Buffer overflow in pjsip - CVE-2021-43303

Vulnerability identifier: #VU60956

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-43303

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to a boundary error in PJSUA API when calling pjsua_call_dump. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

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

pjsip
Debian Linux
Ubuntu
ring (Ubuntu package)
ring-daemon (Ubuntu package)
pjproject (Ubuntu package)
asterisk (Debian package)
jami (Ubuntu package)
jami-daemon (Ubuntu package)

Install updates from vendor's website.

pjsip - update to 2.12
ring (Ubuntu package) - addressed in versions Ubuntu Pro, 20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1
ring-daemon (Ubuntu package) - addressed in versions Ubuntu Pro, 20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1
pjproject (Ubuntu package) - addressed in versions 2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1, 2.7.2~dfsg-1ubuntu0.1~esm1
asterisk (Debian package) - update to 1:16.28.0~dfsg-0+deb11u1
jami (Ubuntu package) - addressed in versions 20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1, 20230206.0~ds1-5ubuntu0.1, 20230206.0~ds2-1.3ubuntu0.1
jami-daemon (Ubuntu package) - addressed in versions 20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1, 20230206.0~ds1-5ubuntu0.1, 20230206.0~ds2-1.3ubuntu0.1

• 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/

• Multiple vulnerabilities in PJSIP
• Debian update for asterisk
• Ubuntu update for ring
• Ubuntu update for ring
• Ubuntu update for pjproject