Bug 1968638 (CVE-2020-16600) - CVE-2020-16600 mupdf: use-after-free when a valid page was followed by a page with invalid pixmap dimensions
Summary: CVE-2020-16600 mupdf: use-after-free when a valid page was followed by a page...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-16600
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-06-07 17:42 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-28 05:29 UTC (History)
1 user (show)

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Last Closed: 2021-10-28 05:29:50 UTC
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Description Guilherme de Almeida Suckevicz 2021-06-07 17:42:49 UTC 
A Use After Free vulnerability exists in Artifex Software, Inc. MuPDF library 1.17.0-rc1 and earlier when a valid page was followed by a page with invalid pixmap dimensions, causing bander - a static - to point to previously freed memory instead of a newband_writer.

Reference:
https://bugs.ghostscript.com/show_bug.cgi?id=702253

Upstream patch:
http://git.ghostscript.com/?p=mupdf.git;h=96751b25462f83d6e16a9afaf8980b0c3f979c8b
Comment 1 Michael J Gruber 2021-06-07 19:46:51 UTC 
I have no clue which OS or release this bug is for, but Fedora 32 and up have mupdf 1.18.0, Fedora 31 has mupdf 1.17.0 (all of which contain the fix); only Fedora 30 and below are affected (but EOLed since long).
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