SUSE Security Update: Security update for the Linux Kernel (Live Patch 13 for SLE 12 SP2)
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:1545-1
Rating:             important
References:         #1083125 #1085447 #1090368 #1090646 #1090869 
                    
Cross-References:   CVE-2017-13166 CVE-2018-1087 CVE-2018-8781
                    CVE-2018-8897
Affected Products:
                    SUSE Linux Enterprise Server for SAP 12-SP2
                    SUSE Linux Enterprise Server 12-SP2-LTSS
______________________________________________________________________________

   An update that solves four vulnerabilities and has one
   errata is now available.

Description:

   This update for the Linux Kernel 4.4.74-92_38 fixes several issues.

   The following security issues were fixed:

   - CVE-2017-13166: An elevation of privilege vulnerability in the kernel
     v4l2 video driver was fixed. (bsc#1085447).
   - CVE-2018-8897: A statement in the System Programming Guide of the Intel
     64 and IA-32 Architectures Software Developer's Manual (SDM) was
     mishandled in the development of some or all operating-system kernels,
     resulting in unexpected behavior for #DB exceptions that are deferred by
     MOV SS or POP SS, as demonstrated by (for example) privilege escalation
     in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux
     kernel crash. The MOV to SS and POP SS instructions inhibit interrupts
     (including NMIs), data breakpoints, and single step trap exceptions
     until the instruction boundary following the next instruction (SDM Vol.
     3A; section 6.8.3). (The inhibited data breakpoints are those on memory
     accessed by the MOV to SS or POP to SS instruction itself.) Note that
     debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF)
     system flag (SDM Vol. 3A; section 2.3). If the instruction following the
     MOV to SS or POP to SS instruction is an instruction like SYSCALL,
     SYSENTER, INT 3, etc. that transfers control to the operating system at
     CPL < 3, the debug exception is delivered after the transfer to CPL < 3
     is complete. OS kernels may not expect this order of events and may
     therefore experience unexpected behavior when it occurs (bsc#1090368).
   - CVE-2018-8781: The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c
     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#1090646).
   - bsc#1083125: Fixed kgraft: small race in reversion code
   - CVE-2018-1087: kernel KVM was vulnerable to a flaw in the way the Linux
     kernel's KVM hypervisor handled exceptions delivered after a stack
     switch operation via Mov SS or Pop SS instructions. During the stack
     switch operation, the processor did not deliver interrupts and
     exceptions, rather they are delivered once the first instruction after
     the stack switch is executed. An unprivileged KVM guest user could use
     this flaw to crash the guest or, potentially, escalate their privileges
     in the guest (bsc#1090869) before


Patch Instructions:

   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 Server for SAP 12-SP2:

      zypper in -t patch SUSE-SLE-SAP-12-SP2-2018-1066=1

   - SUSE Linux Enterprise Server 12-SP2-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2018-1066=1



Package List:

   - SUSE Linux Enterprise Server for SAP 12-SP2 (x86_64):

      kgraft-patch-4_4_74-92_38-default-9-2.1

   - SUSE Linux Enterprise Server 12-SP2-LTSS (x86_64):

      kgraft-patch-4_4_74-92_38-default-9-2.1


References:

   https://www.suse.com/security/cve/CVE-2017-13166.html
   https://www.suse.com/security/cve/CVE-2018-1087.html
   https://www.suse.com/security/cve/CVE-2018-8781.html
   https://www.suse.com/security/cve/CVE-2018-8897.html
   https://bugzilla.suse.com/1083125
   https://bugzilla.suse.com/1085447
   https://bugzilla.suse.com/1090368
   https://bugzilla.suse.com/1090646
   https://bugzilla.suse.com/1090869

SUSE: 2018:1545-1 important: the Linux Kernel (Live Patch 13 for SLE 12 SP2)

June 5, 2018
An update that solves four vulnerabilities and has one errata is now available

Summary

This update for the Linux Kernel 4.4.74-92_38 fixes several issues. The following security issues were fixed: - CVE-2017-13166: An elevation of privilege vulnerability in the kernel v4l2 video driver was fixed. (bsc#1085447). - CVE-2018-8897: A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs (bsc#1090368). - CVE-2018-8781: The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c 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#1090646). - bsc#1083125: Fixed kgraft: small race in reversion code - CVE-2018-1087: kernel KVM was vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest (bsc#1090869) before Patch Instructions: 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 Server for SAP 12-SP2: zypper in -t patch SUSE-SLE-SAP-12-SP2-2018-1066=1 - SUSE Linux Enterprise Server 12-SP2-LTSS: zypper in -t patch SUSE-SLE-SERVER-12-SP2-2018-1066=1 Package List: - SUSE Linux Enterprise Server for SAP 12-SP2 (x86_64): kgraft-patch-4_4_74-92_38-default-9-2.1 - SUSE Linux Enterprise Server 12-SP2-LTSS (x86_64): kgraft-patch-4_4_74-92_38-default-9-2.1

References

#1083125 #1085447 #1090368 #1090646 #1090869

Cross- CVE-2017-13166 CVE-2018-1087 CVE-2018-8781

CVE-2018-8897

Affected Products:

SUSE Linux Enterprise Server for SAP 12-SP2

SUSE Linux Enterprise Server 12-SP2-LTSS

https://www.suse.com/security/cve/CVE-2017-13166.html

https://www.suse.com/security/cve/CVE-2018-1087.html

https://www.suse.com/security/cve/CVE-2018-8781.html

https://www.suse.com/security/cve/CVE-2018-8897.html

https://bugzilla.suse.com/1083125

https://bugzilla.suse.com/1085447

https://bugzilla.suse.com/1090368

https://bugzilla.suse.com/1090646

https://bugzilla.suse.com/1090869

Severity
Announcement ID: SUSE-SU-2018:1545-1
Rating: important

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