A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
The vulnerability is classified as medium severity with a CVSS score of 5.5. This indicates a significant impact on system availability, which is critical for organizations utilizing QEMU. Given the potential for service disruption, organizations should prioritize patching immediately.
As of now, there is no known public exploit for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) database. However, the nature of the flaw presents a risk that could be exploited in the future, making timely remediation essential.
Organizations operating in environments that utilize QEMU should assess their systems for this vulnerability and implement the necessary updates as soon as possible.
Vulnerability Details
This vulnerability allows a stack overflow through an infinite recursion problem in the eepro100 i8255x device emulator of QEMU. The vulnerability's CVSS score is 5.5, indicating a medium severity level. The flaw can lead to denial of service, affecting system availability.
Technical Analysis
The root cause of this vulnerability is a stack overflow that occurs due to infinite recursion in the QEMU emulator when processing controller commands. This issue can lead to excessive CPU consumption and may crash the QEMU process on the host.
The attack vector is local, requiring low complexity with low privileges and no user interaction necessary. The vulnerability has a high impact on availability, while confidentiality and integrity impacts are nonexistent.
Risk & Impact Analysis
Risk to organizations includes potential denial of service attacks that could disrupt critical operations. This vulnerability poses a significant threat to system availability, especially for those relying on QEMU for virtualization and emulation tasks.
Organizations should assess their exposure to this vulnerability and prioritize remediation efforts based on their operational context and reliance on affected systems.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of QEMU, including Debian Linux 9.0 and later versions. Organizations should ensure they are using patched versions of these products.
Mitigation & Remediation
Organizations should apply patches to their QEMU installations immediately. For additional guidance on penetration testing and vulnerability management, organizations may refer to penetration testing services to validate their remediation efforts.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual CPU usage patterns and any anomalies related to the QEMU process. Implementing network signatures that can identify attempts to invoke this vulnerability may also be beneficial.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of maintaining up-to-date virtual environments. Organizations should regularly review their virtualization solutions and ensure they are not exposed to known vulnerabilities.
Security teams can benefit from incorporating continuous security testing practices, including regular vulnerability assessments. For further insights on best practices, they may consult penetration testing methodology and explore adaptation strategies for cloud environments, such as those detailed in cloud penetration testing guide to enhance their defenses against future vulnerabilities.
By staying informed about vulnerabilities and their remediation strategies, organizations can minimize their risk exposure and maintain a robust security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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