SB2018110712 - Arch Linux update for ghostscript
Published: November 7, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Code Injection (CVE-ID: CVE-2018-17961)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation that allows sandbox bypass via error handler setup vectors. A remote attacker can pass a specially crafted PostScript file to the affected application, inject and execute arbitrary code on the target system.
Note: this vulnerability exists due to insufficient patch for previously fixed Code injection vulnerability (CVE-2018-17183).
2) Security restrictions bypass (CVE-ID: CVE-2018-18073)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.The weakness exists due to exposure of system operators in the saved execution stack in an error object. A remote attacker can bypass a sandbox protection mechanism to conduct further attacks.
3) Code injection (CVE-ID: CVE-2018-18284)
The vulnerability allows a remote attacker to bypass the sandbox protection mechanism on the target system.
The vulnerability exists due to the failure of the sandbox protection mechanism of the affected software when the 1Policy operator is used. A remote unauthenticated attacker can trick the victim into accessing a PostScript file that submits malicious input, bypass the sandbox protection mechanism and modify or replace error handlers used by the software, which the attacker could use to inject and execute arbitrary code on the system.
Remediation
Install update from vendor's website.