Ubuntu 18.04 LTS / 20.04 LTS:Linux 核心弱點 (USN-5017-1)

high Nessus Plugin ID 153129

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 主機上安裝的套件受到 USN-5017-1 公告中所提及的多個弱點影響。

- 藍牙核心規格 2.1 到 5.2 中的 Bluetooth LE 和 BR/EDR 安全配對可能允許附近的攔截式攻擊者透過公開金鑰的反映,識別配對期間 (在 Passkey 驗證程序中) 所使用的 Passkey 以及起始裝置的驗證證據,可能允許此攻擊者使用配對工作階段的正確 Passkey,完成與回應裝置的驗證配對。攻擊方法會以一次一位元的方式來判斷 Passkey 值。(CVE-2020-26558)

- BlueZ 中的不當存取控制可能會允許經驗證的使用者透過相鄰存取造成資訊洩漏。(CVE-2021-0129)

- Linux 核心 3.16 至 5.13.4 之前的 5.13.x 中的 fs/seq_file.c 未正確限制 seq 緩衝器配置,導致整數溢位、超出邊界寫入,以及無權限的使用者提升為 root 權限,亦稱 CID-8cae8cd89f05。(CVE-2021-33909)

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-5017-1

Plugin 詳細資訊

嚴重性: High

ID: 153129

檔案名稱: ubuntu_USN-5017-1.nasl

版本: 1.3

類型: local

代理程式: unix

已發布: 2021/9/8

已更新: 2021/9/9

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: 9.5

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-2021-33909

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

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p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-azure, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-azure-edge, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gcp-edge, 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-modules-extra-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-oracle-edge, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-virtual-hwe-18.04-edge, 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, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-5.4-headers-5.4.0-1052, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-5.4-tools-5.4.0-1052, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-edge, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-headers-5.4.0-1052, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-tools-5.4.0-1052, p-cpe:/a:canonical:ubuntu_linux:linux-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-raspi-5.4-headers-5.4.0-1041, p-cpe:/a:canonical:ubuntu_linux:linux-raspi-5.4-tools-5.4.0-1041, p-cpe:/a:canonical:ubuntu_linux:linux-raspi-headers-5.4.0-1041, p-cpe:/a:canonical:ubuntu_linux:linux-raspi-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-raspi-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-raspi-tools-5.4.0-1041, 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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, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oracle-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-tools-raspi-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-raspi-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-tools-raspi2-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-raspi2-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-snapdragon-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-snapdragon-hwe-18.04-edge, 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-udebs-generic, p-cpe:/a:canonical:ubuntu_linux:linux-udebs-generic-lpae, 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, p-cpe:/a:canonical:ubuntu_linux:md-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:md-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:message-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:mouse-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:mouse-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:multipath-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:multipath-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:nfs-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:nfs-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:nic-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:nic-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:nic-pcmcia-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:nic-shared-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:nic-shared-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:nic-usb-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:nic-usb-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:parport-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:parport-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:pata-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:pcmcia-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:pcmcia-storage-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:plip-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:plip-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:ppp-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:ppp-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:sata-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:sata-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:scsi-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:scsi-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:serial-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:storage-core-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:storage-core-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:usb-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:usb-modules-5.4.0-80-generic-lpae-di, p-cpe:/a:canonical:ubuntu_linux:virtio-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:vlan-modules-5.4.0-80-generic-di, p-cpe:/a:canonical:ubuntu_linux:vlan-modules-5.4.0-80-generic-lpae-di

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: 2021/7/20

弱點發布日期: 2021/5/24

參考資訊

CVE: CVE-2020-26558, CVE-2021-0129, CVE-2021-33909

USN: 5017-1

IAVA: 2021-A-0350