CVE-2019-20382 : Vulnerability Insights and Analysis
Learn about CVE-2019-20382 affecting QEMU 4.1.0 due to a memory leak in zrle_compress_data during VNC disconnect operations. Find mitigation steps and preventive measures here.
QEMU 4.1.0 has a memory leak in zrle_compress_data during a VNC disconnect operation due to misusing libz, leading to memory not being properly freed. This vulnerability has been assigned CVE-2019-20382.
Understanding CVE-2019-20382
What is CVE-2019-20382?
QEMU 4.1.0 experiences a memory leak in the zrle_compress_data function in ui/vnc-enc-zrle.c during a VNC disconnect operation, caused by incorrect memory deallocation.
The Impact of CVE-2019-20382
The vulnerability results in a memory leak due to improper freeing of memory allocated in deflateInit2 when deflateEnd is called.
Technical Details of CVE-2019-20382
Vulnerability Description
The issue arises from the incorrect usage of libz in the zrle_compress_data function, leading to a memory leak in QEMU 4.1.0.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Version: n/a
Exploitation Mechanism
The memory leak occurs when memory allocated in deflateInit2 is not properly released when deflateEnd is called.
Mitigation and Prevention
Immediate Steps to Take
- Apply the patches provided by the respective vendors to address the memory leak vulnerability.
- Monitor vendor advisories for updates and apply them promptly.
Long-Term Security Practices
- Regularly update and patch software to mitigate potential vulnerabilities.
- Implement secure coding practices to prevent memory leaks and other security issues.
Patching and Updates
Ensure that QEMU is updated to a version where the memory leak issue has been resolved.