The previous update to linux failed to build for the armhf (ARM EABI hard-float) architecture. This update corrects that. For all other architectures, there is no need to upgrade or reboot again. For reference, the relevant part of the original advisory text follows.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

CVE-2017-5715

Multiple researchers have discovered a vulnerability in various processors supporting speculative execution, enabling an attacker controlling an unprivileged process to read memory from arbitrary addresses, including from the kernel and all other processes running on the system.

This specific attack has been named Spectre variant 2 (branch target injection) and is mitigated for the x86 architecture (amd64 and i386) by using new microcoded features.

This mitigation requires an update to the processor's microcode, which is non-free. For recent Intel processors, this is included in the intel-microcode package from version 3.20180425.1~deb8u1. For other processors, it may be included in an update to the system BIOS or UEFI firmware, or in a later update to the amd64-microcode package.

This vulnerability was already mitigated for the x86 architecture by the 'retpoline' feature.

CVE-2017-5753

Further instances of code that was vulnerable to Spectre variant 1 (bounds-check bypass) have been mitigated.

CVE-2018-1066

Dan Aloni reported to Red Hat that the CIFS client implementation would dereference a NULL pointer if the server sent an invalid response during NTLMSSP setup negotiation. This could be used by a malicious server for denial of service.

The previously applied mitigation for this issue was not appropriate for Linux 3.16 and has been replaced by an alternate fix.

CVE-2018-1093

Wen Xu reported that a crafted ext4 filesystem image could trigger an out-of-bounds read in the ext4_valid_block_bitmap() function. A local user able to mount arbitrary filesystems could use this for denial of service.

CVE-2018-1130

The syzbot software found that the DCCP implementation of sendmsg() does not check the socket state, potentially leading to a NULL pointer dereference. A local user could use this to cause a denial of service (crash). 

CVE-2018-3665

Multiple researchers have discovered that some Intel x86 processors can speculatively read floating-point and vector registers even when access to those registers is disabled. The Linux kernel's 'lazy FPU' feature relies on that access control to avoid saving and restoring those registers for tasks that do not use them, and was enabled by default on x86 processors that do not support the XSAVEOPT instruction.

If 'lazy FPU' is enabled on one of the affected processors, an attacker controlling an unprivileged process may be able to read sensitive information from other users' processes or the kernel. This specifically affects processors based on the 'Nehalem' and 'Westemere' core designs. This issue has been mitigated by disabling 'lazy FPU' by default on all x86 processors that support the FXSAVE and FXRSTOR instructions, which includes all processors known to be affected and most processors that perform speculative execution. It can also be mitigated by adding the kernel parameter: eagerfpu=on

CVE-2018-5814

Jakub Jirasek reported race conditions in the USB/IP host driver. A malicious client could use this to cause a denial of service (crash or memory corruption), and possibly to execute code, on a USB/IP server.

CVE-2018-9422

It was reported that the futex() system call could be used by an unprivileged user for privilege escalation.

CVE-2018-10853

Andy Lutomirski and Mika Penttil&auml; reported that KVM for x86 processors did not perform a necessary privilege check when emulating certain instructions. This could be used by an unprivileged user in a guest VM to escalate their privileges within the guest.

CVE-2018-10940

Dan Carpenter reported that the optical disc driver (cdrom) does not correctly validate the parameter to the CDROM_MEDIA_CHANGED ioctl. A user with access to a cdrom device could use this to cause a denial of service (crash).

CVE-2018-11506

Piotr Gabriel Kosinski and Daniel Shapira reported that the SCSI optical disc driver (sr) did not allocate a sufficiently large buffer for sense data. A user with access to a SCSI optical disc device that can produce more than 64 bytes of sense data could use this to cause a denial of service (crash or memory corruption), and possibly for privilege escalation.

CVE-2018-12233

Shankara Pailoor reported that a crafted JFS filesystem image could trigger a denial of service (memory corruption). This could possibly also be used for privilege escalation.

CVE-2018-1000204

The syzbot software found that the SCSI generic driver (sg) would in some circumstances allow reading data from uninitialised buffers, which could include sensitive information from the kernel or other tasks. However, only privileged users with the CAP_SYS_ADMIN or CAP_SYS_RAWIO capability were allowed to do this, so this has little or no security impact.

For Debian 8 'Jessie', these problems have been fixed in version 3.16.57-1. This update additionally fixes Debian bug #898165, and includes many more bug fixes from stable update 3.16.57.

We recommend that you upgrade your linux packages.

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

The SUSE Linux Enterprise 11 SP3 LTSS kernel was updated to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2016-8405: An information disclosure vulnerability     in kernel components including the ION subsystem,     Binder, USB driver and networking subsystem could enable     a local malicious application to access data outside of     its permission levels. (bnc#1099942).

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

  - CVE-2018-1000204: A malformed SG_IO ioctl issued for a     SCSI device could lead to a local kernel information     leak manifesting in up to approximately 1000 memory     pages copied to the userspace. The problem has limited     scope as non-privileged users usually have no     permissions to access SCSI device files. (bnc#1096728).

  - CVE-2018-1068: A flaw was found in the implementation of     32-bit syscall interface for bridging. This allowed a     privileged user to arbitrarily write to a limited range     of kernel memory (bnc#1085107).

  - CVE-2018-1130: A NULL pointer dereference in     dccp_write_xmit() function in net/dccp/output.c allowed     a local user to cause a denial of service by a number of     certain crafted system calls (bnc#1092904).

  - CVE-2018-12233: In the ea_get function in fs/jfs/xattr.c     a memory corruption bug in JFS can 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     (bnc#1097234).

  - CVE-2018-13053: The alarm_timer_nsleep function in     kernel/time/alarmtimer.c had an integer overflow via a     large relative timeout because ktime_add_safe is not     used (bnc#1099924).

  - CVE-2018-13406: An integer overflow in the     uvesafb_setcmap function in     drivers/video/fbdev/uvesafb.c kernel could result in     local attackers being able to crash the kernel or     potentially elevate privileges because kmalloc_array is     not used (bnc#1098016 1100418).

  - 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-2018-5803: An error in the '_sctp_make_chunk()'     function (net/sctp/sm_make_chunk.c) when handling SCTP     packets length could be exploited to cause a kernel     crash (bnc#1083900).

  - CVE-2018-5814: Multiple race condition errors when     handling probe, disconnect, and rebind operations could     be exploited to trigger a use-after-free condition or a     NULL pointer dereference by sending multiple USB over IP     packets (bnc#1096480).

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

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.

ID	Name	Product	Family	Published	Updated	Severity
111082	Debian DLA-1422-2 : linux security update (Spectre)	Nessus	Debian Local Security Checks	7/16/2018	9/4/2024	high
111833	SUSE SLES11 Security Update : kernel (SUSE-SU-2018:2366-1) (Foreshadow)	Nessus	SuSE Local Security Checks	8/17/2018	8/16/2024	high
123226	openSUSE Security Update : the Linux Kernel (openSUSE-2019-536) (Spectre)	Nessus	SuSE Local Security Checks	3/27/2019	6/11/2024	high

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