CVE-2018-19974 : Exploit Details and Defense Strategies
Learn about CVE-2018-19974 affecting YARA 3.8.1, allowing attackers to access uninitialized data from VM scratch memory, potentially revealing real stack addresses. Find mitigation steps and prevention measures.
YARA 3.8.1 allows attackers to access uninitialized data from the VM scratch memory, potentially revealing real stack addresses.
Understanding CVE-2018-19974
YARA 3.8.1 vulnerability exposes uninitialized data from the VM scratch memory, enabling attackers to identify real stack addresses.
What is CVE-2018-19974?
YARA 3.8.1 contains a flaw where specially crafted compiled rules can read uninitialized data from the VM scratch memory, allowing attackers to discover real stack addresses.
The Impact of CVE-2018-19974
The vulnerability in YARA 3.8.1 could lead to attackers identifying addresses in the actual stack, different from the YARA virtual stack.
Technical Details of CVE-2018-19974
YARA 3.8.1 vulnerability details and affected systems.
Vulnerability Description
The bytecode in a compiled rule in YARA 3.8.1 can access uninitialized data from the VM scratch memory in libyara/exec.c.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
Attackers can exploit this vulnerability to access uninitialized data from the VM scratch memory, potentially revealing real stack addresses.
Mitigation and Prevention
Steps to mitigate and prevent CVE-2018-19974.
Immediate Steps to Take
- Update YARA to the latest version to patch the vulnerability.
- Monitor for any unusual activities on the system.
Long-Term Security Practices
- Regularly update and patch all software to prevent vulnerabilities.
- Implement strong access controls and network segmentation.
Patching and Updates
Ensure timely installation of security patches and updates to mitigate the risk of exploitation.