CVE-2021-33367 describes a buffer overflow vulnerability in Freeimage version 3.18.0. This vulnerability allows attackers to cause a denial of service (DoS) when they provide a specially crafted JXR file to the Freeimage library. With a CVSS score of 5.5, categorized as medium severity, organizations must be aware of the potential impacts and take necessary precautions.
Risk to organizations includes disruption of services due to the denial of service condition. Given the ease with which an attacker can exploit this vulnerability, organizations should prioritize patching immediately.
The vulnerability is classified under CWE-125, which corresponds to buffer overflow issues. As there are known exploits available, it is crucial for organizations to assess their risk and implement remediation strategies as soon as possible.
Organizations that utilize Freeimage version 3.18.0 should be particularly vigilant as the impact of this vulnerability can be significant, affecting the availability of systems relying on this library.
Immediate patching or upgrading of the affected software is recommended to mitigate this risk effectively.
Vulnerability Details
The official description of this vulnerability states: 'Buffer Overflow vulnerability in Freeimage v3.18.0 allows attacker to cause a denial of service via a crafted JXR file.' The CVSS score is 5.5, indicating a medium severity level due to the potential for significant availability impact.
Affected product: Freeimage by Freeimage Project. The vulnerability was published on February 22, 2023.
The vulnerability falls under the CWE classification of CWE-125. It is important for organizations to take note of this classification to understand the nature of the issue.
Technical Analysis
The root cause of this vulnerability is a buffer overflow, which occurs when data exceeds the buffer's storage capacity, leading to memory corruption. The attack vector is local, meaning that the attacker needs to have access to the local file system to provide the malicious JXR file.
The attack complexity is low, with no privileges required to exploit the vulnerability. However, user interaction is required, as the crafted file must be opened by the user.
The impact on availability is high, as successful exploitation can lead to a denial of service, rendering the affected application or service unusable.
In terms of confidentiality and integrity impacts, this vulnerability does not affect the confidentiality or integrity of the system, as indicated by the CVSS vector.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant given the potential for service disruption. Organizations that rely on Freeimage for image processing may find their systems vulnerable to denial of service attacks if this issue is not addressed.
This vulnerability matters to organizations as it can severely disrupt operations, especially if Freeimage is a critical component of their infrastructure. The blast radius potential is considerable, potentially affecting multiple services that depend on the library.
The urgency for organizations to address this vulnerability is high due to its medium CVSS score. Organizations should incorporate this into their priority patch cycle to ensure system stability and security.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The only affected version identified is Freeimage v3.18.0. Organizations should upgrade to the latest version to avoid exploitation.
Mitigation & Remediation
To remediate this vulnerability, organizations should apply the latest patches from the Freeimage Project. If patches are not available, consider implementing workarounds by restricting access to the Freeimage library and monitoring for any unusual activity.
Organizations should also review their configurations to ensure they are hardened against potential attacks. Employing strong network controls and monitoring can help mitigate risks.
For a thorough assessment of your security posture, consider engaging in penetration testing to identify and rectify similar weaknesses.
Detection Guidance
Monitor logs for anomalies related to Freeimage file processing, focusing on unusual file access patterns or unexpected crashes. Behavioral anomalies during image processing could indicate attempts to exploit this vulnerability.
Set up network signatures to detect potentially malicious JXR files being accessed or processed by your systems, which may help identify attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-33367 lies in its demonstration of how even medium severity vulnerabilities can lead to substantial operational disruptions if left unaddressed. Security teams should learn from this case by reinforcing their vulnerability management programs.
This incident reflects a pattern where common libraries, such as Freeimage, become attractive targets for attackers seeking to exploit widely used software components. Organizations must ensure continuous monitoring and regular updates of their dependencies.
For further insights on how to bolster your security posture, organizations can review best practices for vulnerability management and consider engaging in vulnerability management programs and conduct regular assessments of their security measures.
Additionally, understanding the implications of vulnerabilities like CVE-2021-33367 can aid in developing a proactive security strategy, including engaging in penetration testing methodology to validate your defenses against similar threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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