CVE-2017-8291 is a high-severity vulnerability affecting Artifex Ghostscript, published on April 27, 2017. This vulnerability allows -dSAFER bypass and remote command execution via .rsdparams type confusion when processing crafted .eps documents. The existence of this vulnerability poses a significant risk to organizations utilizing vulnerable versions of Ghostscript.
The CVSS score for this vulnerability is 7.8, indicating high severity. The attack vector is local, requiring user interaction, and the impact on confidentiality, integrity, and availability is rated as high. This raises concerns about the potential for unauthorized access and system compromise.
This vulnerability has been actively exploited in the wild, underscoring the urgency for organizations to address it. Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability.
Given the high-profile nature of this vulnerability and its presence in the Known Exploited Vulnerabilities (KEV) catalog, security teams must remain vigilant and ensure their systems are updated to the latest versions, as specified by the vendor.
Vulnerability Details
The vulnerability in question allows for a bypass of the -dSAFER security feature in Ghostscript. This occurs through a type confusion vulnerability in .rsdparams, specifically when crafted .eps documents are processed. The exploit leverages the substring "/OutputFile (%pipe%", enabling remote command execution.
The CVSS score of 7.8 reflects the high impact this vulnerability can have on affected systems. It is crucial for organizations to understand that the vulnerability affects all versions of Artifex Ghostscript prior to the vendor's patch release.
Technical Analysis
The root cause of CVE-2017-8291 arises from improper handling of input types in Ghostscript, leading to the ability for attackers to execute arbitrary commands. The attack vector is local, necessitating user interaction to trigger the vulnerability. The attack complexity is low, as it does not require any advanced skills or knowledge.
This vulnerability requires no privileges to exploit, meaning that any user with access to the Ghostscript application can potentially trigger it, provided they can supply a crafted .eps document. The potential consequences include significant confidentiality, integrity, and availability impacts, making this a serious issue for organizations.
Risk & Impact Analysis
Organizations utilizing affected versions of Ghostscript face substantial risks. The ability to execute arbitrary commands could lead to unauthorized access to sensitive data, system manipulation, or complete system compromise. The broad applicability of this vulnerability across different platforms increases the potential blast radius of an exploit.
Given the high CVSS score and the fact that this vulnerability is included in the KEV catalog, organizations must address this issue urgently. Patching should be prioritized to prevent exploitation and mitigate the associated risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The vulnerable versions of Artifex Ghostscript are all versions prior to 9.21. This includes numerous distributions such as Debian Linux 8.0 and various versions of Red Hat Enterprise Linux (6.0, 7.0, 7.3, 7.4, 7.5, 7.6, 7.7). Organizations should ensure they are running patched versions to mitigate this risk.
Mitigation & Remediation
To mitigate the risks associated with CVE-2017-8291, organizations should apply available patches and updates as per vendor instructions. For Artifex Ghostscript, upgrading to version 9.21 or later is critical to eliminate the vulnerability.
Organizations should also consider implementing additional security measures, such as restricting access to the Ghostscript application and monitoring for suspicious activity that may indicate exploitation attempts.
For thorough testing and validation of security controls, organizations may benefit from engaging in penetration testing to identify any other potential weaknesses.
Detection Guidance
Security teams should look out for specific log indicators that may suggest attempts to exploit this vulnerability. Monitoring for unusual command executions and behavioral anomalies related to Ghostscript can help identify potential exploitation.
Furthermore, network signatures that indicate the use of crafted .eps documents should be established to enhance detection capabilities.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2017-8291 lies in its demonstration of how type confusion vulnerabilities can lead to severe security risks. Organizations must remain vigilant and update their systems regularly to avoid similar vulnerabilities in the future.
This incident highlights the importance of implementing robust application security practices, particularly in environments where document processing is prevalent. Security teams should continuously evaluate their security postures and adopt proactive measures.
For more information on securing applications and systems against vulnerabilities, organizations can refer to guidance on vulnerability management programs and best practices for effective security assessments.
Additionally, engaging in penetration testing methodology can provide further insights into vulnerabilities and how to address them effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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