Ubuntu 20.04 LTS:Linux 核心弱點 (USN-5091-1)

high Nessus Plugin ID 153769

Synopsis

遠端 Ubuntu 主機缺少一個或多個安全性更新。

描述

遠端 Ubuntu 20.04 LTS 主機上安裝的套件受到 USN-5091-1 公告中所提及的多個弱點影響。

- 在 Linux 核心 5.14-rc3 之前版本的追蹤模組功能中,發現使用者追蹤環形緩衝區的特定方式中缺少 CPU 資源。僅取得特權的本機使用者 (藉由 CAP_SYS_ADMIN 功能 ) 可利用此缺陷來耗盡資源,進而引發拒絕服務。
(CVE-2021-3679)

- 在 5.12.13 之前的 Linux 核心的 kernel/bpf/verifier.c 中,分支可能會發生錯誤預測 (例如,因類型混淆所致),因此無權限的 BPF 程式可透過旁路攻擊讀取任意記憶體位置,即 CID -9183671af6db。(CVE-2021-33624)

- 在 powerpc 平台上 5.13.5 版之前的 Linux 核心 中,arch/powerpc/kvm/book3s_rtas.c 允許 KVM 來賓 OS 使用者透過 rtas_args.nargs 造成主機 OS 記憶體損毀,亦稱 CID-f62f3c20647e。(CVE-2021-37576)

- **有爭議** 在 Linux 核心 5.13.4 之前版本的 drivers/char/virtio_console.c 中,未受信任的裝置提供超出緩衝區大小的 buf->len 值時可觸發資料損毀或丟失。注意:
廠商指出,上述資料損毀在現有的所有使用案例中都不是弱點;新增長度驗證只是為了在主機 OS 行為異常時保持穩健。
(CVE-2021-38160)

- 在 Linux 核心 5.13.4 之前版本中,fs/nfs/nfs4client.c 中存在 connection-setup 排序錯誤問題。遠端 NFSv4 伺服器操作者可以藉由特殊安排,使應用程式無法在中繼偵測期間存取這些伺服器,進而造成拒絕服務 (掛接無回應)。(CVE-2021-38199)

- 在 Linux 核心 5.13.6 之前版本中,drivers/usb/host/max3421-hcd.c 允許鄰近攻擊者藉由在某些情況下移除 MAX-3421 USB 設備來造成拒絕服務 (釋放後使用和損壞)。(CVE-2021-38204)

請注意,Nessus 並未測試此問題,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

https://ubuntu.com/security/notices/USN-5091-1

Plugin 詳細資訊

嚴重性: High

ID: 153769

檔案名稱: ubuntu_USN-5091-1.nasl

版本: 1.2

類型: local

代理程式: unix

已發布: 2021/9/28

已更新: 2021/9/28

支持的傳感器: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

風險資訊

VPR

風險因素: Medium

分數: 6.7

CVSS v2

風險因素: High

基本分數: 7.2

時間分數: 5.3

媒介: AV:L/AC:L/Au:N/C:C/I:C/A:C

時間媒介: E:U/RL:OF/RC:C

CVSS 評分資料來源: CVE-2021-38160

CVSS v3

風險因素: High

基本分數: 7.8

時間分數: 6.8

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

時間媒介: E:U/RL:O/RC:C

弱點資訊

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-aws-cloud-tools-5.4.0-1057, p-cpe:/a:canonical:ubuntu_linux:linux-aws-headers-5.4.0-1057, p-cpe:/a:canonical:ubuntu_linux:linux-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-aws-tools-5.4.0-1057, p-cpe:/a:canonical:ubuntu_linux:linux-azure-cloud-tools-5.4.0-1059, p-cpe:/a:canonical:ubuntu_linux:linux-azure-headers-5.4.0-1059, p-cpe:/a:canonical:ubuntu_linux:linux-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-azure-tools-5.4.0-1059, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-88, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-common, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-generic, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-crashdump, p-cpe:/a:canonical:ubuntu_linux:linux-gcp-headers-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-gcp-tools-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-generic, p-cpe:/a:canonical:ubuntu_linux:linux-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-gke, p-cpe:/a:canonical:ubuntu_linux:linux-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-gke-headers-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-gke-tools-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-cloud-tools-5.4.0-1024, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-headers-5.4.0-1024, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-source-5.4.0, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-tools-5.4.0-1024, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-headers-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gke, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-headers-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-headers-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-headers-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-headers-oem, p-cpe:/a:canonical:ubuntu_linux:linux-headers-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-headers-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-headers-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-extra-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-image-extra-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-extra-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-kvm-headers-5.4.0-1047, p-cpe:/a:canonical:ubuntu_linux:linux-kvm-tools-5.4.0-1047, p-cpe:/a:canonical:ubuntu_linux:linux-libc-dev, p-cpe:/a:canonical:ubuntu_linux:linux-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gke, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-oem, p-cpe:/a:canonical:ubuntu_linux:linux-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-oem-osp1-tools-host, p-cpe:/a:canonical:ubuntu_linux:linux-oem-tools-host, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-headers-5.4.0-1055, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-tools-5.4.0-1055, p-cpe:/a:canonical:ubuntu_linux:linux-source, p-cpe:/a:canonical:ubuntu_linux:linux-source-5.4.0, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-tools-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-common, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gke, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-tools-host, p-cpe:/a:canonical:ubuntu_linux:linux-tools-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-tools-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-tools-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oem, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-tools-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-virtual-hwe-18.04-edge

必要的 KB 項目: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

可輕鬆利用: No known exploits are available

修補程式發佈日期: 2021/9/28

弱點發布日期: 2021/6/23

參考資訊

CVE: CVE-2021-3679, CVE-2021-33624, CVE-2021-37576, CVE-2021-38160, CVE-2021-38199, CVE-2021-38204

USN: 5091-1