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AUSCERT External Security Bulletin Redistribution
ESB-2018.3519
SUSE Security Update: Security update for libxkbcommon
9 November 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: libxkbcommon
Publisher: SUSE
Operating System: SUSE
Impact/Access: Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-15864 CVE-2018-15863 CVE-2018-15862
CVE-2018-15861 CVE-2018-15859 CVE-2018-15858
CVE-2018-15857 CVE-2018-15856 CVE-2018-15855
CVE-2018-15854 CVE-2018-15853
Reference: ESB-2018.3046.2
Original Bulletin:
https://www.suse.com/support/update/announcement/2018/suse-su-20183685-1/
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SUSE Security Update: Security update for libxkbcommon
______________________________________________________________________________
Announcement ID: SUSE-SU-2018:3685-1
Rating: low
References: #1105832
Cross-References: CVE-2018-15853 CVE-2018-15854 CVE-2018-15855
CVE-2018-15856 CVE-2018-15857 CVE-2018-15858
CVE-2018-15859 CVE-2018-15861 CVE-2018-15862
CVE-2018-15863 CVE-2018-15864
Affected Products:
SUSE Linux Enterprise Module for Basesystem 15
______________________________________________________________________________
An update that fixes 11 vulnerabilities is now available.
Description:
This update for libxkbcommon to version 0.8.2 fixes the following issues:
- Fix a few NULL-dereferences, out-of-bounds access and undefined behavior
in the XKB text format parser.
- CVE-2018-15853: Endless recursion could have been used by local
attackers to crash xkbcommon users by supplying a crafted keymap file
that triggers boolean negation (bsc#1105832).
- CVE-2018-15854: Unchecked NULL pointer usage could have been used by
local attackers to crash (NULL pointer dereference) the xkbcommon parser
by supplying a crafted keymap file, because geometry tokens were
desupported incorrectly (bsc#1105832).
- CVE-2018-15855: Unchecked NULL pointer usage could have been used by
local attackers to crash (NULL pointer dereference) the xkbcommon parser
by supplying a crafted keymap file, because the XkbFile for an
xkb_geometry section was mishandled (bsc#1105832).
- CVE-2018-15856: An infinite loop when reaching EOL unexpectedly could be
used by local attackers to cause a denial of service during parsing of
crafted keymap files (bsc#1105832).
- CVE-2018-15857: An invalid free in ExprAppendMultiKeysymList could have
been used by local attackers to crash xkbcommon keymap parsers or
possibly have unspecified other impact by supplying a crafted keymap
file (bsc#1105832).
- CVE-2018-15858: Unchecked NULL pointer usage when handling invalid
aliases in CopyKeyAliasesToKeymap could have been used by local
attackers to crash (NULL pointer dereference) the xkbcommon parser by
supplying a crafted keymap file (bsc#1105832).
- CVE-2018-15859: Unchecked NULL pointer usage when parsing invalid atoms
in ExprResolveLhs could have been used by local attackers to crash (NULL
pointer dereference) the xkbcommon parser by supplying a crafted keymap
file, because lookup failures are mishandled (bsc#1105832).
- CVE-2018-15861: Unchecked NULL pointer usage in ExprResolveLhs could
have been used by local attackers to crash (NULL pointer dereference)
the xkbcommon parser by supplying a crafted keymap file that triggers an
xkb_intern_atom failure (bsc#1105832).
- CVE-2018-15862: Unchecked NULL pointer usage in LookupModMask could have
been used by local attackers to crash (NULL pointer dereference) the
xkbcommon parser by supplying a crafted keymap file with invalid virtual
modifiers (bsc#1105832).
- CVE-2018-15863: Unchecked NULL pointer usage in ResolveStateAndPredicate
could have been used by local attackers to crash (NULL pointer
dereference) the xkbcommon parser by supplying a crafted keymap file
with a no-op modmask expression (bsc#1105832).
- CVE-2018-15864: Unchecked NULL pointer usage in resolve_keysym could
have been used by local attackers to crash (NULL pointer dereference)
the xkbcommon parser by supplying a crafted keymap file, because a map
access attempt can
occur for a map that was never created (bsc#1105832).
Patch Instructions:
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:
- SUSE Linux Enterprise Module for Basesystem 15:
zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-2620=1
Package List:
- SUSE Linux Enterprise Module for Basesystem 15 (aarch64 ppc64le s390x x86_64):
libxkbcommon-debugsource-0.8.2-3.3.1
libxkbcommon-devel-0.8.2-3.3.1
libxkbcommon-x11-0-0.8.2-3.3.1
libxkbcommon-x11-0-debuginfo-0.8.2-3.3.1
libxkbcommon-x11-devel-0.8.2-3.3.1
libxkbcommon0-0.8.2-3.3.1
libxkbcommon0-debuginfo-0.8.2-3.3.1
References:
https://www.suse.com/security/cve/CVE-2018-15853.html
https://www.suse.com/security/cve/CVE-2018-15854.html
https://www.suse.com/security/cve/CVE-2018-15855.html
https://www.suse.com/security/cve/CVE-2018-15856.html
https://www.suse.com/security/cve/CVE-2018-15857.html
https://www.suse.com/security/cve/CVE-2018-15858.html
https://www.suse.com/security/cve/CVE-2018-15859.html
https://www.suse.com/security/cve/CVE-2018-15861.html
https://www.suse.com/security/cve/CVE-2018-15862.html
https://www.suse.com/security/cve/CVE-2018-15863.html
https://www.suse.com/security/cve/CVE-2018-15864.html
https://bugzilla.suse.com/1105832
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