The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. The following new feature was added :

  - NVDIMM memory error notification (ACPI 6.2) The     following security bugs were fixed :

  - CVE-2018-13406: An integer overflow in the     uvesafb_setcmap function could have result in local     attackers being able to crash the kernel or potentially     elevate privileges because kmalloc_array is not used     (bnc#1100418)

  - CVE-2018-13053: The alarm_timer_nsleep function had an     integer overflow via a large relative timeout because     ktime_add_safe was not used (bnc#1099924)

  - CVE-2018-9385: Prevent overread of the 'driver_override'     buffer (bsc#1100491)

  - CVE-2018-13405: The inode_init_owner function allowed     local users to create files with an unintended group     ownership allowing attackers to escalate privileges by     making a plain file executable and SGID (bnc#1100416)

  - CVE-2017-5753: Systems with microprocessors utilizing     speculative execution and branch prediction may have     allowed unauthorized disclosure of information to an     attacker with local user access via a side-channel     analysis (bsc#1068032)

  - CVE-2018-1118: Linux kernel vhost did not properly     initialize memory in messages passed between virtual     guests and the host operating system. This could have     allowed local privileged users to read some kernel     memory contents when reading from the /dev/vhost-net     device file (bsc#1092472)

  - CVE-2018-12233: A memory corruption bug in JFS could     have been triggered by calling setxattr twice with two     different extended attribute names on the same file.
    This vulnerability could be triggered by an unprivileged     user with the ability to create files and execute     programs (bsc#1097234)

  - 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 could have caused a buffer overflow     (bnc#1097356)

  - CVE-2018-1000204: Prevent infoleak caused by incorrect     handling of the SG_IO ioctl (bsc#1096728)

  - CVE-2018-3639: Systems with microprocessors utilizing     speculative execution and speculative execution of     memory reads the addresses of all prior memory writes     are known may have allowed unauthorized disclosure of     information to an attacker with local user access via a     side-channel analysis, aka Speculative Store Bypass     (SSB), Variant 4 (bsc#1087082)

  - CVE-2018-1120: By mmap()ing a FUSE-backed file onto a     process's memory containing command line arguments (or     environment strings), an attacker could have caused     utilities from psutils or procps (such as ps, w) to     block indefinitely (denial of service) or for some     controlled time (as a synchronization primitive for     other attacks) (bsc#1093158)

  - CVE-2018-1094: The ext4_fill_super function 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 (bsc#1087007)

  - CVE-2018-1092: The ext4_iget function 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 (bsc#1087012)

  - 1093: The ext4_valid_block_bitmap function 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 (bsc#1087095)

  - CVE-2018-1000200: Prevent NULL pointer dereference which     could have resulted in an out of memory (OOM) killing of     large mlocked processes (bsc#1090150)

  - CVE-2018-1130: NULL pointer dereference in     dccp_write_xmit() function that allowed a local user to     cause a denial of service by a number of certain crafted     system calls (bsc#1092904)

  - CVE-2018-5803: Prevent error in the '_sctp_make_chunk()'     function when handling SCTP packets length that could     have been exploited to cause a kernel crash     (bnc#1083900)

  - CVE-2018-7492: Prevent NULL pointer dereference in the     net/rds/rdma.c __rds_rdma_map() function that allowed     local attackers to cause a system panic and a     denial-of-service, related to RDS_GET_MR and     RDS_GET_MR_FOR_DEST (bsc#1082962)

  - CVE-2018-8781: The udl_fb_mmap function had an     integer-overflow vulnerability allowing local users with     access to the udldrmfb driver to obtain full read and     write permissions on kernel physical pages, resulting in     a code execution in kernel space (bsc#1090643)

  - CVE-2018-10124: The kill_something_info function in     kernel/signal.c might have allowed local users to cause     a denial of service via an INT_MIN argument     (bnc#1089752)

  - CVE-2018-10087: The kernel_wait4 function in     kernel/exit.c might have allowed local users to cause a     denial of service by triggering an attempted use of the

-INT_MIN value (bnc#1089608)

  - CVE-2017-5715: Prevent unauthorized disclosure of     information to an attacker with local user access caused     by speculative execution and indirect branch prediction     (bsc#1068032)

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.

This update for xen fixes several issues. This feature was added :

  - Added support for qemu monitor command These security     issues were fixed :

  - CVE-2018-3639: Prevent attackers with local user access     from extracting information via a side-channel analysis,     aka Speculative Store Bypass (SSB), Variant 4     (bsc#1092631).

  - CVE-2017-5753,CVE-2017-5715,CVE-2017-5754: Improved     Spectre v2 mitigations (bsc#1074562).

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.

This update for xen fixes several issues.

This feature was added :

Added support for qemu monitor command

These security issues were fixed: CVE-2018-3639: Prevent attackers with local user access from extracting information via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4 (bsc#1092631).

CVE-2017-5753,CVE-2017-5715,CVE-2017-5754: Improved Spectre v2 mitigations (bsc#1074562).

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.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:1649 advisory.

  - hw: cpu: speculative store bypass (CVE-2018-3639)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

An update for kernel-rt is now available for Red Hat Enterprise MRG 2.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es) :

* An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639)

Note: This issue is present in hardware and cannot be fully fixed via software update. The updated kernel packages provide software side of the mitigation for this hardware issue. To be fully functional, up-to-date CPU microcode applied on the system is required. Please refer to References section for further information about this issue, CPU microcode requirements and the potential performance impact.

Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:1655 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines     that use KVM in environments managed by Red Hat products.

    Security Fix(es):

    * An industry-wide issue was found in the way many modern microprocessor designs have implemented     speculative execution of Load & Store instructions (a commonly used performance optimization). It relies     on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact     that memory read from address to which a recent memory write has occurred may see an older value and     subsequently cause an update into the microprocessor's data cache even for speculatively executed     instructions that never actually commit (retire). As a result, an unprivileged attacker could use this     flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639)

    Note: This is the qemu-kvm-rhev side of the CVE-2018-3639 mitigation.

    Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project     Zero) for reporting this issue.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This update provides mitigations for the Spectre v4 variant in x86-based micro processors. On Intel CPUs this requires updated microcode which is currently not released publicly (but your hardware vendor may have issued an update). For servers with AMD CPUs no microcode update is needed, please refer to https://xenbits.xen.org/xsa/advisory-263.html for further information.

ID	Name	Product	Family	Published	Updated	Severity
120067	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2018:2092-1) (Spectre)	Nessus	SuSE Local Security Checks	1/2/2019	1/9/2026	high
110596	SUSE SLES12 Security Update : xen (SUSE-SU-2018:1699-1) (Meltdown) (Spectre)	Nessus	SuSE Local Security Checks	6/18/2018	1/12/2026	medium
118266	SUSE SLES12 Security Update : xen (SUSE-SU-2018:1699-2) (Meltdown) (Spectre)	Nessus	SuSE Local Security Checks	10/22/2018	1/9/2026	medium
110000	RHEL 7 : java-1.8.0-openjdk (RHSA-2018:1649)	Nessus	Red Hat Local Security Checks	5/23/2018	1/13/2026	medium
110073	RHEL 6 : MRG (RHSA-2018:1642) (Spectre)	Nessus	Red Hat Local Security Checks	5/24/2018	1/12/2026	medium
110075	RHEL 7 : qemu-kvm-rhev (RHSA-2018:1655)	Nessus	Red Hat Local Security Checks	5/24/2018	1/12/2026	medium
110102	Debian DSA-4210-1 : xen - security update (Spectre)	Nessus	Debian Local Security Checks	5/25/2018	1/12/2026	medium

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