RHSA-2019:0229 - Security Advisory

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 impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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: use-after-free in copydevice handling (699661) (CVE-2018-16540)
• ghostscript: access bypass in psi/zdevice2.c (700153) (CVE-2018-19475)
• ghostscript: access bypass in psi/zicc.c (700169) (CVE-2018-19476)
• ghostscript: access bypass in psi/zfjbig2.c (700168) (CVE-2018-19477)
• ghostscript: subroutines within pseudo-operators must themselves be pseudo-operators (700317) (CVE-2019-6116)

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-2019-6116.

Bug Fix(es):

• Previously, ghostscript-9.07-31.el7_6.1 introduced a regression during the standard input reading, causing a "/invalidfileaccess in --run--" error. With this update, the regression has been fixed and the described error no longer occurs. (BZ#1665919)

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

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.6 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux for ARM 64 7 aarch64
• Red Hat Enterprise Linux for Power 9 7 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux for IBM System z (Structure A) 7 s390x

Fixes

• BZ - 1625843 - CVE-2018-16540 ghostscript: use-after-free in copydevice handling (699661)
• BZ - 1654459 - CVE-2018-19475 ghostscript: access bypass in psi/zdevice2.c (700153)
• BZ - 1654464 - CVE-2018-19476 ghostscript: access bypass in psi/zicc.c (700169)
• BZ - 1654468 - CVE-2018-19477 ghostscript: access bypass in psi/zfjbig2.c (700168)
• BZ - 1665919 - ghostscript: Regression: pdf2ps reports an error when reading from stdin (Error: /invalidfileaccess in --run--) [rhel-7.6.z]
• BZ - 1666636 - CVE-2019-6116 ghostscript: subroutines within pseudo-operators must themselves be pseudo-operators (700317)

CVEs

• CVE-2018-16540
• CVE-2018-19475
• CVE-2018-19476
• CVE-2018-19477
• CVE-2019-6116

References

• https://access.redhat.com/security/updates/classification/#important