Out-of-bounds read in ClamAV - CVE-2020-3341

Vulnerability identifier: #VU27927

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-2020-3341

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 within the AES decryption routines when processing PDF files in ClamAV. A remote attacker can create a specially crafted file, pass it to the application, trigger an out-of-bounds read error and crash the service.

ClamAV
busybox (Alpine package)
clamav (Ubuntu package)
clamav (Alpine package)
firefox-esr (Alpine package)
clamav
Fedora
RSA Authentication Manager

Install updates from vendor's website.

ClamAV - update to 0.102.3
clamav (Ubuntu package) - addressed in versions 0.102.3+dfsg-0ubuntu0.12.04.1, 0.102.3+dfsg-0ubuntu0.14.04.1+esm1, 0.102.3+dfsg-0ubuntu0.16.04.1, 0.102.3+dfsg-0ubuntu0.18.04.1, 0.102.3+dfsg-0ubuntu0.19.10.1, 0.102.3+dfsg-0ubuntu0.20.04.1
clamav (Alpine package) - update to 0.102.3-r0
clamav - addressed in versions 0.102.3-1.el7, 0.102.3-1.el8, 0.102.3-1.fc30, 0.102.3-1.fc31, 0.102.3-1.fc32
RSA Authentication Manager - update to 8.5 Patch 3

• https://blog.clamav.net/2020/05/clamav-01023-security-patch-released.html

• Multiple vulnerabilities in Clam AntiVirus (ClamAV)
• Ubuntu ESM update for ClamAV
• Ubuntu update for ClamAV
• Out-of-bounds read in clamav (Alpine package)
• Out-of-bounds read in busybox (Alpine package)
• Out-of-bounds read in firefox-esr (Alpine package)
• Fedora 32 update for clamav
• Fedora EPEL 7 update for clamav
• Fedora 30 update for clamav
• Fedora 31 update for clamav
• Fedora EPEL 8 update for clamav
• RSA Authentication Manager update for third-party components