CVE-2021-45078 : Security Advisory and Response

CVE-2021-45078 addresses a vulnerability in GNU Binutils through version 2.37 that allows attackers to execute a denial of service attack through a heap-based buffer overflow.

Understanding CVE-2021-45078

What is CVE-2021-45078?

This vulnerability in GNU Binutils enables attackers to trigger a denial of service or potentially have other unspecified impacts by exploiting a heap-based buffer overflow in the stab_xcoff_builtin_type function within stabs.c.

The Impact of CVE-2021-45078

The vulnerability can lead to a denial of service attack or other adverse effects due to an out-of-bounds write, caused by an incorrect fix for a previous CVE, namely CVE-2018-12699.

Technical Details of CVE-2021-45078

Vulnerability Description

The issue lies in the stab_xcoff_builtin_type function in stabs.c in GNU Binutils through version 2.37, which allows for a heap-based buffer overflow, paving the way for a denial of service exploit.

Affected Systems and Versions

Affected versions: GNU Binutils through 2.37

Exploitation Mechanism

The vulnerability can be exploited through an out-of-bounds write, granting attackers the ability to conduct denial of service attacks.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by the vendor promptly
Monitor security advisories for any updates or workarounds
Implement the principle of least privilege to restrict access

Long-Term Security Practices

Regularly update software and libraries to mitigate risks
Conduct security assessments and penetration testing to identify vulnerabilities

Patching and Updates

It is crucial to update GNU Binutils to a non-vulnerable version beyond 2.37 to ensure the security of the system.