Security bypass in Cisco IOS

1) Security bypass

EUVDB-ID: #VU6428

Risk: Low

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

CVE-ID: CVE-2017-6624

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated attacker to bypass security restrictions on the target system.

The weakness exists due to a configuration restriction in the toll-fraud protections component of the affected software. A remote attacker can use the affected system to place unauthorized, long-distance phone calls.

Successful exploitation of the vulnerability results in unauthorized phone calls.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco IOS: 15.5.3 M

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-cme1

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.