CVE-2016-8602

ghostscript: check for sufficient params in .sethalftone5

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The .sethalftone5 function in psi/zht2.c in Ghostscript before 9.21 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted Postscript document that calls .sethalftone5 with an empty operand stack.

La función .sethalftone5 en psi/zht2.c en Ghostscript en versiones anteriores a 9.21 permite a los atacantes remotos provocar una denegación de servicio (caída de la aplicación) o posiblemente ejecutar código arbitrario a través de un documento Postscript que llama a .sethalftone5 con una pila de operandos vacía.

It was found that ghostscript did not sufficiently check the validity of parameters given to the .sethalftone5 function. A specially crafted postscript document could cause a crash, or execute arbitrary code in the context of the gs process.

The Ghostscript suite contains utilities for rendering PostScript and PDF documents. Ghostscript translates PostScript code to common bitmap formats so that the code can be displayed or printed. Security Fix: It was found that the ghostscript functions getenv, filenameforall and .libfile did not honor the -dSAFER option, usually used when processing untrusted documents, leading to information disclosure. A specially crafted postscript document could read environment variable, list directory and retrieve file content respectively, from the target.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-10-11 CVE Reserved
2016-12-02 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-704: Incorrect Type Conversion or Cast

CAPEC

References (12)

URL	Tag	Source
http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commitdiff%3Bh=f5c7555c303	X_refsource_confirm
http://www.securityfocus.com/bid/95311	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2016/10/11/5	2023-11-07
http://www.openwall.com/lists/oss-security/2016/10/11/7	2023-11-07
https://bugs.ghostscript.com/show_bug.cgi?id=697203	2023-11-07
https://bugzilla.redhat.com/show_bug.cgi?id=1383940	2017-01-04
https://ghostscript.com/doc/9.21/History9.htm	2023-11-07

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2017-0013.html	2023-11-07
http://rhn.redhat.com/errata/RHSA-2017-0014.html	2023-11-07
http://www.debian.org/security/2016/dsa-3691	2023-11-07
https://security.gentoo.org/glsa/201702-31	2023-11-07
https://access.redhat.com/security/cve/CVE-2016-8602	2017-01-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Artifex Search vendor "Artifex"		Ghostscript Search vendor "Artifex" for product "Ghostscript"				<= 9.20 Search vendor "Artifex" for product "Ghostscript" and version " <= 9.20"		-		Affected