A NULL pointer dereference vulnerability was found in Ghostscript, which occurs when it tries to render a large number of bits in memory. When allocating a buffer device, it relies on an init_device_procs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, mem_x_device is used and does not have an init_device_procs defined. This flaw allows an attacker to parse a large number of bits (more than 64 bits per pixel), which triggers a NULL pointer dereference flaw, causing an application to crash.
The CVSS score of this vulnerability is 5.5, classified as medium severity. The attack vector is local with low complexity, meaning that exploitation requires no privileges and user interaction is needed. The potential impact includes high availability loss, which may disrupt services relying on Ghostscript.
This vulnerability allows attackers to crash applications, affecting their availability. Organizations using affected versions of Ghostscript, particularly those integrated within Fedora environments, should prioritize patching immediately to mitigate potential disruptions.
Given the nature of this vulnerability and the potential for disruption, organizations must act swiftly to implement the necessary updates and maintain operational integrity.
Vulnerability Details
The CVE-2022-2085 vulnerability was published on June 16, 2022, and is classified under CWE-476. The affected products include Ghostscript version 9.55.0 and Fedora versions 35 and 36. It is essential for organizations operating these systems to stay informed about the latest patches and updates.
Technical Analysis
The root cause of CVE-2022-2085 lies in how Ghostscript handles memory allocation for rendering a large number of bits. When the number of bits per pixel exceeds 64, the application fails to properly initialize device processes, leading to a NULL pointer dereference.
The attack vector is local, requiring an attacker to have access to the system where Ghostscript is running. The attack complexity is low, as no elevated privileges are needed to exploit this vulnerability. However, user interaction is necessary, as the attacker would need to trigger the rendering process in a vulnerable application.
The impacts of this vulnerability include potential high availability loss, as applications relying on Ghostscript may crash unexpectedly when the vulnerability is triggered. There is no confidentiality or integrity impact associated with this flaw.
Risk & Impact Analysis
Organizations should assess the deployment of Ghostscript and its integration within applications. The risk associated with this vulnerability is medium due to the availability impact, which may result in service disruptions. The urgency for organizations to address this vulnerability is high, given the potential for crashing critical applications.
With the CVSS score indicating a medium severity, organizations are advised to address this vulnerability in their priority patch cycle. This proactive approach can help prevent potential disruptions and maintain service availability.
Organizations that fail to patch may face increased risks of downtime, which could affect business operations and customer satisfaction.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects Ghostscript version 9.55.0 and Fedora versions 35 and 36. Organizations using these versions should ensure they apply the necessary patches to mitigate the risk associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching Ghostscript to address CVE-2022-2085. For those unable to immediately apply patches, temporary workarounds include disabling features that rely on the affected functionality. Regular monitoring and audits of applications using Ghostscript are also recommended.
For detailed guidance on penetration testing and vulnerability assessments, organizations can refer to our penetration testing services to validate their security posture.
Detection Guidance
Monitoring logs for anomalies associated with Ghostscript processing and analyzing application crashes can serve as key indicators of potential exploitation of this vulnerability. Security teams should also look for unexpected resource consumption patterns that may suggest abuse.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-2085 is highlighted by its potential to cause service disruptions in applications reliant on Ghostscript for rendering. As organizations increasingly depend on such technologies, understanding and mitigating vulnerabilities becomes critical.
Security teams should take note of the patterns this vulnerability represents, particularly how improper memory management can lead to severe application failures. As a strategic defensive takeaway, organizations must prioritize thorough testing and validation of third-party components in their software stack.
For further reading on vulnerability management best practices, consider exploring our vulnerability management program, which provides insights into effective strategies.
Additionally, organizations involved with application security should review strategies for effective penetration testing methodology to identify similar vulnerabilities in their systems.
Finally, organizations are encouraged to follow updates related to vulnerabilities in Ghostscript to maintain a proactive security stance.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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