Ghostscript up to 9.27 .pdfexectoken PostScript File access control

Summaryinfo

A vulnerability described as critical has been identified in Ghostscript up to 9.27. The affected element is the function .pdfexectoken. Executing a manipulation as part of PostScript File can lead to access control. This vulnerability is tracked as CVE-2019-14817. The attack is restricted to local execution. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical was found in Ghostscript up to 9.27 (Document Processing Software). This vulnerability affects the function .pdfexectoken. The manipulation as part of a PostScript File leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in, ghostscript versions prior to 9.28, in the .pdfexectoken and other procedures where it did not properly secure its privileged calls, enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could disable security protection and then have access to the file system, or execute arbitrary commands.

The weakness was disclosed 09/03/2019 as confirmed git commit (GIT Repository). The advisory is available at git.ghostscript.com. This vulnerability was named CVE-2019-14817 since 08/10/2019. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 240001 (TencentOS Server 3: ghostscript (TSSA-2022:0123)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.28 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.ghostscript.com. The best possible mitigation is suggested to be patching the affected component.

The vulnerability is also documented in the vulnerability database at Tenable (240001). The entry VDB-141201 is pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Document Processing Software

Name

• Ghostscript

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6
• 9.7
• 9.8
• 9.9
• 9.10
• 9.11
• 9.12
• 9.13
• 9.14
• 9.15
• 9.16
• 9.17
• 9.18
• 9.19
• 9.20
• 9.21
• 9.22
• 9.23
• 9.24
• 9.25
• 9.26
• 9.27

License

• free

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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