openSUSE Security Update : the Linux Kernel (openSUSE-2018-656) (Spectre)

high Nessus Plugin ID 110658

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Synopsis

The remote openSUSE host is missing a security update.

Description

The openSUSE Leap 42.3 was updated to 4.4.138 to receive various security and bugfixes.

The following security bugs were fixed :

- CVE-2018-3639: Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4 (bsc#1085308 bsc#1087082) This update improves the previous Spectre Variant 4 fixes and also mitigates them on the ARM architecture.

- CVE-2018-3665: The FPU state and registers of x86 CPUs were saved and restored in a lazy fashion, which opened its disclosure by speculative side channel attacks. This has been fixed by replacing the lazy save/restore by eager saving and restoring (bnc#1087086)

- CVE-2018-5848: In the function wmi_set_ie(), the length validation code did not handle unsigned integer overflow properly. As a result, a large value of the 'ie_len' argument can cause a buffer overflow (bnc#1097356).

- CVE-2017-18249: The add_free_nid function in fs/f2fs/node.c did not properly track an allocated nid, which allowed local users to cause a denial of service (race condition) or possibly have unspecified other impact via concurrent threads (bnc#1087036).

- CVE-2017-18241: fs/f2fs/segment.c kernel allowed local users to cause a denial of service (NULL pointer dereference and panic) by using a noflush_merge option that triggers a NULL value for a flush_cmd_control data structure (bnc#1086400).

- CVE-2017-17741: The KVM implementation allowed attackers to obtain potentially sensitive information from kernel memory, aka a write_mmio stack-based out-of-bounds read, related to arch/x86/kvm/x86.c and include/trace/events/kvm.h (bnc#1073311 1091815).

- CVE-2017-13305: A information disclosure vulnerability in the encrypted-keys. (bnc#1094353).

- CVE-2018-1093: The ext4_valid_block_bitmap function in fs/ext4/balloc.c allowed attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers (bnc#1087095).

- CVE-2018-1094: The ext4_fill_super function in fs/ext4/super.c did not always initialize the crc32c checksum driver, which allowed attackers to cause a denial of service (ext4_xattr_inode_hash NULL pointer dereference and system crash) via a crafted ext4 image (bnc#1087007 1092903).

- CVE-2018-1092: The ext4_iget function in fs/ext4/inode.c mishandled the case of a root directory with a zero i_links_count, which allowed attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image (bnc#1087012).

- CVE-2018-12233: In the ea_get function in fs/jfs/xattr.c, a memory corruption bug in JFS could be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr. (bsc#1097234)

Solution

Update the affected the Linux Kernel packages.

Plugin Details

Severity: High

ID: 110658

File Name: openSUSE-2018-656.nasl

Version: 1.8

Type: local

Agent: unix

Family: SuSE Local Security Checks

Published: 6/22/2018

Updated: 9/18/2024

Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-12233

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2018-5848

Vulnerability Information

CPE: p-cpe:/a:novell:opensuse:kernel-debug-debuginfo, p-cpe:/a:novell:opensuse:kernel-default-base, p-cpe:/a:novell:opensuse:kernel-vanilla-debugsource, p-cpe:/a:novell:opensuse:kernel-default, p-cpe:/a:novell:opensuse:kernel-macros, p-cpe:/a:novell:opensuse:kernel-default-debugsource, p-cpe:/a:novell:opensuse:kernel-vanilla-base, p-cpe:/a:novell:opensuse:kselftests-kmp-default-debuginfo, p-cpe:/a:novell:opensuse:kernel-vanilla-devel, p-cpe:/a:novell:opensuse:kernel-vanilla-debuginfo, p-cpe:/a:novell:opensuse:kernel-debug-devel-debuginfo, p-cpe:/a:novell:opensuse:kernel-devel, p-cpe:/a:novell:opensuse:kernel-obs-build, p-cpe:/a:novell:opensuse:kernel-debug-devel, p-cpe:/a:novell:opensuse:kselftests-kmp-debug-debuginfo, p-cpe:/a:novell:opensuse:kernel-debug-debugsource, p-cpe:/a:novell:opensuse:kernel-obs-qa, p-cpe:/a:novell:opensuse:kernel-default-debuginfo, p-cpe:/a:novell:opensuse:kernel-source-vanilla, p-cpe:/a:novell:opensuse:kernel-default-base-debuginfo, p-cpe:/a:novell:opensuse:kselftests-kmp-vanilla-debuginfo, p-cpe:/a:novell:opensuse:kernel-debug, p-cpe:/a:novell:opensuse:kselftests-kmp-debug, cpe:/o:novell:opensuse:42.3, p-cpe:/a:novell:opensuse:kselftests-kmp-default, p-cpe:/a:novell:opensuse:kernel-debug-base-debuginfo, p-cpe:/a:novell:opensuse:kernel-vanilla, p-cpe:/a:novell:opensuse:kselftests-kmp-vanilla, p-cpe:/a:novell:opensuse:kernel-docs-pdf, p-cpe:/a:novell:opensuse:kernel-debug-base, p-cpe:/a:novell:opensuse:kernel-source, p-cpe:/a:novell:opensuse:kernel-obs-build-debugsource, p-cpe:/a:novell:opensuse:kernel-syms, p-cpe:/a:novell:opensuse:kernel-vanilla-base-debuginfo, p-cpe:/a:novell:opensuse:kernel-default-devel, p-cpe:/a:novell:opensuse:kernel-docs-html

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/21/2018

Vulnerability Publication Date: 12/18/2017

Reference Information

CVE: CVE-2017-13305, CVE-2017-17741, CVE-2017-18241, CVE-2017-18249, CVE-2018-1092, CVE-2018-1093, CVE-2018-1094, CVE-2018-12233, CVE-2018-3639, CVE-2018-3665, CVE-2018-5848

Detections

Analytics