Incorrect Use of Privileged APIs Affecting ghostscript-x11 package, versions <0:9.25-2.el8_0.2


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.1% (44th percentile)

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  • Snyk ID SNYK-RHEL8-GHOSTSCRIPTX11-3465034
  • published 26 Jul 2021
  • disclosed 12 Aug 2019

How to fix?

Upgrade RHEL:8 ghostscript-x11 to version 0:9.25-2.el8_0.2 or higher.
This issue was patched in RHSA-2019:2465.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ghostscript-x11 package and not the ghostscript-x11 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

In ghostscript before version 9.50, the .buildfont1 procedure did not properly secure its privileged calls, enabling scripts to bypass -dSAFER restrictions. An attacker could abuse this flaw by creating a specially crafted PostScript file that could escalate privileges and access files outside of restricted areas.

CVSS Scores

version 3.1
Expand this section

NVD

7.8 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High