Remote code execution in Cisco IOS XE

1) Memory corruption

EUVDB-ID: #VU13217

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 - Memory corruption

Exploit availability: No

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

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_ios_xe:16.7.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_ios_xe: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.