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

Vulnerability identifier: #VU60955

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2021-43302

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

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