Denial of service in Digium Asterisk

1) Memory corruption

EUVDB-ID: #VU9682

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-119 - Memory corruption

Exploit availability: No

Description

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

The weakness exists due to boundary error when handling user-supplied input. A remote attacker can establish a call to the target system and send a specially crafted compound RTCP packet containing more than one report, trigger memory corruption and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update to version 13.18.4, 14.7.4, 15.1.4.

Vulnerable software versions

Asterisk Open Source: 13.0.0 - 15.1.3

CPE2.3

• cpe:2.3:a:digium_linux_support_services:asterisk:13.18.3:*:*:*:*:*:*:*
• cpe:2.3:a:digium_linux_support_services:asterisk:14.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:digium_linux_support_services:asterisk:15.1.3:*:*:*:*:*:*:*

External links

https://downloads.asterisk.org/pub/security/AST-2017-012.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.