#VU60955 Out-of-bounds read in pjsip - CVE-2021-43302

Vulnerability identifier: #VU60955

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-43302

CWE-ID: CWE-125

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in PJSUA API when calling pjsua_recorder_create. A remote attacker can trigger out-of-bounds read error and cause a denial of service condition on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

pjsip: 0.5.0.1 - 2.11.1

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External links
https://github.com/pjsip/pjproject/security/advisories/GHSA-qcvw-h34v-c7r9
https://jfrog.com/blog/jfrog-discloses-5-memory-corruption-vulnerabilities-in-pjsip-a-popular-multimedia-library/

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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.