CVE-2021-33454 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-33454, a NULL pointer dereference vulnerability in yasm version 1.3.0, leading to denial of service. Learn about affected systems, exploitation, and mitigation.
An issue was discovered in yasm version 1.3.0 that leads to a NULL pointer dereference in yasm_expr_get_intnum() in libyasm/expr.c.
Understanding CVE-2021-33454
This CVE refers to a vulnerability identified in yasm version 1.3.0, specifically in the yasm_expr_get_intnum() function in libyasm/expr.c file.
What is CVE-2021-33454?
The CVE-2021-33454 is a NULL pointer dereference vulnerability found in yasm version 1.3.0, affecting the yasm_expr_get_intnum() function.
The Impact of CVE-2021-33454
The impact of this vulnerability allows attackers to potentially crash the application, leading to a denial of service (DoS) condition.
Technical Details of CVE-2021-33454
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability involves a NULL pointer dereference in the yasm_expr_get_intnum() function in libyasm/expr.c, present in yasm version 1.3.0.
Affected Systems and Versions
The affected version is yasm 1.3.0.
Exploitation Mechanism
By triggering the NULL pointer dereference in the yasm_expr_get_intnum() function, attackers can achieve a DoS condition.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate and prevent exploitation of this vulnerability.
Immediate Steps to Take
Users are advised to update to a patched version of yasm to prevent the exploitation of this vulnerability.
Long-Term Security Practices
To enhance security, always keep software and libraries up to date, perform regular security audits, and follow secure coding practices.
Patching and Updates
Ensure timely application of security patches and updates to mitigate the risks associated with CVE-2021-33454.