CVE-2018-10191 Explained : Impact and Mitigation
Learn about CVE-2018-10191, an integer overflow flaw in mruby versions, including 1.4.0, allowing attackers to execute arbitrary code. Find mitigation steps and prevention measures here.
An integer overflow vulnerability has been discovered in mruby versions, including 1.4.0, specifically in the src/vm.c::mrb_vm_exec() function. This flaw can be exploited by attackers to execute arbitrary code.
Understanding CVE-2018-10191
This CVE identifies a critical vulnerability in mruby that could lead to a use-after-free situation when handling certain operations.
What is CVE-2018-10191?
CVE-2018-10191 is an integer overflow vulnerability in mruby versions, including 1.4.0, that arises from deep scope nesting and the handling of specific operations in the src/vm.c::mrb_vm_exec() function.
The Impact of CVE-2018-10191
This vulnerability allows attackers to potentially execute arbitrary code by exploiting the use-after-free situation caused by the integer overflow in mruby.
Technical Details of CVE-2018-10191
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
An integer overflow occurs in src/vm.c::mrb_vm_exec() in mruby versions, including 1.4.0, when processing OP_GETUPVAR and deep scope nesting, leading to a use-after-free scenario.
Affected Systems and Versions
- Affected Version: mruby 1.4.0
- Other affected versions: n/a
Exploitation Mechanism
The vulnerability can be exploited by executing Ruby code, allowing attackers to potentially run arbitrary code on the affected system.
Mitigation and Prevention
Protecting systems from CVE-2018-10191 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the security update provided by mruby to patch the vulnerability.
- Monitor for any unusual Ruby code execution on the system.
Long-Term Security Practices
- Regularly update mruby to the latest secure versions.
- Implement code review processes to detect and prevent similar vulnerabilities.
- Employ runtime protections to mitigate exploitation risks.
Patching and Updates
Ensure timely patching of mruby to address the integer overflow vulnerability and prevent potential exploitation.