CVE-2019-17624 : Exploit Details and Defense Strategies
Learn about CVE-2019-17624, a vulnerability in X.Org X Server version 1.20.4 that allows attackers to trigger a stack-based buffer overflow, potentially leading to application crashes or other impacts. Find mitigation steps and patching information here.
In the X.Org X Server version 1.20.4, a potential security vulnerability has been identified in the XQueryKeymap function, leading to a stack-based buffer overflow. This could be exploited by an attacker to cause an application crash or other unforeseen consequences.
Understanding CVE-2019-17624
This CVE involves a vulnerability in the X.Org X Server version 1.20.4 that could be exploited to trigger a stack-based buffer overflow.
What is CVE-2019-17624?
The vulnerability in the XQueryKeymap function of X.Org X Server version 1.20.4 could allow an attacker to exploit a stack-based buffer overflow by sending ct.c_char multiple times, potentially leading to application crashes or other impacts.
The Impact of CVE-2019-17624
The exploitation of this vulnerability could result in a denial of service (application crash) or other unspecified impacts. It is currently debated whether the X.Org X Server is directly involved in the issue or if it is related to a separate stack overflow.
Technical Details of CVE-2019-17624
This section provides more technical insights into the vulnerability.
Vulnerability Description
A stack-based buffer overflow exists in the XQueryKeymap function of X.Org X Server version 1.20.4, allowing attackers to potentially crash applications or cause other consequences.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Version: 1.20.4 (affected)
Exploitation Mechanism
The vulnerability can be exploited by sending ct.c_char multiple times, up to a count of 1000, which triggers the stack-based buffer overflow.
Mitigation and Prevention
To address CVE-2019-17624, follow these mitigation strategies:
Immediate Steps to Take
- Monitor vendor security advisories for patches
- Implement appropriate firewall rules
- Restrict network access to affected systems
Long-Term Security Practices
- Regularly update software and systems
- Conduct security training for employees
- Perform regular security audits and assessments
Patching and Updates
- Apply patches provided by X.Org X Server promptly