Vulnerability identifier: #VU11757

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-1349

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

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

Vendor: Cisco Systems, Inc

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

The weakness exists due to incorrect handling of image list parameters. A remote attacker can send specially crafted Smart Install packets to TCP port 4786 and cause the service to crash.

Mitigation
Update to versions 15.2(5.5.64)E, 15.2(5.5.63)E, 15.2(5.1.3)E, 15.2(5)E, 15.2(4.1.13)E, 15.2(4.1.5a)E, 15.2(4.0.95a)E, 15.2(4)E3, 15.2(4)E2, 15.2(4)E1, 15.2(4)E, 15.2(3)E3, 15.2(2.0.2)EA3, 15.2(2)EA3, 15.2(2)E4, 15.1(2)SG7, 15.0(2.1.94)SG11, 15.0(2.1.91)SG11, 15.0(2)SG11, 15.0(2)SE9, 15.0(2)EX11, 15.0(2)EX10, 12.2(60)EZ9, 12.2(55)SE11, 3.9(0)E, 3.8(0)E, 3.7(3)E or 3.6(4)E.

Vulnerable software versions

Cisco IOS XE: 15.2.1.1

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-smi

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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.