SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2018:2380-1) (Foreshadow)

Medium Nessus Plugin ID 120082

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. The following security bugs were fixed :

- CVE-2018-3620: Local attackers on baremetal systems could use speculative code patterns on hyperthreaded processors to read data present in the L1 Datacache used by other hyperthreads on the same CPU core, potentially leaking sensitive data. (bnc#1087081).

- CVE-2018-3646: Local attackers in virtualized guest systems could use speculative code patterns on hyperthreaded processors to read data present in the L1 Datacache used by other hyperthreads on the same CPU core, potentially leaking sensitive data, even from other virtual machines or the host system.
(bnc#1089343).

- CVE-2018-5391 aka 'FragmentSmack': A flaw in the IP packet reassembly could be used by remote attackers to consume lots of CPU time (bnc#1103097).

- CVE-2018-10876: A flaw was found in the ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image. (bnc#1099811)

- CVE-2018-10877: The ext4 filesystem is vulnerable to an out-of-bound access in the ext4_ext_drop_refs() function when operating on a crafted ext4 filesystem image.
(bnc#1099846)

- CVE-2018-10878: A flaw was found in the ext4 filesystem.
A local user can cause an out-of-bounds write and a denial of service or unspecified other impact is possible by mounting and operating a crafted ext4 filesystem image. (bnc#1099813)

- CVE-2018-10879: A flaw was found in the ext4 filesystem.
A local user can cause a use-after-free in ext4_xattr_set_entry function and a denial of service or unspecified other impact may occur by renaming a file in a crafted ext4 filesystem image. (bnc#1099844)

- CVE-2018-10880: Linux kernel is vulnerable to a stack-out-of-bounds write in the ext4 filesystem code when mounting and writing to a crafted ext4 image in ext4_update_inline_data(). An attacker could use this to cause a system crash and a denial of service.
(bnc#1099845)

- CVE-2018-10881: A flaw was found in the ext4 filesystem.
A local user can cause an out-of-bound access in ext4_get_group_info function, a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image. (bnc#1099864)

- CVE-2018-10882: A flaw was found in the ext4 filesystem.
A local user can cause an out-of-bound write in in fs/jbd2/transaction.c code, a denial of service, and a system crash by unmounting a crafted ext4 filesystem image. (bnc#1099849)

- CVE-2018-10883: A flaw was found in the ext4 filesystem.
A local user can cause an out-of-bounds write in jbd2_journal_dirty_metadata(), a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image. (bnc#1099863)

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

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 Workstation Extension 15:zypper in -t patch SUSE-SLE-Product-WE-15-2018-1614=1

SUSE Linux Enterprise Module for Legacy Software 15:zypper in -t patch SUSE-SLE-Module-Legacy-15-2018-1614=1

SUSE Linux Enterprise Module for Development Tools 15:zypper in -t patch SUSE-SLE-Module-Development-Tools-15-2018-1614=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-1614=1

SUSE Linux Enterprise High Availability 15:zypper in -t patch SUSE-SLE-Product-HA-15-2018-1614=1

CPE: p-cpe:/a:novell:suse_linux:kernel-default, p-cpe:/a:novell:suse_linux:kernel-default-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debugsource, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-default-devel-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-man, p-cpe:/a:novell:suse_linux:kernel-obs-build, p-cpe:/a:novell:suse_linux:kernel-obs-build-debugsource, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kernel-vanilla-base, p-cpe:/a:novell:suse_linux:kernel-vanilla-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-vanilla-debuginfo, p-cpe:/a:novell:suse_linux:kernel-vanilla-debugsource, p-cpe:/a:novell:suse_linux:kernel-zfcpdump, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debuginfo, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debugsource, p-cpe:/a:novell:suse_linux:lttng-modules, p-cpe:/a:novell:suse_linux:lttng-modules-debugsource, p-cpe:/a:novell:suse_linux:lttng-modules-kmp-default, p-cpe:/a:novell:suse_linux:lttng-modules-kmp-default-debuginfo, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default-debuginfo, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 2018/08/16

Vulnerability Publication Date: 2018/07/18

Reference Information

CVE: CVE-2018-10876, CVE-2018-10877, CVE-2018-10878, CVE-2018-10879, CVE-2018-10880, CVE-2018-10881, CVE-2018-10882, CVE-2018-10883, CVE-2018-3620, CVE-2018-3646, CVE-2018-5391

SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2018:2380-1) (Foreshadow)

Medium Nessus Plugin ID 120082

Synopsis

Description

Solution

See Also

Plugin Details

Risk Information

CVSS v2.0

CVSS v3.0

Vulnerability Information

Reference Information