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Test ID:1.3.6.1.4.1.25623.1.0.852125
Category:SuSE Local Security Checks
Title:SuSE Update for libxkbcommon openSUSE-SU-2018:3802-1 (libxkbcommon)
Summary:The remote host is missing an update for the 'libxkbcommon'; package(s) announced via the openSUSE-SU-2018:3802_1 advisory.
Description:Summary:
The remote host is missing an update for the 'libxkbcommon'
package(s) announced via the openSUSE-SU-2018:3802_1 advisory.

Vulnerability Insight:
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 (b ...

Description truncated, please see the referenced URL(s) for more information.

Affected Software/OS:
libxkbcommon on openSUSE Leap 15.0.

Solution:
Please install the updated package(s).

CVSS Score:
4.6

CVSS Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-15853
Common Vulnerability Exposure (CVE) ID: CVE-2018-15854
Common Vulnerability Exposure (CVE) ID: CVE-2018-15855
Common Vulnerability Exposure (CVE) ID: CVE-2018-15856
Common Vulnerability Exposure (CVE) ID: CVE-2018-15857
Common Vulnerability Exposure (CVE) ID: CVE-2018-15858
Common Vulnerability Exposure (CVE) ID: CVE-2018-15859
Common Vulnerability Exposure (CVE) ID: CVE-2018-15861
Common Vulnerability Exposure (CVE) ID: CVE-2018-15862
Common Vulnerability Exposure (CVE) ID: CVE-2018-15863
Common Vulnerability Exposure (CVE) ID: CVE-2018-15864
CopyrightCopyright (C) 2018 Greenbone Networks GmbH

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