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CVE-2018-0189

UnknownEPSS 1.05%

Last modified

CVE-2018-0189 is a vulnerability of currently unknown severity. A vulnerability in the Forwarding Information Base (FIB) code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, network attacker to cause a denial of service (DoS) condition. The vulnerability is due to a limitation in the way the FIB is internally representing recursive routes. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

Description

A vulnerability in the Forwarding Information Base (FIB) code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, network attacker to cause a denial of service (DoS) condition. The vulnerability is due to a limitation in the way the FIB is internally representing recursive routes. An attacker could exploit this vulnerability by injecting routes into the routing protocol that have a specific recursive pattern. The attacker must be in a position on the network that provides the ability to inject a number of recursive routes with a specific pattern. An exploit could allow the attacker to cause an affected device to reload, creating a DoS condition. Cisco Bug IDs: CSCva91655.

Metrics

EPSS Probability
1.05%

60.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe< 15.5\(3\)s5
CiscoIos Xe< 15.5\(3\)m5
CiscoIos Xe< 15.4\(3\)s7
CiscoIos Xe< 15.4\(2\)s1
CiscoIos Xe< 15.4\(1\)s1
CiscoIos Xe< 15.4\(1\)s0a
CiscoIos Xe< 15.2\(5\)e1
CiscoIos Xe< 15.2\(4\)e5
CiscoIos Xe< 15.2\(2\)e1
CiscoIos Xe< 15.2\(1\)e1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-0189?
A vulnerability in the Forwarding Information Base (FIB) code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, network attacker to cause a denial of service (DoS) condition. The vulnerability is due to a limitation in the way the FIB is internally representing recursive routes. An attacker could exploit this vulnerability by injecting routes into the routing protocol that have a specific recursive pattern. The attacker must be in a position on the network that provides the ability to inject a number of recursive routes with a specific pattern. An exploit could allow the attacker to cause an affected device to reload, creating a DoS condition. Cisco Bug IDs: CSCva91655.
How severe is CVE-2018-0189?
Severity scoring for CVE-2018-0189 is pending analysis. The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.
How do I fix CVE-2018-0189?
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-2018-0189?

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

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Source: NVD / NIST