Ubuntu 18.04 LTS / 20.04 LTS / 20.10:Linux 核心弱點 (USN-4917-1)

high Nessus Plugin ID 148690

Synopsis

遠端 Ubuntu 主機缺少一個或多個安全性更新。

描述

遠端 Ubuntu 18.04 LTS/20.04 LTS/20.10 主機上安裝的套件受到 USN-4917-1 公告中所提及的多個弱點影響。

- 在 Linux 核心 5.11.12 及之前的版本中,BPF JIT 編譯器的分支位移計算不正確,進而允許其在核心內容中執行任意程式碼。這會影響 arch/x86/net/bpf_jit_comp.c 和 arch/x86/net/bpf_jit_comp32.c。(CVE-2021-29154)

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-4917-1

Plugin 詳細資訊

嚴重性: High

ID: 148690

檔案名稱: ubuntu_USN-4917-1.nasl

版本: 1.5

類型: local

代理程式: unix

已發布: 2021/4/16

已更新: 2022/1/21

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: Critical

分數: 9.7

CVSS v2

風險因素: High

基本分數: 7.2

時間分數: 6.3

媒介: AV:L/AC:L/Au:N/C:C/I:C/A:C

時間媒介: E:H/RL:OF/RC:C

CVSS 評分資料來源: CVE-2021-3493

CVSS v3

風險因素: High

基本分數: 7.8

時間分數: 7.5

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:H/RL:O/RC:C

弱點資訊

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.10, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.10.0-1022-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1039-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1042-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-73-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-73-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1014-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1034-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1038-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1042-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1042-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1043-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1045-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1046-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-72-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-72-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-72-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1021-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1021-raspi-nolpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1024-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1026-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1028-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1029-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1030-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-generic-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04-edge, 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-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-20.04-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-generic-lpae-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke-5.3, 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-5.3, 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-lowlatency-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04b, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi-nolpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon-hwe-18.04-edge, 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-image-virtual-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-20.04-edge

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

可被惡意程式利用: true

可輕鬆利用: Exploits are available

修補程式發佈日期: 2021/4/15

弱點發布日期: 2021/4/8

惡意利用途徑

Metasploit (2021 Ubuntu Overlayfs LPE)

參考資訊

CVE: CVE-2021-3492, CVE-2021-3493, CVE-2021-29154

USN: 4917-1