Vulnerability identifier: #VU69828

Vulnerability risk: Low

CVSSv3.1: 3.6 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-42706

CWE-ID: CWE-269

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Asterisk Open Source
Server applications / Conferencing, Collaboration and VoIP solutions
Certified Asterisk
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Digium (Linux Support Services)

Description

The vulnerability allows a remote user to escalate privileges.

The vulnerability exists due to improper privilege management. A remote user with “config” permissions can view files outside of Asterisk directory via GetConfig AMI Action even if “live_dangerously" is set to "no".

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Asterisk Open Source: 20.0.0 - 20.0.0 rc2, 19.0.0 rc1 - 19.7.0 rc2, 18.0.0 rc1 - 18.15.0 rc2, 17.0.0 - 17.9.4, 16.0.0 - 16.29.0 rc2

Certified Asterisk: 16.3-cert1 - 18.9-cert2

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External links
http://downloads.asterisk.org/pub/security/AST-2022-009.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.