Heap-based buffer overflow in libsox - CVE-2021-40426

Vulnerability identifier: #VU61598

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-2021-40426

CWE-ID: CWE-122

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 the sphere.c start_read() functionality. A remote attacker can use a specially crafted file, trigger 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.

libsox
Debian Linux
Ubuntu
libsox2 (Ubuntu package)
sox (Ubuntu package)
libsox3 (Ubuntu package)
sox (Debian package)

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

libsox2 (Ubuntu package) - update to Ubuntu Pro
sox (Ubuntu package) - addressed in versions Ubuntu Pro, 14.4.2+git20190427-3ubuntu0.1, 14.4.2+git20190427-3ubuntu0.2, 14.4.2+git20190427-2+deb11u1build0.20.04.1, 14.4.2+git20190427-2+deb11u1build0.22.04.1, 14.4.2+git20190427-2+deb11u2build0.20.04.1, 14.4.2+git20190427-2+deb11u2build0.22.04.1, 14.4.2-3ubuntu0.18.04.2, 14.4.2-3ubuntu0.18.04.3
libsox3 (Ubuntu package) - addressed in versions 14.4.2+git20190427-3ubuntu0.1, 14.4.2+git20190427-3ubuntu0.2, 14.4.2+git20190427-2+deb11u1build0.20.04.1, 14.4.2+git20190427-2+deb11u1build0.22.04.1, 14.4.2+git20190427-2+deb11u2build0.20.04.1, 14.4.2+git20190427-2+deb11u2build0.22.04.1, 14.4.2-3ubuntu0.18.04.2, 14.4.2-3ubuntu0.18.04.3
sox (Debian package) - update to 14.4.2+git20190427-2+deb11u1

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1434

• Heap-based buffer overflow in Sound Exchange libsox
• Ubuntu update for sox
• Ubuntu update for sox
• Debian update for sox