SB2018112706 - Multiple vulnerabilities in Artifex Ghostscript

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Main Vulnerability Database SB2018112706

SB2018112706 - Multiple vulnerabilities in Artifex Ghostscript

Published: November 27, 2018 Updated: January 4, 2019

Security Bulletin ID SB2018112706
Severity
Low
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Security restrictions bypass (CVE-ID: CVE-2018-19475)

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to the psi/zdevice2.c source code file fails to check available stack space. A remote unauthenticated attacker can trick the victim into accessing a PostScript file that submits malicious input to bypass the security access restrictions on the targeted system, which could be used to conduct further attacks.


2) Type confusion (CVE-ID: CVE-2018-19477)

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to a JBIG2Decode type confusion condition in the psi/zfjbig2.csource code file. A remote unauthenticated attacker can trick the victim into accessing a PostScript file that submits malicious input to bypass the security access restrictions on the targeted system, which could be used to conduct further attacks.


3) Type confusion (CVE-ID: CVE-2018-19476)

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to a setcolorspace type confusion condition in the psi/zicc.c source code file. A remote unauthenticated attacker can trick the victim into accessing a PostScript file that submits malicious input to bypass the security access restrictions on the targeted system, which could be used to conduct further attacks.


4) Security restrictions bypass (CVE-ID: CVE-2018-19409)

The vulnerability allows a local attacker to bypass security restrictions on the target system.

The vulnerability exists due to improper checks of the LockSafetyParams device parameter if another device is used as the top device. A local attacker can make a .setdevice call and bypass security restrictions If another device, such as the pdf14 compositor, is the top device on the system.


5) Input validation error (CVE-ID: CVE-2018-19478)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can trick the victim into processing a specially crafted PDF file and trigger an extremely long running computation.


Remediation

Install update from vendor's website.

References