Vulnerability identifier: #VU70479

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-23547

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
pjsip
Universal components / Libraries / Libraries used by multiple products

Vendor: pjsip

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when decoding STUN messages. A remote attacker can pass a specially crafted STUN message to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

pjsip: 2.0 - 2.13

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External links
http://github.com/pjsip/pjproject/security/advisories/GHSA-cxwq-5g9x-x7fr
http://github.com/pjsip/pjproject/commit/bc4812d31a67d5e2f973fbfaf950d6118226cf36
http://github.com/pjsip/pjproject/releases/tag/2.13.1

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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.