Oracle Linux 8：kvm_utils (ELSA-2022-9460)
high Nessus Plugin ID 161895
語系：
概要
遠端 Oracle Linux 主機缺少一個或多個安全性更新。說明
遠端 Oracle Linux 8 主機中安裝的套件受到 ELSA-2022-9460 公告中提及的多個弱點影響。- 在 QEMU 的 virtio-net 裝置中發現一個釋放後使用弱點。當描述符號的位址屬於非直接存取區域時，可能會發生此問題，這是因為在取消對應 virtqueue elem 後設定了 num_buffers 所致。惡意來賓使用者可利用此缺陷造成 QEMU 損毀，進而造成拒絕服務或可能以 QEMU 處理程序的權限在主機上執行程式碼。(CVE-2021-3748)
- 在 QEMU 的 virtio-net 裝置中發現一個缺陷。此缺陷因修正 CVE-2021-3748 而意外引入，原因是在發生錯誤時忘記取消對應已快取的 virtqueue 元素，進而導致記憶體洩漏和其他未預期的結果。受到影響的 QEMU 版本是：6.2.0. (CVE-2022-26353)
- 在 QEMU 的 vhost-vsock 裝置中發現一個缺陷。在發生錯誤的情況下，未在釋放記憶體前從 virtqueue 卸離無效元素，進而導致記憶體洩漏和其他未預期的結果。
QEMU 6.2.0 及之前版本會受到影響。(CVE-2022-26354)
- 在 libvirt nwfilter 驅動程式中發現一個缺陷。virNWFilterObjListNumOfNWFilters 方法在反覆使用 virNWFilterObj 執行個體之前，無法取得 `driver->nwfilters` mutex。沒有任何保護措施可阻止其他執行緒並行修改 `driver->nwfilters` 物件。此缺陷讓惡意的無權限使用者可透過 libvirt 的 API virConnectNumOfNWFilters 惡意利用此問題，以損毀網路篩選器管理程序 (libvirtd/virtnwfilterd)。(CVE-2022-0897)
請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼。
解決方案
更新受影響的套件。另請參閱
Plugin 詳細資訊
嚴重性: High
ID: 161895
檔案名稱: oraclelinux_ELSA-2022-9460.nasl
版本: 1.3
類型: local
代理程式: unix
已發布: 2022/6/6
已更新: 2023/1/9
支援的感應器: Frictionless Assessment Agent, Nessus Agent, Nessus
風險資訊
VPR
風險因素: High
分數: 7.3
CVSS v2
風險因素: Medium
基本分數: 6.9
時間分數: 5.1
媒介: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS 評分資料來源: CVE-2021-3748
CVSS v3
風險因素: High
基本分數: 7.5
時間分數: 6.5
媒介: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
時間媒介: CVSS:3.0/E:U/RL:O/RC:C
弱點資訊
CPE: p-cpe:/a:oracle:linux:libvirt-daemon-kvm, p-cpe:/a:oracle:linux:nbdkit-devel, p-cpe:/a:oracle:linux:netcf, p-cpe:/a:oracle:linux:python3-libguestfs, p-cpe:/a:oracle:linux:supermin-devel, p-cpe:/a:oracle:linux:libguestfs-devel, p-cpe:/a:oracle:linux:libnbd-devel, p-cpe:/a:oracle:linux:libvirt-admin, p-cpe:/a:oracle:linux:libvirt-daemon, p-cpe:/a:oracle:linux:libvirt-daemon-driver-secret, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-iscsi, p-cpe:/a:oracle:linux:seabios-bin, p-cpe:/a:oracle:linux:libguestfs-java, p-cpe:/a:oracle:linux:libiscsi-utils, p-cpe:/a:oracle:linux:libvirt-client, p-cpe:/a:oracle:linux:libvirt-daemon-driver-network, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-scsi, p-cpe:/a:oracle:linux:libvirt-devel, p-cpe:/a:oracle:linux:libvirt-libs, p-cpe:/a:oracle:linux:netcf-devel, p-cpe:/a:oracle:linux:virt-dib, p-cpe:/a:oracle:linux:libguestfs-inspect-icons, p-cpe:/a:oracle:linux:libnbd, p-cpe:/a:oracle:linux:libvirt, p-cpe:/a:oracle:linux:nbdkit-gzip-plugin, p-cpe:/a:oracle:linux:qemu-kvm, p-cpe:/a:oracle:linux:libguestfs-javadoc, p-cpe:/a:oracle:linux:libguestfs-man-pages-ja, p-cpe:/a:oracle:linux:libguestfs-rescue, p-cpe:/a:oracle:linux:libvirt-daemon-driver-nwfilter, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-core, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-disk, p-cpe:/a:oracle:linux:python3-hivex, p-cpe:/a:oracle:linux:ruby-libguestfs, p-cpe:/a:oracle:linux:sgabios, p-cpe:/a:oracle:linux:libguestfs-tools-c, p-cpe:/a:oracle:linux:libvirt-daemon-config-nwfilter, p-cpe:/a:oracle:linux:libvirt-dbus, p-cpe:/a:oracle:linux:libvirt-lock-sanlock, p-cpe:/a:oracle:linux:nbdkit-ssh-plugin, p-cpe:/a:oracle:linux:qemu-img, p-cpe:/a:oracle:linux:seavgabios-bin, p-cpe:/a:oracle:linux:libguestfs-gfs2, p-cpe:/a:oracle:linux:libguestfs-java-devel, p-cpe:/a:oracle:linux:lua-guestfs, p-cpe:/a:oracle:linux:nbdkit-curl-plugin, p-cpe:/a:oracle:linux:qemu-kvm-block-iscsi, cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:libvirt-daemon-driver-interface, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-logical, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-mpath, p-cpe:/a:oracle:linux:nbdkit-server, p-cpe:/a:oracle:linux:perl-sys-virt, p-cpe:/a:oracle:linux:qemu-kvm-block-ssh, p-cpe:/a:oracle:linux:qemu-kvm-common, p-cpe:/a:oracle:linux:virt-v2v, p-cpe:/a:oracle:linux:hivex-devel, p-cpe:/a:oracle:linux:nbdkit-bash-completion, p-cpe:/a:oracle:linux:nbdkit-basic-filters, p-cpe:/a:oracle:linux:nbdkit-basic-plugins, p-cpe:/a:oracle:linux:nbdkit-python-plugin, p-cpe:/a:oracle:linux:qemu-guest-agent, p-cpe:/a:oracle:linux:sgabios-bin, p-cpe:/a:oracle:linux:libguestfs-benchmarking, p-cpe:/a:oracle:linux:libguestfs-gobject, p-cpe:/a:oracle:linux:libguestfs-man-pages-uk, p-cpe:/a:oracle:linux:libguestfs-rsync, p-cpe:/a:oracle:linux:libiscsi-devel, p-cpe:/a:oracle:linux:libvirt-bash-completion, p-cpe:/a:oracle:linux:libvirt-daemon-config-network, p-cpe:/a:oracle:linux:libvirt-daemon-driver-nodedev, p-cpe:/a:oracle:linux:nbdkit, p-cpe:/a:oracle:linux:nbdkit-vddk-plugin, p-cpe:/a:oracle:linux:qemu-kvm-block-rbd, p-cpe:/a:oracle:linux:ruby-hivex, p-cpe:/a:oracle:linux:hivex, p-cpe:/a:oracle:linux:libguestfs-bash-completion, p-cpe:/a:oracle:linux:python3-libnbd, p-cpe:/a:oracle:linux:qemu-kvm-block-curl, p-cpe:/a:oracle:linux:seabios, p-cpe:/a:oracle:linux:libguestfs-gobject-devel, p-cpe:/a:oracle:linux:libguestfs-tools, p-cpe:/a:oracle:linux:libguestfs-winsupport, p-cpe:/a:oracle:linux:libvirt-nss, p-cpe:/a:oracle:linux:netcf-libs, p-cpe:/a:oracle:linux:python3-libvirt, p-cpe:/a:oracle:linux:libguestfs, p-cpe:/a:oracle:linux:libiscsi, p-cpe:/a:oracle:linux:nbdkit-xz-filter, p-cpe:/a:oracle:linux:libguestfs-xfs, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-gluster, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-rbd, p-cpe:/a:oracle:linux:qemu-kvm-block-gluster, p-cpe:/a:oracle:linux:supermin, p-cpe:/a:oracle:linux:libvirt-docs, p-cpe:/a:oracle:linux:nbdfuse, p-cpe:/a:oracle:linux:libvirt-daemon-driver-qemu, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-iscsi-direct, p-cpe:/a:oracle:linux:nbdkit-example-plugins, p-cpe:/a:oracle:linux:nbdkit-linuxdisk-plugin, p-cpe:/a:oracle:linux:perl-sys-guestfs, p-cpe:/a:oracle:linux:perl-hivex, p-cpe:/a:oracle:linux:qemu-kvm-core
必要的 KB 項目: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled
可輕鬆利用: No known exploits are available
修補程式發佈日期: 2022/6/6
弱點發布日期: 2022/3/16
參考資訊
CVE: CVE-2021-3748, CVE-2022-0897, CVE-2022-26353, CVE-2022-26354