IBM Spectrum Protect Server versions 7.1 and 8.1 are subject to a stack-based buffer overflow caused by improper bounds checking during the parsing of commands. An authorized administrator could exploit this vulnerability by issuing a command with an improper parameter, potentially leading to a server crash. This vulnerability has been assigned the IBM X-Force ID: 197792.
With a CVSS score of 4.4, this vulnerability is classified as medium severity, indicating that while it requires high privileges to exploit, the potential for a denial-of-service condition poses a risk to ongoing operations. Organizations utilizing IBM Spectrum Protect should prioritize addressing this vulnerability in their patch cycles.
Risk to organizations includes potential downtime and disruption of backup and recovery operations, which are critical for maintaining data integrity and availability. The urgency for defenders is moderate; organizations should schedule remediation as part of their regular maintenance.
As of the current date, there are no known exploits or public proof-of-concept code available for this vulnerability, reducing the immediate threat level. However, organizations should remain vigilant, as the absence of known exploits does not eliminate the risk of future exploitation.
Vulnerability Details
The vulnerability in question allows for a stack-based buffer overflow due to improper bounds checking. The CVSS vector string for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H, indicating a local attack vector, low attack complexity, and high privileges required for exploitation. The availability impact is rated as high, which further highlights the critical nature of this issue.
The affected products are IBM Spectrum Protect Server versions 7.1 (up to 7.1.12) and 8.1 (up to 8.1.10). The vulnerability was published on April 16, 2021, and is classified under CWE-787: Out-of-bounds Write.
Technical Analysis
The root cause of the vulnerability lies in improper bounds checking during command parsing, which can lead to a buffer overflow. The attack vector is local, meaning that an attacker must have access to the local network or system where the IBM Spectrum Protect Server is running. The attack complexity is low, suggesting that executing the exploit does not require advanced skills.
The privileges required for exploitation are high, as an attacker must be an authorized administrator. No user interaction is required, making this vulnerability particularly concerning, as an administrator could unwittingly trigger the overflow.
The confidentiality impact is none, and the integrity impact is also none, but the availability impact is high, as the server could crash and disrupt services. Organizations should ensure that their security policies are robust enough to prevent unauthorized access to administrative functions.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is significant, particularly for organizations that rely on IBM Spectrum Protect for data backup and recovery. If successfully exploited, the resulting downtime could hinder business operations, potentially affecting compliance and recovery efforts.
Organizations should consider the blast radius; if an attacker gains administrative access, they could disrupt backup services across multiple systems. The urgency assessment based on CVSS suggests that this vulnerability should be addressed in priority patch cycles.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of IBM Spectrum Protect include all versions prior to vendor patch, specifically versions 7.1.0.000 to 7.1.12 and 8.1.0.000 to 8.1.10.100. The specific version 8.1.11.000 is also vulnerable.
Mitigation & Remediation
Organizations should prioritize patching their IBM Spectrum Protect Server installations immediately to mitigate the risks associated with this vulnerability. The relevant patches can be found in the IBM support portal. For those unable to apply the patch immediately, it is advised to implement robust access controls and monitor for any unusual administrative activity.
In addition, organizations can benefit from regular security assessments and penetration testing to identify and remediate vulnerabilities proactively. For more information on how to conduct these assessments, organizations are encouraged to refer to penetration testing services.
Detection Guidance
Monitoring logs for indicators of unauthorized access or command execution can help detect potential exploitation attempts. Behavioral anomalies in the system's operation, such as unexpected crashes or performance degradation, should also be closely observed.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-20491 lies in its representation of common vulnerabilities that arise from improper input validation. This incident serves as a reminder for security teams to prioritize secure coding practices and conduct thorough testing against common attack vectors.
Organizations can leverage insights from this vulnerability to strengthen their overall security architecture and response strategies. For comprehensive security testing frameworks, organizations may consider exploring penetration testing methodologies and vulnerability management programs to ensure a robust defense against such vulnerabilities.
In conclusion, CVE-2021-20491 highlights the critical need for proactive security measures and the importance of addressing known vulnerabilities promptly.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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