What’s Vulnerable › Vulnerabilities

CVE-2018-18284

• Severity: high (CVSS 8.6 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 16.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-19 · updated 2026-06-17

Description

Artifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors involving the 1Policy operator.

Affected products

• Artifex Ghostscript: through 9.25
• Artifex Gpl Ghostscript: before 9.26 — fixed in 9.26
• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• Debian Linux: 8.0, 9.0
• Ivanti Connect Secure (Pulse Secure): from 8.2r1.0 before 8.2r12.1; from 8.3r1 before 8.3r7.1; from 9.0r1 before 9.0r3.4 — fixed in 8.2r12.1, 8.3r7.1, 9.0r3.4
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: Artifex Gpl Ghostscript 9.26; Ivanti Connect Secure (Pulse Secure) 8.2r12.1, 8.3r7.1, 9.0r3.4. Check the vendor advisory for mitigations.

References

• http://git.ghostscript.com/?p=ghostpdl.git%3Bh=8d19fdf63f91f50466b08f23e2d93d37a4c5ea0b
• http://www.openwall.com/lists/oss-security/2018/10/16/2
• http://www.securityfocus.com/bid/107451
• https://access.redhat.com/errata/RHSA-2018:3834
• https://bugs.chromium.org/p/project-zero/issues/detail?id=1696
• https://bugs.ghostscript.com/show_bug.cgi?id=699963
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101
• https://lists.debian.org/debian-lts-announce/2018/10/msg00013.html
• https://security.gentoo.org/glsa/201811-12
• https://support.f5.com/csp/article/K22141757?utm_source=f5support&amp%3Butm_medium=RSS
• https://usn.ubuntu.com/3803-1/
• https://www.debian.org/security/2018/dsa-4336

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