CVE-2018-20457 : Vulnerability Insights and Analysis
Learn about CVE-2018-20457, a vulnerability in radare2 versions 3.1.3 and earlier, allowing denial-of-service attacks by crafting specific arm assembly inputs. Find mitigation steps and affected systems here.
This CVE-2018-20457 article provides insights into a vulnerability found in radare2 versions 3.1.3 and earlier, affecting the assemble function in libr/asm/p/asm_arm_cs.c, potentially leading to a denial-of-service attack.
Understanding CVE-2018-20457
This section delves into the details of the CVE-2018-20457 vulnerability.
What is CVE-2018-20457?
CVE-2018-20457 is a vulnerability in radare2 versions 3.1.3 and prior, specifically in the assemble function within libr/asm/p/asm_arm_cs.c. Attackers can exploit this flaw to trigger a denial-of-service attack by creating a specially crafted arm assembly input. The vulnerability arises from incorrect index usage in the armass.c loop and the absence of certain length validation in armass64.c.
The Impact of CVE-2018-20457
The vulnerability allows attackers to cause a denial-of-service attack, leading to the application crashing. This issue is related to CVE-2018-20459.
Technical Details of CVE-2018-20457
This section provides technical details of the CVE-2018-20457 vulnerability.
Vulnerability Description
The vulnerability in radare2 versions 3.1.3 and earlier resides in the assemble function within libr/asm/p/asm_arm_cs.c, enabling attackers to trigger a denial-of-service attack by crafting a specific arm assembly input.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: All versions from 3.1.3 and earlier
Exploitation Mechanism
The vulnerability is exploited by creating a specially designed arm assembly input, taking advantage of an incorrect index usage in armass.c and the absence of certain length validation in armass64.c.
Mitigation and Prevention
In this section, we discuss mitigation strategies for CVE-2018-20457.
Immediate Steps to Take
- Update radare2 to a version that includes a patch for the vulnerability.
- Implement proper input validation to prevent crafted arm assembly inputs.
Long-Term Security Practices
- Regularly update software to the latest versions to address known vulnerabilities.
- Conduct security audits and code reviews to identify and mitigate similar issues.
Patching and Updates
Ensure timely application of patches and updates provided by radare2 to address the vulnerability.