CVE-2017-6966 Explained : Impact and Mitigation
Learn about CVE-2017-6966 affecting GNU Binutils version 2.28's readelf tool, leading to a use-after-free error in processing MSP430 binaries. Find mitigation steps and prevention measures.
The GNU Binutils version 2.28's readelf tool has a use-after-free vulnerability when processing multiple relocated sections in an MSP430 binary.
Understanding CVE-2017-6966
This CVE involves a specific error in the readelf tool of GNU Binutils version 2.28 that can lead to a use-after-free condition.
What is CVE-2017-6966?
The vulnerability in the readelf tool of GNU Binutils version 2.28 allows for a use-after-free (specifically read-after-free) error when handling multiple relocated sections in an MSP430 binary. The issue arises from mishandling an invalid symbol index and state management during different program executions.
The Impact of CVE-2017-6966
The vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial of service by crashing the application.
Technical Details of CVE-2017-6966
The technical aspects of the vulnerability in GNU Binutils version 2.28's readelf tool.
Vulnerability Description
The vulnerability is a use-after-free error that occurs when processing multiple relocated sections in an MSP430 binary due to mishandling of an invalid symbol index and state management.
Affected Systems and Versions
- Affected System: GNU Binutils version 2.28
- Affected Tool: readelf
- Affected Binary: MSP430
Exploitation Mechanism
The vulnerability can be exploited by crafting a malicious MSP430 binary with specific relocated sections to trigger the use-after-free error.
Mitigation and Prevention
Ways to mitigate and prevent the exploitation of CVE-2017-6966.
Immediate Steps to Take
- Update GNU Binutils to a patched version that addresses the use-after-free vulnerability.
- Avoid processing untrusted MSP430 binaries with the vulnerable readelf tool.
Long-Term Security Practices
- Regularly update software and tools to the latest secure versions.
- Implement code reviews and security testing to identify and fix similar vulnerabilities.
Patching and Updates
- Apply patches provided by GNU Binutils to fix the use-after-free vulnerability in the readelf tool.