CVE-2021-20193 : Security Advisory and Response
CVE-2021-20193 found in tar 1.33 allows attackers to consume memory uncontrollably, posing a high risk to system availability. Learn about impacts, technical details, and mitigation strategies.
A flaw was found in the src/list.c of tar 1.33 and earlier versions, allowing an attacker to cause uncontrolled consumption of memory by submitting a crafted input file. The vulnerability poses a significant threat to system availability.
Understanding CVE-2021-20193
This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-20193.
What is CVE-2021-20193?
CVE-2021-20193 is a vulnerability in tar versions 1.33 and earlier that enables malicious actors to exploit a flaw in the src/list.c file, leading to memory consumption issues.
The Impact of CVE-2021-20193
The highest risk associated with CVE-2021-20193 is the potential disruption of system availability due to uncontrolled memory consumption.
Technical Details of CVE-2021-20193
Understanding the vulnerability, affected systems, and exploitation mechanisms.
Vulnerability Description
The vulnerability in tar 1.33 and earlier versions allows attackers to manipulate input files, leading to memory overflow and system instability.
Affected Systems and Versions
Tar versions 1.33 and earlier are susceptible to this vulnerability, potentially impacting systems using these versions.
Exploitation Mechanism
By submitting a specially crafted input file, threat actors can trigger the flaw in src/list.c, resulting in uncontrolled memory consumption.
Mitigation and Prevention
Guidelines to address and prevent the exploitation of CVE-2021-20193.
Immediate Steps to Take
Users are advised to update to a patched version, monitor system resources for unusual behavior, and restrict access to vulnerable systems.
Long-Term Security Practices
Implementing secure coding practices, performing regular security audits, and staying informed about patch releases are crucial for long-term security.
Patching and Updates
Regularly check for security advisories from software providers, apply patches promptly, and maintain an active defense posture against potential threats.