Multiple vulnerabilities in PJSIP

Published: 2021-03-11 | Updated: 2022-05-04

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-15260 CVE-2021-21375
CWE-ID	CWE-297 CWE-400
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	pjsip Universal components / Libraries / Libraries used by multiple products
Vendor	pjsip

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper validation of certificate with host mismatch

EUVDB-ID: #VU62781

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15260

CWE-ID: CWE-297 - Improper Validation of Certificate with Host Mismatch

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper remote hostname authentication. A remote attacker can perform a man-in-the-middle attack and route a connection to another destination.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

pjsip: 2.0 - 2.10

External links

http://github.com/pjsip/pjproject/commit/67e46c1ac45ad784db5b9080f5ed8b133c122872
http://github.com/pjsip/pjproject/pull/2663
http://github.com/pjsip/pjproject/security/advisories/GHSA-8hcp-hm38-mfph

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.

2) Resource exhaustion

EUVDB-ID: #VU62780

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21375

CWE-ID: CWE-400 - Resource exhaustion