CVE-2016-7979

ghostscript: Type confusion in .initialize_dsc_parser allows remote code execution

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Ghostscript versiones anteriores a 9.21 podría permitir que los atacantes remotos pasaran por alto el mecanismo de protección del modo SAFER y, en consecuencia, ejecutar código arbitrario mediante el aprovechamiento de la confusión de tipos en .initialize_dsc_parser.

It was found that the ghostscript function .initialize_dsc_parser did not validate its parameter before using it, allowing a type confusion flaw. A specially crafted postscript document could cause a crash code execution in the context of the gs process.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

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

Low

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

2016-09-09 CVE Reserved
2016-12-02 CVE Published
2023-07-18 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (10)

URL	Tag	Source
http://git.ghostscript.com/?p=ghostpdl.git%3Bh=875a0095f37626a721c7ff57d606a0f95af03913	X_refsource_confirm
http://www.securityfocus.com/bid/95337	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2016/10/05/15	2023-11-07
https://bugs.ghostscript.com/show_bug.cgi?id=697190	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-2016-7979	2017-01-04
https://bugzilla.redhat.com/show_bug.cgi?id=1382305	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