SB2018090708 - Multiple vulnerabilities in Artifex Ghostscript

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Main Vulnerability Database SB2018090708

SB2018090708 - Multiple vulnerabilities in Artifex Ghostscript

Published: September 7, 2018

Security Bulletin ID SB2018090708
Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Improper input validation (CVE-ID: CVE-2018-16510)

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to incorrect exec stack handling in the CS and SC PDF operators. A remote unauthenticated attacker can trick the victim into opening a specially crafted PDF file that submits malicious input and cause the affected software to crash or execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) Type confusion (CVE-ID: CVE-2018-16511)

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to a type confusion condition in the ztype code. A remote unauthenticated attacker can trick the victim into opening a specially crafted PostScript file that submits malicious input and cause the affected software to crash or execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


3) Type confusion (CVE-ID: CVE-2018-16513)

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to a type confusion condition in the setcolor function. A remote unauthenticated attacker can trick the victim into opening a specially crafted PostScript file that submits malicious input and cause the affected software to crash or execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


4) OS command injection (CVE-ID: CVE-2018-16509)

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to /invalidaccess checks can be bypassed after a restore failure. A remote unauthenticated attacker can trick the victim into opening a specially crafted PostScript file that submits malicious input and execute arbitrary shell commands.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: original fix for this vulnerability was incomplete in version 9.24. Vendor has issued another patch.


Remediation

Install update from vendor's website.

References