high
7.8
Advisory Published
Updated

CVE-2018-16802

First published: Mon Sep 10 2018(Updated: )

An issue was discovered in Artifex Ghostscript before 9.25. Incorrect "restoration of privilege" checking when running out of stack during exception handling could be used by attackers able to supply crafted PostScript to execute code using the "pipe" instruction. This is due to an incomplete fix for <a href="https://access.redhat.com/security/cve/CVE-2018-16509">CVE-2018-16509</a>. References: <a href="https://seclists.org/oss-sec/2018/q3/228">https://seclists.org/oss-sec/2018/q3/228</a> <a href="https://seclists.org/oss-sec/2018/q3/229">https://seclists.org/oss-sec/2018/q3/229</a> <a href="https://seclists.org/oss-sec/2018/q3/233">https://seclists.org/oss-sec/2018/q3/233</a> Upstream Patches: <a href="https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=643b24db">https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=643b24db</a> <a href="https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=3e5d316b">https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=3e5d316b</a> <a href="https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=5812b1b7">https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=5812b1b7</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/ghostscript<9.25
9.25
debian/ghostscript
9.53.3~dfsg-7+deb11u7
9.53.3~dfsg-7+deb11u9
10.0.0~dfsg-11+deb12u6
10.04.0~dfsg-2
Ghostscript<9.25
Debian=8.0
Debian=9.0
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Red Hat Enterprise Linux Desktop=7.0
Red Hat Enterprise Linux Server=7.0
Red Hat Enterprise Linux Server=7.6
Red Hat Enterprise Linux Server=7.6
Red Hat Enterprise Linux Server=7.6
Red Hat Enterprise Linux Workstation=7.0

Remedy

https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=5812b1b78fc4d36fdc293b7859de69241140d590

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2018-16802?

    The severity of CVE-2018-16802 is high with a CVSS score of 7.8.

  • How can attackers exploit CVE-2018-16802?

    Attackers can exploit CVE-2018-16802 by supplying crafted PostScript to execute code using the "pipe" instruction.

  • Which software versions are affected by CVE-2018-16802?

    The affected software versions include Artifex Ghostscript before 9.25, and certain versions of Ubuntu, Debian, Canonical Ubuntu Linux, and Red Hat Enterprise Linux Server.

  • What is the remedy for CVE-2018-16802?

    The remedy for CVE-2018-16802 is to update to Ghostscript version 9.25 or later.

  • Where can I find more information about CVE-2018-16802?

    You can find more information about CVE-2018-16802 at the following references: [Reference 1](https://seclists.org/oss-sec/2018/q3/228), [Reference 2](http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=3e5d316b72e3965b7968bb1d96baa137cd063ac6), [Reference 3](http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=643b24dbd002fb9c131313253c307cf3951b3d47).

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