SB2018083002 - Multiple vulnerabilities in Artifex Ghostscript
Published: August 30, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2018-15911)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the bypass of the -dSAFER option. A remote unauthenticated attacker can submit a specially crafted PostScript file, cause uninitialized memory access in the aesdecode operator and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
2) Type confusion (CVE-ID: CVE-2018-15910)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the bypass of the -dSAFER option. A remote unauthenticated attacker can submit a specially crafted PostScript file, trigger type confusion in LockDistillerParams parameter and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
3) Improper input validation (CVE-ID: CVE-2018-15908)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists due to the bypass of the -dSAFER option. A remote unauthenticated attacker can submit a specially crafted PostScript file, bypass .tempfile restrictions and write files on the targeted system.
Remediation
Install update from vendor's website.