Vulnerability identifier: #VU10411

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0132

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco IOS XR
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the forwarding information base (FIB) code of Cisco IOS XR Software due to incorrect processing of extremely long routing updates. a remote attacker can send a large routing update, trigger inconsistency between the FIB and the RIB, resulting in denia of service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cisco IOS XR: 5.3.0

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207-iosxr

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.