A stack exhaustion issue was discovered in FreeImage before version 1.18.0 via the Validate function in PluginRAW.cpp. This vulnerability has a CVSS score of 6.5, categorizing it as medium severity. The potential for high availability impact means that organizations must consider this vulnerability seriously.
The risk to organizations includes disruptions to service availability, which could be exploited by malicious actors. Although a public exploit has not been confirmed, the nature of the vulnerability warrants attention, as stack exhaustion can lead to system crashes and service unavailability.
Organizations should prioritize patching immediately. It is essential to update to the latest version of FreeImage to ensure that this vulnerability is addressed effectively.
The vulnerability was classified under CWE-787, indicating a potential for denial of service due to stack exhaustion. This classification highlights the technical nature of the issue and the need for organizations to be proactive in their security measures.
Vulnerability Details
According to the CVE description, the vulnerability exists within the Validate function of FreeImage, making it susceptible to stack exhaustion. The impact of this vulnerability is categorized as high for availability, meaning that it can lead to significant downtime if exploited.
With a CVSS score of 6.5, the vulnerability is rated as medium severity, emphasizing the importance of addressing it promptly. The affected product is FreeImage, an open-source image processing library, and the vulnerability affects all versions prior to 1.18.0.
Technical Analysis
The root cause of this vulnerability is a flaw in how FreeImage handles certain inputs in the Validate function. Attackers could potentially exploit this by sending specially crafted inputs that cause the application to exhaust its stack space.
The attack vector is network-based, meaning that no physical access to the machine is required. The attack complexity is rated as low, and no privileges are required to launch the attack. User interaction is required, as the malicious input must be processed by the application.
The vulnerability does not impact confidentiality or integrity, but it significantly affects availability, which is a critical aspect for any operational system.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is substantial. Organizations using FreeImage need to understand that the availability of their services could be compromised, leading to potential financial losses and damage to reputation.
The blast radius for this vulnerability can extend beyond just the affected application, potentially impacting other systems that rely on its functionality. Given that exploitation requires user interaction, organizations should also educate their users on the risks associated with using untrusted inputs.
With a CVSS score indicating medium severity, organizations should address this vulnerability in their priority patch cycle. The urgency for remediation is underscored by the potential for significant availability disruptions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of FreeImage are all prior to 1.18.0. Organizations should ensure they are using the latest version to mitigate the risk associated with this vulnerability.
Mitigation & Remediation
Organizations should update to FreeImage version 1.18.0 or later to remediate this vulnerability effectively. In cases where immediate patching is not possible, consider implementing network controls to limit exposure to potential exploitation.
Configuration hardening practices should also be employed, along with continuous monitoring for unusual activity that may indicate attempts to exploit this vulnerability.
Regular penetration testing can help identify weaknesses in the system and ensure that all vulnerabilities are addressed.
Detection Guidance
Monitoring for log indicators related to the Validate function will be crucial. Look for any abnormal behavior or crashes that might indicate attempts to exploit the stack exhaustion vulnerability.
Behavioral anomalies within the application should also be flagged for further investigation. Setting up network signatures that detect unusual requests can aid in early detection of exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-40262 lies in its potential to disrupt services in applications relying on FreeImage for image processing. Security teams need to remain vigilant as attackers often target known vulnerabilities in widely used libraries.
This vulnerability represents a pattern where low complexity vulnerabilities can lead to significant impacts, especially when user interaction is involved.
Organizations should take this as a strategic reminder of the importance of maintaining updated software and conducting regular security assessments.
A robust vulnerability management program is essential for identifying, prioritizing, and addressing vulnerabilities before they can be exploited.
Continuous security testing will ensure that organizations remain aware of their security posture and can respond to emerging threats effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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