Denial of service in Digium Asterisk

1) Resource exhaustion

EUVDB-ID: #VU9523

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to an error when handling malicious input. A remote attacker can send a flood of specially crafted data to trigger a flaw in the chan_skinny (SCCP protocol) channel driver, consume excessive virtual memory on the target system and cause the service to stop processing requests. .

Successful exploitation of the vulnerability results in denial of service.

Mitigation

The vulnerability is addressed in the following versions: 13.18.3, 14.7.3, 15.1.3.

Vulnerable software versions

Asterisk Open Source: 11.13.0 - 15.1.0

CPE2.3

• cpe:2.3:a:digium_linux_support_services:asterisk:11.13.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium_linux_support_services:asterisk:13.18.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium_linux_support_services:asterisk:14.7.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium_linux_support_services:asterisk:15.1.0:*:*:*:*:*:*:*

External links

https://downloads.asterisk.org/pub/security/AST-2017-013.html

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.