CVE-2019-20172 : Vulnerability Insights and Analysis
Learn about CVE-2019-20172, a vulnerability in SerenityOS allowing local users to escalate privileges by manipulating a return address on the kernel stack. Find mitigation steps here.
In SerenityOS, a problem was identified in the Kernel/VM/MemoryManager.cpp file prior to 2019-12-30. This vulnerability allows local users to escalate privileges by manipulating a return address on the kernel stack.
Understanding CVE-2019-20172
This CVE highlights a security issue in SerenityOS that could be exploited by local users to gain elevated privileges.
What is CVE-2019-20172?
CVE-2019-20172 is a vulnerability in the Kernel/VM/MemoryManager.cpp file of SerenityOS that enables local users to escalate their privileges by altering a return address on the kernel stack.
The Impact of CVE-2019-20172
The vulnerability allows local users to exploit the operating system's failure to reject syscalls containing pointers to the kernel's virtual address space, leading to privilege escalation.
Technical Details of CVE-2019-20172
This section provides more in-depth technical information about the vulnerability.
Vulnerability Description
The issue arises from the Kernel/VM/MemoryManager.cpp file in SerenityOS, where the system does not properly reject syscalls with pointers to the kernel's virtual address space, enabling users to manipulate return addresses on the kernel stack.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Versions: N/A
Exploitation Mechanism
Local users can exploit this vulnerability by submitting syscalls containing pointers to the kernel's virtual address space, allowing them to modify return addresses on the kernel stack.
Mitigation and Prevention
To address CVE-2019-20172, follow these mitigation strategies:
Immediate Steps to Take
- Apply relevant patches or updates provided by SerenityOS.
- Monitor system logs for any suspicious activities indicating exploitation of this vulnerability.
Long-Term Security Practices
- Implement the principle of least privilege to restrict user access.
- Regularly update and patch the operating system to prevent known vulnerabilities.
Patching and Updates
Ensure that the system is up to date with the latest security patches and updates to mitigate the risk of exploitation.