Bug 1870162 (CVE-2020-16307) - CVE-2020-16307 ghostscript: NULL pointer dereference in devices/vector/gdevtxtw.c and psi/zbfont.c could result in a DoS
Summary: CVE-2020-16307 ghostscript: NULL pointer dereference in devices/vector/gdevtx...
Alias: CVE-2020-16307
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1870163 1870851 1870852
Blocks: 1870273
TreeView+ depends on / blocked
Reported: 2020-08-19 13:13 UTC by Michael Kaplan
Modified: 2021-05-18 20:34 UTC (History)
7 users (show)

Fixed In Version: ghostscript 9.51
Doc Type: If docs needed, set a value
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Clone Of:
Last Closed: 2021-05-18 20:34:56 UTC

Attachments (Terms of Use)

Description Michael Kaplan 2020-08-19 13:13:23 UTC
A null pointer dereference vulnerability in devices/vector/gdevtxtw.c and psi/zbfont.c of Artifex Software GhostScript v9.50 allows a remote attacker to cause a denial of service via a crafted postscript file. This is fixed in v9.51.



Comment 1 Michael Kaplan 2020-08-19 13:14:06 UTC
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1870163]

Comment 4 Todd Cullum 2020-08-21 15:06:56 UTC
Flaw summary:

A segmentation fault occurs when get_unicode() in /devices/vector/gdevtxtw.c and gs_font_map_glyph_to_unicode() in /psi/zbfont.c are called with the GS_NO_GLYPH glyph value. These functions are used for handling Unicode glyphs. The patch adds checks to the above routines to avoid processing the invalid GS_NO_GLYPH value.

Comment 5 Todd Cullum 2020-08-21 15:09:06 UTC

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Comment 6 errata-xmlrpc 2021-05-18 15:36:37 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1852 https://access.redhat.com/errata/RHSA-2021:1852

Comment 7 Product Security DevOps Team 2021-05-18 20:34:56 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


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