CVE-2017-17820 : What You Need to Know
Learn about CVE-2017-17820, a use-after-free vulnerability in Netwide Assembler (NASM) version 2.14rc0, allowing remote attackers to trigger a denial of service attack by mishandling operand-type errors. Find mitigation steps and prevention measures.
A vulnerability exists in the Netwide Assembler (NASM) version 2.14rc0, specifically in the pp_list_one_macro function located in asm/preproc.c. This vulnerability, known as use-after-free, can be exploited remotely to cause a denial of service attack. The vulnerability stems from mishandling operand-type errors.
Understanding CVE-2017-17820
This CVE-2017-17820 vulnerability affects Netwide Assembler (NASM) version 2.14rc0 and can lead to a denial of service attack.
What is CVE-2017-17820?
CVE-2017-17820 is a use-after-free vulnerability in the pp_list_one_macro function of NASM version 2.14rc0, allowing remote attackers to trigger a denial of service attack by mishandling operand-type errors.
The Impact of CVE-2017-17820
The vulnerability can be exploited remotely, potentially leading to a denial of service attack, impacting the availability of the affected systems.
Technical Details of CVE-2017-17820
This section provides more technical insights into the vulnerability.
Vulnerability Description
The use-after-free vulnerability in NASM version 2.14rc0's pp_list_one_macro function can be exploited remotely, causing a denial of service due to mishandling operand-type errors.
Affected Systems and Versions
- Product: Netwide Assembler (NASM)
- Vendor: Not applicable
- Version: 2.14rc0
Exploitation Mechanism
The vulnerability can be exploited remotely by manipulating operand-type errors, triggering a use-after-free condition in the pp_list_one_macro function.
Mitigation and Prevention
Protecting systems from CVE-2017-17820 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by NASM promptly.
- Monitor vendor advisories for updates and mitigation strategies.
Long-Term Security Practices
- Regularly update NASM and other software components to the latest versions.
- Implement secure coding practices to prevent similar vulnerabilities.
- Conduct regular security assessments and audits.
Patching and Updates
- NASM may release patches to address the vulnerability; ensure timely application to secure systems.