#VU13217 Memory corruption in Cisco IOS XE - CVE-2018-0315

Vulnerability identifier: #VU13217

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-0315

CWE-ID: CWE-119

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 attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists in the authentication, authorization, and accounting (AAA) security services of Cisco IOS XE Software due to boundary error when the software parses a username during login authentication. A remote unauthenticated attacker can attempt to authenticate to an affected device, trigger memory corruption and cause the affected device to reload or execute arbitrary code with elevated privileges.

Mitigation
Update to versions 16.9(0.91), 16.8(1.69), 16.8(1.10), 16.8(0.294), 16.8(0.277), 16.7(1.142).

Vulnerable software versions

Cisco IOS XE: 16.7.1, 16.8.1

---

External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-aaa

---

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.