Ghostscript vulnerabilities

The PS Interpreter in Ghostscript versions 9.18 and 9.20 allows remote attackers to execute arbitrary code via crafted userparams.

The .sethalftone5 function in Ghostscript before version 9.21 allows remote attackers to cause application crashes or potentially execute arbitrary code via a crafted Postscript document that calls .sethalftone5 with an empty operand stack.

The fill_threshhold_buffer function in base/gxht_thresh.c in Ghostscript 9.20 by Artifex Software, Inc. allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted PostScript document.

Multiple use-after-free vulnerabilities in the gx_image_enum_begin function in base/gxipixel.c in Ghostscript before ecceafe3abba2714ef9b432035fe0739d9b1a283 allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted PostScript document.

Ghostscript before 9.21 might allow remote attackers to bypass the SAFER mode protection mechanism and consequently execute arbitrary code by leveraging type confusion in .initialize_dsc_parser.

A use-after-free vulnerability in Ghostscript 9.20 may allow remote attackers to execute arbitrary code via reference leaks in the .setdevice function.

A flaw was found in ghostscript for Red Hat Enterprise Linux 8, where the fix for CVE-2020-16305 was not included as previously claimed. This issue affects the ghostscript package specifically.

An integer overflow flaw was found in pl_glyph_name in Ghostscript, which may allow a local attacker to cause a denial of service by transforming a crafted PCL file to PDF format.

A buffer overflow flaw was found in the devn_pcx_write_rle() function in Ghostscript, which may allow a local attacker to cause a denial of service by outputting a crafted PDF file for a DEVN device.

Artifex Ghostscript before 10.01.2 mishandles permission validation for pipe devices (with the %pipe% prefix or the | pipe character prefix).

The ghostscript command with the -dSAFER option allows remote attackers to execute commands.