSS)

0.82% probability of exploitation in the next 30 days, higher than 58% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	7.4	`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`
NVD	2.0	6.1	`AV:A/AC:L/Au:N/C:N/I:N/A:C`

Affected products

n/a Cisco IOS XR

Classification

Weakness

CWE-399 Resource Management Errors

Technology feeds

Cisco IOS (RSS, critical only)

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-iosxr · x_refsource_CONFIRM, x_transferred
securitytracker.com /id/1040710 · vdb-entry, x_refsource_SECTRACK, x_transferred
securityfocus.com /bid/103929 · vdb-entry, x_refsource_BID, x_transferred

Sources

CVE List: CVE-2018-0241
NVD: CVE-2018-0241

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary