CVE-2020-27792 : Vulnerability Insights and Analysis
Learn about CVE-2020-27792, a heap buffer overwrite vulnerability in GhostScript's lp8000_print_page() function, potentially leading to memory corruption or denial of service. Find out affected systems, exploitation details, and mitigation steps.
A heap-based buffer overwrite vulnerability was found in GhostScript's lp8000_print_page() function in the gdevlp8k.c file. This flaw allows an attacker to trigger a heap buffer overflow by tricking a user into opening a crafted PDF file, potentially leading to memory corruption or denial of service.
Understanding CVE-2020-27792
This CVE involves a heap buffer overflow vulnerability in GhostScript's lp8000_print_page() function.
What is CVE-2020-27792?
The vulnerability in GhostScript's lp8000_print_page() function allows an attacker to exploit a heap-based buffer overwrite, potentially causing memory corruption or a denial of service by manipulating a PDF file.
The Impact of CVE-2020-27792
The exploitation of this vulnerability could lead to memory corruption or denial of service, posing a significant risk to affected systems.
Technical Details of CVE-2020-27792
This section provides technical details of the CVE.
Vulnerability Description
- Type: Heap-based buffer overwrite
- Location: lp8000_print_page() function in gdevlp8k.c
- Consequence: Memory corruption or denial of service
Affected Systems and Versions
- Product: Ghostscript
- Affected Versions: Red Hat Enterprise Linux 8
- Unaffected Versions: Ghostscript 9.27, Red Hat Enterprise Linux 6, 9, and Fedora
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Local
- Privileges Required: None
- User Interaction: Required
- Scope: Unchanged
- Base Score: 7.1 (High)
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: High
Mitigation and Prevention
Mitigation steps and long-term security practices to address CVE-2020-27792.
Immediate Steps to Take
- Avoid opening untrusted PDF files
- Implement file integrity checks
- Apply security updates promptly
Long-Term Security Practices
- Regular security training for users
- Implement network segmentation
- Use application whitelisting
Patching and Updates
- Apply the latest security patches for Ghostscript
- Monitor vendor security advisories for updates