SB2023100301 - Debian update for exim4
Published: October 3, 2023 Updated: September 6, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2023-42114)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when handling NTLM challenge requests. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system.
2) Out-of-bounds write (CVE-ID: CVE-2023-42115)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when handling AUTH command. A remote non-authenticated attacker can send specially crafted data to the server, trigger an out-of-bounds write and execute arbitrary code on the target system.
3) Stack-based buffer overflow (CVE-ID: CVE-2023-42116)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when handling NTLM challenge requests. A remote unauthenticated attacker can send specially crafted data to the server, trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Remediation
Install update from vendor's website.