Oracle Linux 8：virt: ol / 和 / virt-devel: rhel (ELSA-2021-3061)
medium Nessus 插件 ID 152538
语言：
简介
远程 Oracle Linux 主机缺少一个或多个安全更新。描述
远程 Oracle Linux 8 主机上安装的程序包受到 ELSA-2021-3061 公告中提及的多个漏洞的影响。- 客户机 OS 用户可利用 QEMU 4.2.1 的 net/eth.c 中的 eth_get_gso_type 触发断言失败。客户机可通过缺少有效的第 3 层协议的数据包数据造成 QEMU 进程崩溃。(CVE-2020-27617)
- QEMU 4.2.0 中的 hw/pci/msix.c 允许客户机操作系统用户通过在 msi-x mmio 操作中构建地址来触发越界访问。(CVE-2020-13754)
- 在 aarch64 平台上，QEMU qemu 4.2.0 及之前版本的 ARM Generic Interrupt Controller 仿真器中发现越界堆缓冲区访问问题。出现此问题的原因在于将中断 ID 写入控制器内存区域时，并未将其屏蔽为 4 位宽。更新控制器状态字段及其后续处理时可能出现上述问题。客户机特权用户可能利用此缺陷造成主机上的 QEMU 进程崩溃，进而导致 DoS 情形。(CVE-2021-20221)
- 在 1.3.20 之前版本的 hivex 库中发现一个缺陷。造成此缺陷的原因在于，hivex_open 函数中缺少边界检查。攻击者可输入特别构建的 Windows 注册表 (hive) 文件，从而导致 hivex 读取超出正常边界的内存，或造成程序崩溃。此漏洞最大的威胁在于系统可用性。(CVE-2021-3504)
- 在 QEMU 5.2.0 及其之前版本的各种 NIC 仿真器中发现通过无限循环导致的潜在堆栈溢出问题。在 NIC 的环回模式（会绕过可重入的 DMA 检查）中会发生此问题。客户机用户/进程可能会利用此缺陷消耗 CPU 周期或造成主机上的 QEMU 进程崩溃，进而导致 DoS 情形。(CVE-2021-3416)
请注意，Nessus 尚未测试此问题，而是只依靠应用程序自我报告的版本号来判断。
解决方案
更新受影响的程序包。另见
插件详情
严重性: Medium
ID: 152538
文件名: oraclelinux_ELSA-2021-3061.nasl
版本: 1.3
类型: local
代理: unix
发布时间: 2021/8/13
最近更新时间: 2022/5/9
支持的传感器: Frictionless Assessment Agent, Nessus Agent, Nessus
风险信息
VPR
风险因素: Medium
分数: 5.9
CVSS v2
风险因素: Medium
基本分数: 5.8
时间分数: 4.3
矢量: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P
CVSS 分数来源: CVE-2021-3504
CVSS v3
风险因素: Medium
基本分数: 6.7
时间分数: 5.8
矢量: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
时间矢量: CVSS:3.0/E:U/RL:O/RC:C
CVSS 分数来源: CVE-2020-13754
漏洞信息
CPE: cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:hivex, p-cpe:/a:oracle:linux:hivex-devel, p-cpe:/a:oracle:linux:libguestfs, p-cpe:/a:oracle:linux:libguestfs-bash-completion, p-cpe:/a:oracle:linux:libguestfs-benchmarking, p-cpe:/a:oracle:linux:libguestfs-devel, p-cpe:/a:oracle:linux:libguestfs-gfs2, p-cpe:/a:oracle:linux:libguestfs-gobject, p-cpe:/a:oracle:linux:libguestfs-gobject-devel, p-cpe:/a:oracle:linux:libguestfs-inspect-icons, p-cpe:/a:oracle:linux:libguestfs-java, p-cpe:/a:oracle:linux:libguestfs-java-devel, p-cpe:/a:oracle:linux:libguestfs-javadoc, p-cpe:/a:oracle:linux:libguestfs-man-pages-ja, p-cpe:/a:oracle:linux:libguestfs-man-pages-uk, p-cpe:/a:oracle:linux:libguestfs-rescue, p-cpe:/a:oracle:linux:libguestfs-rsync, p-cpe:/a:oracle:linux:libguestfs-tools, p-cpe:/a:oracle:linux:libguestfs-tools-c, p-cpe:/a:oracle:linux:libguestfs-winsupport, p-cpe:/a:oracle:linux:libguestfs-xfs, p-cpe:/a:oracle:linux:libiscsi, p-cpe:/a:oracle:linux:libiscsi-devel, p-cpe:/a:oracle:linux:libiscsi-utils, p-cpe:/a:oracle:linux:libnbd, p-cpe:/a:oracle:linux:libnbd-devel, p-cpe:/a:oracle:linux:libvirt, p-cpe:/a:oracle:linux:libvirt-admin, p-cpe:/a:oracle:linux:libvirt-bash-completion, p-cpe:/a:oracle:linux:libvirt-client, p-cpe:/a:oracle:linux:libvirt-daemon, p-cpe:/a:oracle:linux:libvirt-daemon-config-network, p-cpe:/a:oracle:linux:libvirt-daemon-config-nwfilter, p-cpe:/a:oracle:linux:libvirt-daemon-driver-interface, p-cpe:/a:oracle:linux:libvirt-daemon-driver-network, p-cpe:/a:oracle:linux:libvirt-daemon-driver-nodedev, p-cpe:/a:oracle:linux:libvirt-daemon-driver-nwfilter, p-cpe:/a:oracle:linux:libvirt-daemon-driver-qemu, 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-core, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-disk, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-gluster, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-iscsi, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-iscsi-direct, 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:libvirt-daemon-driver-storage-rbd, p-cpe:/a:oracle:linux:libvirt-daemon-driver-storage-scsi, p-cpe:/a:oracle:linux:libvirt-daemon-kvm, p-cpe:/a:oracle:linux:libvirt-dbus, p-cpe:/a:oracle:linux:libvirt-devel, p-cpe:/a:oracle:linux:libvirt-docs, p-cpe:/a:oracle:linux:libvirt-libs, p-cpe:/a:oracle:linux:libvirt-lock-sanlock, p-cpe:/a:oracle:linux:libvirt-nss, p-cpe:/a:oracle:linux:lua-guestfs, p-cpe:/a:oracle:linux:nbdfuse, p-cpe:/a:oracle:linux:nbdkit, 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-curl-plugin, p-cpe:/a:oracle:linux:nbdkit-devel, p-cpe:/a:oracle:linux:nbdkit-example-plugins, p-cpe:/a:oracle:linux:nbdkit-gzip-plugin, p-cpe:/a:oracle:linux:nbdkit-linuxdisk-plugin, p-cpe:/a:oracle:linux:nbdkit-python-plugin, p-cpe:/a:oracle:linux:nbdkit-server, p-cpe:/a:oracle:linux:nbdkit-ssh-plugin, p-cpe:/a:oracle:linux:nbdkit-vddk-plugin, p-cpe:/a:oracle:linux:nbdkit-xz-filter, p-cpe:/a:oracle:linux:netcf, p-cpe:/a:oracle:linux:netcf-devel, p-cpe:/a:oracle:linux:netcf-libs, p-cpe:/a:oracle:linux:ocaml-hivex, p-cpe:/a:oracle:linux:ocaml-hivex-devel, p-cpe:/a:oracle:linux:ocaml-libguestfs, p-cpe:/a:oracle:linux:ocaml-libguestfs-devel, p-cpe:/a:oracle:linux:ocaml-libnbd, p-cpe:/a:oracle:linux:ocaml-libnbd-devel, p-cpe:/a:oracle:linux:perl-sys-guestfs, p-cpe:/a:oracle:linux:perl-sys-virt, p-cpe:/a:oracle:linux:perl-hivex, p-cpe:/a:oracle:linux:python3-hivex, p-cpe:/a:oracle:linux:python3-libguestfs, p-cpe:/a:oracle:linux:python3-libnbd, p-cpe:/a:oracle:linux:python3-libvirt, p-cpe:/a:oracle:linux:qemu-guest-agent, p-cpe:/a:oracle:linux:qemu-img, p-cpe:/a:oracle:linux:qemu-kvm, p-cpe:/a:oracle:linux:qemu-kvm-block-curl, p-cpe:/a:oracle:linux:qemu-kvm-block-gluster, p-cpe:/a:oracle:linux:qemu-kvm-block-iscsi, p-cpe:/a:oracle:linux:qemu-kvm-block-rbd, p-cpe:/a:oracle:linux:qemu-kvm-block-ssh, p-cpe:/a:oracle:linux:qemu-kvm-common, p-cpe:/a:oracle:linux:qemu-kvm-core, p-cpe:/a:oracle:linux:qemu-kvm-tests, p-cpe:/a:oracle:linux:ruby-hivex, p-cpe:/a:oracle:linux:ruby-libguestfs, p-cpe:/a:oracle:linux:seabios, p-cpe:/a:oracle:linux:seabios-bin, p-cpe:/a:oracle:linux:seavgabios-bin, p-cpe:/a:oracle:linux:sgabios, p-cpe:/a:oracle:linux:sgabios-bin, p-cpe:/a:oracle:linux:supermin, p-cpe:/a:oracle:linux:supermin-devel, p-cpe:/a:oracle:linux:virt-dib, p-cpe:/a:oracle:linux:virt-v2v
必需的 KB 项: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled
易利用性: No known exploits are available
补丁发布日期: 2021/8/12
漏洞发布日期: 2020/6/2
参考资料信息
CVE: CVE-2020-13754, CVE-2020-27617, CVE-2021-20221, CVE-2021-3416, CVE-2021-3504
IAVB: 2020-B-0041-S, 2020-B-0063-S