SB2021040720 - Multiple vulnerabilities in ClamAV
Published: April 7, 2021 Updated: May 3, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Insecure DLL loading (CVE-ID: CVE-2021-1386)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the application loads DLL libraries in an insecure manner. A local user can place a malicious .dll file in certain location on the system and execute arbitrary code with SYSTEM privileges.
Note, the vulnerability affects Windows installations only.
2) NULL pointer dereference (CVE-ID: CVE-2021-1405)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. A remote attacker can send a specially crafted email to the server and perform a denial of service (DoS) attack.
3) Out-of-bounds read (CVE-ID: CVE-2021-1404)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in the PDF parsing module. A remote attacker can create a specially crafted PDF file, pass it to the application, trigger out-of-bounds read error and read contents of memory on the system.
4) Infinite loop (CVE-ID: CVE-2021-1252)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in the Excel XLM macro parsing module. A remote attacker can consume all available system resources and cause denial of service conditions.
Remediation
Install update from vendor's website.