Denial of service in Cisco Voice Operating System

1) Improper input validation

EUVDB-ID: #VU13247

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-6779

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists in local file management for certain system log files due to a certain system log file does not have a maximum size restriction. A remote unauthenticated attacker can send specially crafted remote connection requests, increase the size of a system log file so that it consumes most of the disk space and cause the applications functions could operate abnormally.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Voice Operating System: All versions

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_voice_operating_system:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-diskdos

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.