Fedora 33: FEDORA-2021-4f129cc0c1 Critical: Xen DoS Risks Fix

This package contains the XenD daemon and xm command line

tools, needed to manage virtual machines running under the

Xen hypervisor

IOMMU page mapping issues on x86 [XSA-378, CVE-2021-28694, CVE-2021-28695,

CVE-2021-28696] (#1997531) (#1997568) (#1997537) grant table v2 status pages may

remain accessible after de-allocation [XSA-379, CVE-2021-28697] (#1997520) long

running loops in grant table handling [XSA-380, CVE-2021-28698] (#1997526)

inadequate grant-v2 status frames array bounds check [XSA-382, CVE-2021-28699]

(#1997523) xen/arm: No memory limit for dom0less domUs [XSA-383, CVE-2021-28700]

(#1997527) grub x86_64-efi modules now go into /boot/grub2

* Sat Aug 28 2021 Michael Young - 4.14.2-3

- IOMMU page mapping issues on x86 [XSA-378, CVE-2021-28694,

CVE-2021-28695, CVE-2021-28696] (#1997531) (#1997568)

(#1997537)

- grant table v2 status pages may remain accessible after de-allocation

[XSA-379, CVE-2021-28697] (#1997520)

- long running loops in grant table handling [XSA-380, CVE-2021-28698]

(#1997526)

- inadequate grant-v2 status frames array bounds check [XSA-382,

CVE-2021-28699] (#1997523)

- xen/arm: No memory limit for dom0less domUs [XSA-383, CVE-2021-28700]

(#1997527)

- grub x86_64-efi modules now go into /boot/grub2

[ 1 ] Bug #1997519 - CVE-2021-28697 xen: malicious guest may be able to elevate its privileges leads to DoS

https://bugzilla.redhat.com/show_bug.cgi?id=1997519

[ 2 ] Bug #1997522 - CVE-2021-28699 xen: malicious guest kernel leads to DoS

https://bugzilla.redhat.com/show_bug.cgi?id=1997522

[ 3 ] Bug #1997524 - CVE-2021-28698 xen: malicious kernels lead to DoS

https://bugzilla.redhat.com/show_bug.cgi?id=1997524

[ 4 ] Bug #1997525 - CVE-2021-28700 xen: malicious dom0less guest could drive Xen out of memory and leads to DoS

https://bugzilla.redhat.com/show_bug.cgi?id=1997525

[ 5 ] Bug #1997529 - CVE-2021-28694 xen: failed to prevent guests from undoing/replacing such mappings

https://bugzilla.redhat.com/show_bug.cgi?id=1997529

[ 6 ] Bug #1997535 - CVE-2021-28696 xen: physical device from a guest allowing to access memory

https://bugzilla.redhat.com/show_bug.cgi?id=1997535

[ 7 ] Bug #1997567 - CVE-2021-28695 xen: discontinuous range is specified by firmware leads to vulnerability

https://bugzilla.redhat.com/show_bug.cgi?id=1997567

su -c 'dnf upgrade --advisory FEDORA-2021-4f129cc0c1' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

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https://fedoraproject.org/security/

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