OracleVM 3.4 : xen (OVMSA-2018-0232) (Spectre)

Medium Nessus Plugin ID 110791

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 :

- BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8

- BUILDINFO: xen commit=b059d1de3b211fe5582c63f64b4822b9f85eafd2

- BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff

- BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba

- BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e

- BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee

- xend: fix memory leak of XendConfig.XendConfig object (Manjunath Patil) [Orabug: 28165871]

- x86/HVM: Restart ioreq processing state machine (Boris Ostrovsky)

- x86/spec-ctrl: Mitigations for LazyFPU (Andrew Cooper) [Orabug: 28135175] (CVE-2018-3665)

- x86: Support fully eager FPU context switching (Andrew Cooper) [Orabug: 28135175] (CVE-2018-3665)

- svm: fix incorrect TSC scaling (Haozhong Zhang) [Orabug:
27182906]

- x86/AMD-ucode: correct multiple container handling (Jan Beulich)

- x86, amd_ucode: fix coverity issues found in cpu_request_microcode (Aravind Gopalakrishnan) [Orabug:
28157269]

- [xenmicrocode] Fix error reporting on successful return from tool (Ross Philipson) [Orabug: 28128754]

- x86: correct default_xen_spec_ctrl calculation (Jan Beulich) [Orabug: 28035001]

- x86/msr: Virtualise MSR_SPEC_CTRL.SSBD for guests to use (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/Intel: Mitigations for GPZ SP4 - Speculative Store Bypass (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/AMD: Mitigations for GPZ SP4 - Speculative Store Bypass (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Introduce a new `spec-ctrl=` command line argument to replace `bti=` (Andrew Cooper) [Orabug:
28035001] (CVE-2018-3639)

- x86/cpuid: Improvements to guest policies for speculative sidechannel features (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Explicitly set Xen's default MSR_SPEC_CTRL value (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Split X86_FEATURE_SC_MSR into PV and HVM variants (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Elide MSR_SPEC_CTRL handling in idle context when possible (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Rename bits of infrastructure to avoid NATIVE and VMEXIT (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Fold the XEN_IBRS_[SET,CLEAR] ALTERNATIVES together (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Merge bti_ist_info and use_shadow_spec_ctrl into spec_ctrl_flags (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Express Xen's choice of MSR_SPEC_CTRL value as a variable (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Read MSR_ARCH_CAPABILITIES only once (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Assume that STIBP feature is always available (Boris Ostrovsky) [Orabug: 28035001] (CVE-2018-3639)

- x86/spec_ctrl: Updates to retpoline-safety decision making (Andrew Cooper) [Orabug: 28035001] (CVE-2018-3639)

- Revert 'x86/boot: Disable IBRS in intr/nmi exit path at bootup stage' (Boris Ostrovsky) [Orabug: 28035001] (CVE-2018-3639)

Solution

Update the affected xen / xen-tools packages.

See Also

https://oss.oracle.com/pipermail/oraclevm-errata/2018-June/000867.html

Plugin Details

Severity: Medium

ID: 110791

File Name: oraclevm_OVMSA-2018-0232.nasl

Version: 1.3

Type: local

Published: 2018/06/29

Modified: 2018/09/05

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 4.9

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

CVSSv3

Base Score: 5.6

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

Vulnerability Information

CPE: p-cpe:/a:oracle:vm:xen, p-cpe:/a:oracle:vm:xen-tools, cpe:/o:oracle:vm_server:3.4

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

Patch Publication Date: 2018/06/28

Reference Information

CVE: CVE-2018-3639, CVE-2018-3665