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AUSCERT External Security Bulletin Redistribution
SUSE-SU-2020:1353-1 Security update for freetype2
22 May 2020
AusCERT Security Bulletin Summary
Operating System: SUSE
Impact/Access: Denial of Service -- Remote with User Interaction
CVE Names: CVE-2018-6942
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SUSE Security Update: Security update for freetype2
Announcement ID: SUSE-SU-2020:1353-1
References: #1079603 #1091109
SUSE Linux Enterprise Module for Basesystem 15-SP1
An update that solves one vulnerability and has one errata is now available.
This update for freetype2 to version 2.10.1 fixes the following issues:
Security issue fixed:
o CVE-2018-6942: Fixed a NULL pointer dereference within ttinerp.c (bsc#
Non-security issues fixed:
o Update to version 2.10.1 * The bytecode hinting of OpenType variation fonts
was flawed, since the data in the `CVAR' table wasn't correctly applied. *
Auto-hinter support for Mongolian. * The handling of the default character
in PCF fonts as introduced in version 2.10.0 was partially broken, causing
premature abortion of charmap iteration for many fonts. * If
`FT_Set_Named_Instance' was called with the same arguments twice in a row,
the function returned an incorrect error code the second time. * Direct
rendering using FT_RASTER_FLAG_DIRECT crashed (bug introduced in version
2.10.0). * Increased precision while computing OpenType font variation
instances. * The flattening algorithm of cubic Bezier curves was slightly
changed to make it faster. This can cause very subtle rendering changes,
which aren't noticeable by the eye, however. * The auto-hinter now disables
hinting if there are blue zones defined for a `style' (i.e., a certain
combination of a script and its related typographic features) but the font
doesn't contain any characters needed to set up at least one blue zone.
o Add tarball signatures and freetype2.keyring
o Update to version 2.10.0 * A bunch of new functions has been added to
access and process COLR/CPAL data of OpenType fonts with color-layered
glyphs. * As a GSoC 2018 project, Nikhil Ramakrishnan completely overhauled
and modernized the API reference. * The logic for computing the global
ascender, descender, and height of OpenType fonts has been slightly
adjusted for consistency. * `TT_Set_MM_Blend' could fail if called
repeatedly with the same arguments. * The precision of handling deltas in
Variation Fonts has been increased.The problem did only show up with
multidimensional designspaces. * New function `FT_Library_SetLcdGeometry'
to set up the geometry of LCD subpixels. * FreeType now uses the
`defaultChar' property of PCF fonts to set the glyph for the undefined
character at glyph index 0 (as FreeType already does for all other
supported font formats). As a consequence, the order of glyphs of a PCF
font if accessed with FreeType can be different now compared to previous
versions. This change doesn't affect PCF font access with cmaps. *
`FT_Select_Charmap' has been changed to allow parameter value
`FT_ENCODING_NONE', which is valid for BDF, PCF, and Windows FNT formats to
access built-in cmaps that don't have a predefined `FT_Encoding' value. * A
previously reserved field in the `FT_GlyphSlotRec' structure now holds the
glyph index. * The usual round of fuzzer bug fixes to better reject
malformed fonts. * `FT_Outline_New_Internal' and `FT_Outline_Done_Internal'
have been removed.These two functions were public by oversight only and
were never documented. * A new function `FT_Error_String' returns
descriptions of error codes if configuration macro
FT_CONFIG_OPTION_ERROR_STRINGS is defined. * `FT_Set_MM_WeightVector' and
`FT_Get_MM_WeightVector' are new functions limited to Adobe MultiMaster
fonts to directly set and get the weight vector.
o Enable subpixel rendering with infinality config:
o Re-enable freetype-config, there is just too many fallouts.
o Update to version 2.9.1 * Type 1 fonts containing flex features were not
rendered correctly (bug introduced in version 2.9). * CVE-2018-6942: Older
FreeType versions can crash with certain malformed variation fonts. * Bug
fix: Multiple calls to `FT_Get_MM_Var' returned garbage. * Emboldening of
bitmaps didn't work correctly sometimes, showing various artifacts (bug
introduced in version 2.8.1). * The auto-hinter script ranges have been
updated for Unicode 11. No support for new scripts have been added,
however, with the exception of Georgian Mtavruli.
o freetype-config is now deprecated by upstream and not enabled by default.
o Update to version 2.10.1 * The `ftmulti' demo program now supports multiple
hidden axes with the same name tag. * `ftview', `ftstring', and `ftgrid'
got a `-k' command line option to emulate a sequence of keystrokes at
start-up. * `ftview', `ftstring', and `ftgrid' now support screen dumping
to a PNG file. * The bytecode debugger, `ttdebug', now supports variation
TrueType fonts; a variation font instance can be selected with the new `-d'
command line option.
o Add tarball signatures and freetype2.keyring
o Update to version 2.10.0 * The `ftdump' demo program has new options `-c'
and `-C' to display charmaps in compact and detailed format, respectively.
Option `-V' has been removed. * The `ftview', `ftstring', and `ftgrid' demo
programs use a new command line option `-d' to specify the program window's
width, height, and color depth. * The `ftview' demo program now displays
red boxes for zero-width glyphs. * `ftglyph' has limited support to display
fonts with color-layered glyphs.This will be improved later on. * `ftgrid'
can now display bitmap fonts also. * The `ttdebug' demo program has a new
option `-f' to select a member of a TrueType collection (TTC). * Other
various improvements to the demo programs.
o Remove "Supplements: fonts-config" to avoid accidentally pulling in Qt
dependencies on some non-Qt based desktops.(bsc#1091109) fonts-config is
fundamental but ft2demos seldom installs by end users. only fonts-config
maintainers/debuggers may use ft2demos along to debug some issues.
o Update to version 2.9.1 * No changelog upstream.
To install this SUSE Security Update use the SUSE recommended installation
methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
o SUSE Linux Enterprise Module for Basesystem 15-SP1:
zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-1353=1
o SUSE Linux Enterprise Module for Basesystem 15-SP1 (aarch64 ppc64le s390x
o SUSE Linux Enterprise Module for Basesystem 15-SP1 (x86_64):
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