CVE-2024-29507 is a stack-based buffer overflow vulnerability identified in Artifex Ghostscript versions before 10.03.0. The flaw is triggered by specially crafted inputs to the CIDFSubstPath and CIDFSubstFont parameters, which are used internally by Ghostscript to substitute font paths and font names during document processing. Due to insufficient bounds checking, these parameters can overflow a stack buffer, potentially allowing an attacker to overwrite adjacent memory on the stack. This can lead to unpredictable behavior including application crashes or, in some cases, code execution. The vulnerability does not require any privileges to exploit but does require user interaction, such as opening or processing a maliciously crafted PostScript or PDF file that leverages these parameters. The vulnerability is classified under CWE-120 (Classic Buffer Overflow), a common and well-understood class of memory corruption bugs. The CVSS v3.1 base score is 5.4, reflecting network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The impact affects integrity and availability but not confidentiality, as the attacker cannot directly read sensitive data. No public exploits or active exploitation campaigns have been reported to date. Ghostscript is widely used in various operating systems and environments for rendering or converting PostScript and PDF files, including print servers, document management systems, and embedded devices. The lack of an official patch link suggests that users should monitor Artifex's official channels for updates or consider upgrading to version 10.03.0 or later where this issue is resolved.

The primary impact of CVE-2024-29507 is on the integrity and availability of systems running vulnerable versions of Ghostscript. Successful exploitation can cause application crashes, leading to denial of service conditions in document processing workflows. In some scenarios, the buffer overflow could be leveraged to execute arbitrary code, potentially allowing attackers to execute malicious payloads with the privileges of the Ghostscript process. This could compromise systems that rely on Ghostscript for automated document rendering or printing, including enterprise print servers, web applications that convert or render PDFs, and embedded devices using Ghostscript libraries. The requirement for user interaction limits the scope somewhat, but phishing or malicious document delivery remain viable attack vectors. Organizations processing untrusted or user-submitted documents are particularly at risk. Disruption of document processing can affect business continuity, especially in sectors relying heavily on automated document workflows such as finance, legal, and government. The absence of known exploits reduces immediate risk, but the vulnerability’s medium severity and ease of exploitation warrant proactive mitigation.

Organizations should prioritize upgrading to Artifex Ghostscript version 10.03.0 or later, where this vulnerability is fixed. Until patches are applied, implement strict input validation and sanitization on documents processed by Ghostscript, especially those received from untrusted sources. Employ sandboxing or containerization to isolate Ghostscript processes, limiting the impact of potential exploitation. Disable or restrict the use of CIDFSubstPath and CIDFSubstFont parameters if possible, or configure Ghostscript to run with minimal privileges. Monitor logs for crashes or unusual behavior in document processing systems as indicators of attempted exploitation. Use network-level protections such as email filtering and endpoint security solutions to reduce the likelihood of malicious document delivery. Maintain up-to-date backups of critical systems to enable recovery in case of denial of service or compromise. Finally, stay informed via official Artifex security advisories for patches and further guidance.