CVE-2021-3272 is a medium severity vulnerability found in the Jasper library version 2.0.24, specifically in the jp2_decode function located in jp2/jp2_dec.c. This vulnerability allows for a heap-based buffer over-read when there is an invalid relationship between the number of channels and the number of image components. The CVSS score for this vulnerability is 5.5, indicating a medium severity level.
The implications of this vulnerability are significant, as it could lead to unauthorized access and disruption of service. Organizations using affected versions of Jasper in their Fedora systems should be aware of the risk this poses, particularly in environments where the library is utilized for processing images.
Currently, this vulnerability is not included in the Known Exploited Vulnerabilities (KEV) catalog, indicating that there is no widespread active exploitation known. However, organizations should be proactive in monitoring for any potential exploits. Given the severity and nature of the vulnerability, organizations should prioritize patching immediately.
In light of the potential for exploitation, it is crucial for security teams to assess their environments for the presence of vulnerable versions and to take necessary remediation steps to mitigate risk.
Vulnerability Details
The official CVE description states that the issue occurs in the jp2_decode function of the libjasper library. The vulnerability type is classified as a heap-based buffer over-read, specifically categorized under CWE-125. The CVSS version is 3.1, with a vector string indicating a local attack vector and low attack complexity. The attack requires no privileges but does require user interaction.
The vulnerability was published on January 27, 2021, and affects Jasper version 2.0.24 and Fedora versions 32 and 33. The potential impact on availability is high, while confidentiality and integrity impacts are none.
Technical Analysis
The root cause of CVE-2021-3272 lies in how the jp2_decode function processes image components without proper validation of the relationship between the number of channels and components. This lack of validation can lead to a heap-based buffer over-read, which may allow an attacker to manipulate the application’s memory state.
The attack vector is local, meaning that an attacker would need access to the system running the affected application. The complexity of exploiting this vulnerability is low, and no privileges are required to trigger it. However, user interaction is necessary, as the attacker must convince the user to process a malicious image that triggers the vulnerability.
In terms of impact, if successfully exploited, this vulnerability could lead to a denial of service, impacting the availability of the application. Organizations should be vigilant in monitoring for any signs of exploitation and should be prepared to respond to incidents effectively.
Risk & Impact Analysis
The real-world risk associated with CVE-2021-3272 is significant for organizations using the affected versions of Jasper in their image processing workflows. The potential for a denial of service due to the heap-based buffer over-read can disrupt operations and impact service availability.
Given the steps required for exploitation, the blast radius may be limited to systems where the vulnerable library is deployed. However, the ease of triggering the vulnerability through user interaction poses a threat that organizations cannot afford to ignore. Organizations should assess their environments for any instances of Jasper 2.0.24 and prioritize patching as part of their immediate remediation strategy.
Based on the CVSS score of 5.5, organizations should address this vulnerability in their priority patch cycle, ensuring that all affected systems are updated to the latest available versions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The versions affected by CVE-2021-3272 include Jasper 2.0.24 and Fedora versions 32 and 33. Organizations running these versions should take immediate steps to upgrade.
Mitigation & Remediation
Organizations should update to the latest patched version of Jasper and Fedora to mitigate the risk associated with this vulnerability. If immediate patching is not feasible, consider implementing network controls to limit exposure and monitoring for unusual activity related to image processing.
For further assistance, organizations may consider engaging in penetration testing to identify any other vulnerabilities in their systems.
Detection Guidance
Monitoring log files for indicators of exploitation is essential. Look for anomalies in image processing requests that may indicate attempts to exploit this vulnerability. Additionally, network signatures related to the use of the jp2_decode function may be helpful in identifying potential attacks.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-3272 underscores the importance of thorough validation when processing user inputs, particularly in image processing applications. This vulnerability exemplifies how improper handling of image data can lead to severe consequences.
Security teams should adopt a proactive approach in identifying and remediating similar vulnerabilities across their applications. Implementing comprehensive testing and validation processes can prevent such issues from arising in the future.
For further insights on secure coding practices, organizations can refer to our guide on secure coding practices and how to mitigate risks associated with vulnerabilities like CVE-2021-3272.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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