CVE-2021-20491 Explained : Impact and Mitigation
Learn about CVE-2021-20491, a vulnerability in IBM Spectrum Protect Server 7.1 and 8.1 that could allow a buffer overflow, impacting system stability. Find mitigation steps here.
IBM Spectrum Protect Server versions 7.1 and 8.1 are vulnerable to a stack-based buffer overflow due to improper bounds checking during command parsing. This could allow an authorized administrator to crash the server by issuing a command with an improper parameter.
Understanding CVE-2021-20491
This section provides insights into the CVE-2021-20491 vulnerability affecting IBM Spectrum Protect Server.
What is CVE-2021-20491?
CVE-2021-20491 is a vulnerability found in IBM Spectrum Protect Server versions 7.1 and 8.1, potentially leading to a stack-based buffer overflow when specific commands are processed without proper parameter validation.
The Impact of CVE-2021-20491
The vulnerability poses a medium-level risk, allowing an attacker to crash the server by exploiting the stack-based buffer overflow. The attack vector is local, and the confidentiality impact is none.
Technical Details of CVE-2021-20491
In this section, we delve deeper into the technical aspects of the CVE-2021-20491 vulnerability.
Vulnerability Description
The vulnerability arises from improper bounds checking during command parsing in IBM Spectrum Protect Server, leading to a stack-based buffer overflow.
Affected Systems and Versions
IBM Spectrum Protect Server versions 7.1 and 8.1 are affected by this vulnerability, impacting systems running these versions.
Exploitation Mechanism
By sending a command with an improper parameter, an authorized admin can trigger a stack-based buffer overflow, potentially crashing the server.
Mitigation and Prevention
To address CVE-2021-20491, proactive steps should be taken to mitigate the risks associated with this vulnerability.
Immediate Steps to Take
Administrators are advised to apply the official fix provided by IBM to prevent exploitation of the stack-based buffer overflow vulnerability.
Long-Term Security Practices
Implement robust security practices, including regular security assessments and ensuring proper input validation to prevent buffer overflow vulnerabilities.
Patching and Updates
Regularly check for security updates and patches released by IBM for Spectrum Protect Server to address vulnerabilities and enhance system security.