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RedHat: RHSA-2018-3834-01 Important Update for Ghostscript Security Issues

red hat
Calendar Grey December 17, 2018
Dist Redhat Esm H88
The recent Ghostscript patch addresses severe security flaws for Red Hat Enterprise Linux 7, improving overall system integrity.
An update for ghostscript is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The Ghostscript suite contains utilities for rendering PostScript and PDF documents. Ghostscript translates PostScript code to common bitmap formats so that the code can be displayed or printed.
Security Fix(es):
* ghostscript: Incorrect free logic in pagedevice replacement (699664) (CVE-2018-16541)
* ghostscript: Incorrect "restoration of privilege" checking when running out of stack during exception handling (CVE-2018-16802)
* ghostscript: User-writable error exception table (CVE-2018-17183)
* ghostscript: Saved execution stacks can leak operator arrays (incomplete fix for CVE-2018-17183) (CVE-2018-17961)
* ghostscript: Saved execution stacks can leak operator arrays (CVE-2018-18073)
* ghostscript: 1Policy operator allows a sandbox protection bypass (CVE-2018-18284)
* ghostscript: Type confusion in setpattern (700141) (CVE-2018-19134)
* ghostscript: Improperly implemented security check in zsetdevice function in psi/zdevice.c (CVE-2018-19409)
* ghostscript: Uninitialized memory access in the aesdecode operator (699665) (CVE-2018-15911)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank Tavis Ormandy (Google Project Zero) for reporting CVE-2018-16541.
Bug Fix(es):
* It has been found that ghostscript-9.07-31.el7_6.1 introduced regression during the handling of shading objects, causing a "Dropping incorrect smooth shading object" warning. With this update, the regression has been fixed and the described problem no longer occurs. (BZ#1657822)

Topics%20covered

Topics Covered

security advisory security issue red hat bug fix ghostscript server important

References

https://access.redhat.com/security/cve/CVE-2018-15911 https://access.redhat.com/security/cve/CVE-2018-16541 https://access.redhat.com/security/cve/CVE-2018-16802 https://access.redhat.com/security/cve/CVE-2018-17183 https://access.redhat.com/security/cve/CVE-2018-17961 https://access.redhat.com/security/cve/CVE-2018-18073 https://access.redhat.com/security/cve/CVE-2018-18284 https://access.redhat.com/security/cve/CVE-2018-19134 https://access.redhat.com/security/cve/CVE-2018-19409 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: ghostscript-9.07-31.el7_6.6.src.rpm
x86_64: ghostscript-9.07-31.el7_6.6.i686.rpm ghostscript-9.07-31.el7_6.6.x86_64.rpm ghostscript-cups-9.07-31.el7_6.6.x86_64.rpm ghostscript-debuginfo-9.07-31.el7_6.6.i686.rpm ghostscript-debuginfo-9.07-31.el7_6.6.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: ghostscript-doc-9.07-31.el7_6.6.noarch.rpm
x86_64: ghostscript-debuginfo-9.07-31.el7_6.6.i686.rpm ghostscript-debuginfo-9.07-31.el7_6.6.x86_64.rpm ghostscript-devel-9.07-31.el7_6.6.i686.rpm ghostscript-devel-9.07-31.el7_6.6.x86_64.rpm ghostscript-gtk-9.07-31.el7_6.6.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: ghostscript-9.07-31.el7_6.6.src.rpm
x86_64: ghostscript-9.07-31.el7_6.6.i686.rpm ghostscript-9.07-31.el7_6.6.x86_64.rpm ghostscript-cups-9.07-31.el7_6.6.x86_64.rpm ghostscript-debuginfo-9.07-31.el7_6.6.i686.rpm ghostscript-debuginfo-9.07-31.el7_6.6.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch: ghostscript-doc-9.07-31.el7_6.6.noarch.rpm
x86_64: ghostscript-debuginfo-9.07-31.el7_6.6.i686.rpm ghostscript-debuginfo-9.07-31.el7_6.6.x86_64.rpm ghostscript-devel-9.07-31.el7_6.6.i686.rpm ghostscript-devel-9.07-31.el7_6.6.x86_64.rpm ghostscript-gtk-9.07-31.el7_6.6.x86_64.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:3834-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:3834
Issue date: 2018-12-17

Topic

An update for ghostscript is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue red hat bug fix ghostscript server important

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le, s390x

Bugs Fixed

1625832 - CVE-2018-15911 ghostscript: Uninitialized memory access in the aesdecode operator (699665)

1625846 - CVE-2018-16541 ghostscript: Incorrect free logic in pagedevice replacement (699664)

1627959 - CVE-2018-16802 ghostscript: Incorrect "restoration of privilege" checking when running out of stack during exception handling

1632471 - CVE-2018-17183 ghostscript: User-writable error exception table

1642578 - CVE-2018-17961 ghostscript: Saved execution stacks can leak operator arrays (incomplete fix for CVE-2018-17183)

1642584 - CVE-2018-18073 ghostscript: Saved execution stacks can leak operator arrays

1642940 - CVE-2018-18284 ghostscript: 1Policy operator allows a sandbox protection bypass

1652583 - CVE-2018-19409 ghostscript: Improperly implemented security check in zsetdevice function in psi/zdevice.c

1655599 - CVE-2018-19134 ghostscript: Type confusion in setpattern (700141)

1657822 - ghostscript: Regression: Warning: Dropping incorrect smooth shading object (Error: /rangecheck in --run--) [rhel-7.6.z]

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