In Artifex Ghostscript through 10.01.0, there is a buffer overflow leading to potential corruption of data internal to the PostScript interpreter, in base/sbcp.c. This vulnerability allows BCPEncode, BCPDecode, TBCPEncode, and TBCPDecode functions to fail when handling escaped characters, resulting in unintended data writes. The CVSS score of 9.8 categorizes this vulnerability as critical, reflecting its potential impact on confidentiality, integrity, and availability.
Risk to organizations includes unauthorized data access and service disruption. Given the critical nature of this vulnerability and its ease of exploitation, organizations should prioritize patching immediately. The vulnerability was published on March 31, 2023, and it is crucial to apply the necessary updates to mitigate risks.
Currently, there are no known exploits available in the wild, but the critical severity and potential for exploitation underscore the urgency for organizations to address this vulnerability promptly. Failure to do so could result in significant operational risks.
Organizations using affected versions of Ghostscript should evaluate their exposure to this vulnerability and take appropriate action by implementing the recommended patches as soon as possible.
Vulnerability Details
The vulnerability identified as CVE-2023-28879 is classified as a buffer overflow affecting Artifex Ghostscript up to version 10.01.0. This specific vulnerability allows for potential corruption of data within the PostScript interpreter. The official CVSS score is 9.8, indicating a critical severity level. The affected components are BCPEncode, BCPDecode, TBCPEncode, and TBCPDecode. The vulnerability was published on March 31, 2023.
Technical Analysis
The root cause of this vulnerability lies in a buffer overflow condition that occurs when the write buffer is filled to one byte less than full, which leads to an incorrect write operation when an escaped character is attempted. This results in the writing of two bytes instead of one, which can corrupt internal data structures.
The attack vector for this vulnerability is network-based, allowing attackers to exploit the flaw remotely without requiring any privileges or user interaction. The complexity of the attack is low, making exploitation straightforward for adversaries.
The impacts associated with this vulnerability include high confidentiality, integrity, and availability risks, as the overflow can affect critical data processed by the Ghostscript interpreter.
Risk & Impact Analysis
Real-world deployment risk is significant due to the widespread use of Ghostscript in various applications. Organizations utilizing affected versions face potential data corruption and unauthorized access, emphasizing the importance of immediate remediation.
The blast radius is considerable, as many applications depend on Ghostscript for PDF processing and rendering. Given the critical vulnerability score and the potential for exploitation, organizations must address this issue with high urgency.
Considering the CVSS score and the absence of known exploits in the wild, organizations should schedule remediation as a high priority.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include all versions of Ghostscript prior to 10.01.0, as well as Debian Linux versions 10.0 and 11.0. Organizations should consider updating to the latest patched versions to ensure protection against this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching immediately. For Ghostscript, update to version 10.01.0 or later. If an immediate patch is not available, consider implementing network controls to limit exposure and monitor for unusual activity. Configuration hardening and strict access controls should also be employed to mitigate risks.
For further security testing, organizations can utilize penetration testing to evaluate their security posture and identify potential weaknesses.
Detection Guidance
Organizations should monitor logs for indicators of unusual activity related to Ghostscript processing. Behavioral anomalies, such as unexpected crashes or performance degradation, may indicate exploitation attempts. Network signatures should be established to detect unauthorized access or data exfiltration activities.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-28879 lies in the critical nature of the vulnerability and its potential impact on organizations utilizing Ghostscript. This vulnerability represents a broader trend of buffer overflow issues in software, highlighting the need for comprehensive security practices.
Security teams should learn from this incident to strengthen their vulnerability management programs and prioritize regular updates and security assessments.
For insights on vulnerability management, organizations can refer to our blog on vulnerability management programs, which provides strategies to enhance security posture.
Additionally, exploring our services can help organizations adopt a proactive stance against potential threats, such as through our offerings in red teaming and continuous security testing.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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