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OracleVM 3.4 : Unbreakable / etc (OVMSA-2018-0008) (Meltdown) (Spectre)

medium Nessus Plugin ID 105762

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Synopsis

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

Description

The remote OracleVM system is missing necessary patches to address critical security updates :

 - x86/ia32: save and clear registers on syscall. (Jamie Iles) [Orabug: 27355759] (CVE-2017-5754)

 - x86/IBRS: Save current status of MSR_IA32_SPEC_CTRL (Boris Ostrovsky)

- pti: Rename X86_FEATURE_KAISER to X86_FEATURE_PTI (Pavel Tatashin) [Orabug: 27352353] (CVE-2017-5754)

 - usb/core: usb_alloc_dev: fix setting of ->portnum (Nicolai Stange)

- x86/spec_ctrl: Add missing IBRS_DISABLE (Konrad Rzeszutek Wilk)

 - Make use of ibrs_inuse consistent. (Jun Nakajima)

 - x86/kvm: Set IBRS on VMEXIT if guest disabled it.
 (Konrad Rzeszutek Wilk)

 - Re-introduce clearing of r12-15, rbp, rbx (Kris Van Hees) [Orabug: 27352353] (CVE-2017-5754)

 - x86: more ibrs/pti fixes (Pavel Tatashin) [Orabug:
 27352353] (CVE-2017-5754)

 - x86/spec: Actually do the check for in_use on ENABLE_IBRS (Konrad Rzeszutek Wilk) (CVE-2017-5715)

 - kvm: svm: Expose the CPUID.0x80000008 ebx flag. (Konrad Rzeszutek Wilk) (CVE-2017-5715)

 - x86/spec_ctrl: Provide the sysfs version of the ibrs_enabled (Konrad Rzeszutek Wilk) (CVE-2017-5715)

 - x86: Use better #define for FEATURE_ENABLE_IBRS and 0 (Konrad Rzeszutek Wilk) (CVE-2017-5715)

 - x86: Instead of 0x2, 0x4, and 0x1 use #defines. (Konrad Rzeszutek Wilk) (CVE-2017-5715)

 - kpti: Disable when running under Xen PV (Konrad Rzeszutek Wilk) [Orabug: 27352353] (CVE-2017-5754)

 - x86: Don't ENABLE_IBRS in nmi when we are still running on user cr3 (Konrad Rzeszutek Wilk) (CVE-2017-5715)

 - x86/enter: Use IBRS on syscall and interrupts - fix ia32 path (Konrad Rzeszutek Wilk) (CVE-2017-5715)

 - x86: Fix spectre/kpti integration (Konrad Rzeszutek Wilk) [Orabug: 27352353] (CVE-2017-5754)

 - PTI: unbreak EFI old_memmap (Jiri Kosina) [Orabug:
 27352353] (CVE-2017-5754)

 - KAISER KABI tweaks. (Martin K. Petersen) [Orabug:
 27352353] (CVE-2017-5754)

 - x86/ldt: fix crash in ldt freeing. (Jamie Iles) [Orabug:
 27352353] (CVE-2017-5754)

 - x86/entry: Define 'cpu_current_top_of_stack' for 64-bit code (Denys Vlasenko) [Orabug: 27352353] (CVE-2017-5754)

 - x86/entry: Remove unused 'kernel_stack' per-cpu variable (Denys Vlasenko) [Orabug: 27352353] (CVE-2017-5754)

 - x86/entry: Stop using PER_CPU_VAR(kernel_stack) (Denys Vlasenko) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: Set _PAGE_NX only if supported (Guenter Roeck) [Orabug: 27352353] (CVE-2017-5754)

 - x86/vdso: Get pvclock data from the vvar VMA instead of the fixmap (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - KPTI: Report when enabled (Kees Cook) [Orabug: 27352353] (CVE-2017-5754)

 - KPTI: Rename to PAGE_TABLE_ISOLATION (Kees Cook) [Orabug: 27352353] (CVE-2017-5754)

 - x86/kaiser: Move feature detection up (Borislav Petkov) [Orabug: 27352353] (CVE-2017-5754)

 - x86/kaiser: Reenable PARAVIRT (Borislav Petkov) [Orabug:
 27352353] (CVE-2017-5754)

 - x86/paravirt: Don't patch flush_tlb_single (Thomas Gleixner) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: kaiser_flush_tlb_on_return_to_user check PCID (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: asm/tlbflush.h handle noPGE at lower level (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: drop is_atomic arg to kaiser_pagetable_walk (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: use ALTERNATIVE instead of x86_cr3_pcid_noflush (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - x86/kaiser: Check boottime cmdline params (Borislav Petkov) [Orabug: 27352353] (CVE-2017-5754)

 - x86/kaiser: Rename and simplify X86_FEATURE_KAISER handling (Borislav Petkov) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: add 'nokaiser' boot option, using ALTERNATIVE (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: fix unlikely error in alloc_ldt_struct (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: _pgd_alloc without __GFP_REPEAT to avoid stalls (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: paranoid_entry pass cr3 need to paranoid_exit (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: x86_cr3_pcid_noflush and x86_cr3_pcid_user (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: PCID 0 for kernel and 128 for user (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: load_new_mm_cr3 let SWITCH_USER_CR3 flush user (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: enhanced by kernel and user PCIDs (Dave Hansen) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: vmstat show NR_KAISERTABLE as nr_overhead (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: delete KAISER_REAL_SWITCH option (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: name that 0x1000 KAISER_SHADOW_PGD_OFFSET (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: cleanups while trying for gold link (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: kaiser_remove_mapping move along the pgd (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: tidied up kaiser_add/remove_mapping slightly (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: tidied up asm/kaiser.h somewhat (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: ENOMEM if kaiser_pagetable_walk NULL (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: fix perf crashes (Hugh Dickins) [Orabug:
 27352353] (CVE-2017-5754)

 - kaiser: fix regs to do_nmi ifndef CONFIG_KAISER (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: KAISER depends on SMP (Hugh Dickins) [Orabug:
 27352353] (CVE-2017-5754)

 - kaiser: fix build and FIXME in alloc_ldt_struct (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: stack map PAGE_SIZE at THREAD_SIZE-PAGE_SIZE (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: do not set _PAGE_NX on pgd_none (Hugh Dickins) [Orabug: 27352353] (CVE-2017-5754)

 - kaiser: merged update (Dave Hansen) [Orabug: 27352353] (CVE-2017-5754)

 - KAISER: Kernel Address Isolation (Richard Fellner) [Orabug: 27352353] (CVE-2017-5754)

 - x86/boot: Add early cmdline parsing for options with arguments (Tom Lendacky) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm/64: Fix reboot interaction with CR4.PCIDE (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Enable CR4.PCIDE on supported systems (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Add the 'nopcid' boot option to turn off PCID (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Disable PCID on 32-bit kernels (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code (Andy Lutomirski) [Orabug:
 27352353] (CVE-2017-5754)

 - x86/mm: Reimplement flush_tlb_page using flush_tlb_mm_range (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Make flush_tlb_mm_range more predictable (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Remove flush_tlb and flush_tlb_current_task (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/vm86/32: Switch to flush_tlb_mm_range in mark_screen_rdonly (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/irq: Do not substract irq_tlb_count from irq_call_count (Aaron Lu) [Orabug: 27352353] (CVE-2017-5754)

 - sched/core: Idle_task_exit shouldn't use switch_mm_irqs_off (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - ARM: Hide finish_arch_post_lock_switch from modules (Steven Rostedt) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm, sched/core: Turn off IRQs in switch_mm (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm, sched/core: Uninline switch_mm (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Build arch/x86/mm/tlb.c even on !SMP (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - sched/core: Add switch_mm_irqs_off and use it in the scheduler (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - mm/mmu_context, sched/core: Fix mmu_context.h assumption (Ingo Molnar) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: If INVPCID is available, use it to flush global mappings (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Add a 'noinvpcid' boot option to turn off INVPCID (Andy Lutomirski) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Fix INVPCID asm constraint (Borislav Petkov) [Orabug: 27352353] (CVE-2017-5754)

 - x86/mm: Add INVPCID helpers (Andy Lutomirski) [Orabug:
 27352353] (CVE-2017-5754)

Solution

Update the affected kernel-uek / kernel-uek-firmware packages.

See Also

http://www.nessus.org/u?d39633bb

Plugin Details

Severity: Medium

ID: 105762

File Name: oraclevm_OVMSA-2018-0008.nasl

Version: 3.7

Type: local

Published: 1/12/2018

Updated: 9/27/2019

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

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

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 5.4

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

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

Vulnerability Information

CPE: p-cpe:/a:oracle:vm:kernel-uek, p-cpe:/a:oracle:vm:kernel-uek-firmware, cpe:/o:oracle:vm_server:3.4

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/11/2018

Vulnerability Publication Date: 1/4/2018

Reference Information

CVE: CVE-2017-5715, CVE-2017-5754

IAVA: 2018-A-0019, 2018-A-0020