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Sicherheitslücken in xen · Seite 13

In den letzten 30 Tagen veröffentlichte Sicherheitslücken für xen: 9. Davon im KEV-Katalog: 0.

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Sicherheitslücken: 488

  1. CVE-2018-15468

    Mittel · CVSS 6EPSS 0,34%Korrektur verfügbar

    CVE-2018-15468

    An issue was discovered in Xen through 4.11.x. The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case that vPMU is disabled, all value checking was skipped, allowing the guest to choose any MSR_DEBUGCTL setting it likes. A malicious or buggy guest administrator (on Intel x86 HVM or PVH) can lock up the entire host, causing a Denial of Service.

    • Auf 4.11.1~pre.20180911.5acdd26fdc+dfsg-2 aktualisieren
    Veröffentlicht Aktualisiert
  2. CVE-2018-3646

    Mittel · CVSS 5.6EPSS 8,1%Korrektur verfügbar

    CVE-2018-3646

    Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis.

    • Auf 4.11.1~pre.20180911.5acdd26fdc+dfsg-2 aktualisieren
    Veröffentlicht Aktualisiert
  3. CVE-2018-3620

    Mittel · CVSS 5.6EPSS 5,58%Korrektur verfügbar

    CVE-2018-3620

    Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access via a terminal page fault and a side-channel analysis.

    • Auf 4.11.1~pre.20180911.5acdd26fdc+dfsg-2 aktualisieren
    Veröffentlicht Aktualisiert
  4. CVE-2016-9603

    Mittel · CVSS 5.5EPSS 4,45%Korrektur verfügbar

    CVE-2016-9603

    A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

    • Auf 4.4.0-1 aktualisieren
    Veröffentlicht Aktualisiert
  5. CVE-2017-2620

    Mittel · CVSS 5.5EPSS 3,56%Korrektur verfügbar

    CVE-2017-2620

    Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process.

    • Auf 4.4.0-1 aktualisieren
    Veröffentlicht Aktualisiert
  6. CVE-2018-12893

    Mittel · CVSS 6.5EPSS 0,41%Korrektur verfügbar

    CVE-2018-12893

    An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vu

    • Auf 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 aktualisieren
    Veröffentlicht Aktualisiert
  7. CVE-2018-12892

    Kritisch · CVSS 9.9EPSS 2,52%Korrektur verfügbar

    CVE-2018-12892

    An issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probably an erroneous merge conflict resolution. Malicious guest administrators or (in some situations) users may be able to write to supposedly read-only disk images. Only emulated SCSI disks (specified as "sd" in the libxl disk configuration, or an equivalent) are affected. IDE disks ("hd") are not affected (because attempts to make them readonly are rejected). Additionally, CDROM devices (that is, devices specified to be presented to the guest as CDROMs, regardless of the nature of the backing storag

    • Auf 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 aktualisieren
    Veröffentlicht Aktualisiert
  8. CVE-2018-12891

    Mittel · CVSS 6.5EPSS 0,43%Korrektur verfügbar

    CVE-2018-12891

    An issue was discovered in Xen through 4.10.x. Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions through its own page table contents, a malicious guest may cause such bypasses to be used for an unbounded number of iterations. A malicious or buggy PV guest may cause a Denial of Service (DoS) affecting the entire host. Specifically, it may prevent use of a physical CPU for an indeterminate period of time. All Xen versions from 3.4 onwards are vulnera

    • Auf 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 aktualisieren
    Veröffentlicht Aktualisiert
  9. CVE-2018-3665

    Mittel · CVSS 5.6EPSS 0,63%Korrektur verfügbar

    CVE-2018-3665

    System software utilizing Lazy FP state restore technique on systems using Intel Core-based microprocessors may potentially allow a local process to infer data from another process through a speculative execution side channel.

    • Auf 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u8 aktualisieren
    Veröffentlicht Aktualisiert
  10. CVE-2018-3639

    Mittel · CVSS 5.5EPSS 60,63%Öffentlicher ExploitKorrektur verfügbar

    CVE-2018-3639

    Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.

    • Auf 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7 aktualisieren
    Veröffentlicht Aktualisiert
  11. CVE-2018-10982

    Hoch · CVSS 8.8EPSS 0,47%Korrektur verfügbar

    CVE-2018-10982

    An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service (unexpectedly high interrupt number, array overrun, and hypervisor crash) or possibly gain hypervisor privileges by setting up an HPET timer to deliver interrupts in IO-APIC mode, aka vHPET interrupt injection.

    • Auf 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u6 aktualisieren
    Veröffentlicht Aktualisiert
  12. CVE-2018-10981

    Mittel · CVSS 6.5EPSS 0,42%Korrektur verfügbar

    CVE-2018-10981

    An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service (host OS infinite loop) in situations where a QEMU device model attempts to make invalid transitions between states of a request.

    • Auf 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u6 aktualisieren
    Veröffentlicht Aktualisiert
  13. CVE-2018-8897

    Hoch · CVSS 7.8EPSS 18,48%Öffentlicher ExploitKorrektur verfügbar

    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

    • Auf 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u6 aktualisieren
    Veröffentlicht Aktualisiert
  14. CVE-2018-10472

    Mittel · CVSS 5.6EPSS 0,36%Korrektur verfügbar

    CVE-2018-10472

    An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users (in certain configurations) to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot.

    • Auf 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u6 aktualisieren
    Veröffentlicht Aktualisiert
  15. CVE-2018-10471

    Mittel · CVSS 6.5EPSS 0,42%Korrektur verfügbar

    CVE-2018-10471

    An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754.

    • Auf 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u6 aktualisieren
    Veröffentlicht Aktualisiert
  16. CVE-2018-7542

    Mittel · CVSS 6.5EPSS 0,38%Korrektur verfügbar

    CVE-2018-7542

    An issue was discovered in Xen 4.8.x through 4.10.x allowing x86 PVH guest OS users to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC.

    • Auf 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 aktualisieren
    Veröffentlicht Aktualisiert
  17. CVE-2017-5754

    Mittel · CVSS 5.6EPSS 67,41%Korrektur verfügbar

    CVE-2017-5754

    Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis of the data cache.

    • Auf 4.11.1~pre+1.733450b39b-1 aktualisieren
    Veröffentlicht Aktualisiert
  18. CVE-2017-5715

    Mittel · CVSS 5.6EPSS 73,25%Öffentlicher ExploitKorrektur verfügbar

    CVE-2017-5715

    Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.

    • Auf 4.11.1~pre+1.733450b39b-1 aktualisieren
    Veröffentlicht Aktualisiert

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