Ubuntu 20.04 LTS/21.04:Linux 核心弱點 (USN-5161-1)

high Nessus Plugin ID 155752

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 / 21.04 主機上安裝的多個套件受到 USN-5161-1 公告中所提及的多個弱點影響。

- 在 Linux 核心 5.14.6 之前版本的 drivers/soc/aspeed/aspeed-lpc-ctrl.c 的 aspeed_lpc_ctrl_mmap 中發現一個問題。擁有 Aspeed LPC 控制介面存取權限的本機攻擊者可覆寫核心中的記憶體,並可能執行權限,即 CID-b49a0e69a7b1。這是因為特定比較使用的值並非記憶體大小。(CVE-2021-42252)

- 在 Linux 核心 v5.14-rc1 之前版本中發現一個缺陷。缺少對傳入 SCTP 封包的大小驗證,可能允許核心讀取未初始化的記憶體。(CVE-2021-3655)

- 在 Linux 核心的 drivers/crypto/ccp/ccp-ops.c 中的 ccp_run_aes_gcm_cmd() 函式有一個記憶體洩漏弱點,攻擊者藉此可導致拒絕服務 (記憶體消耗)。
此弱點與舊版 CVE-2019-18808 類似。(CVE-2021-3744)

- 在 Linux 核心的 ccp_run_aes_gcm_cmd() 函式中發現記憶體洩漏弱點,攻擊者可藉此造成拒絕服務。此弱點與早先的 CVE-2019-18808 類似。此弱點對系統可用性威脅最大。(CVE-2021-3764)

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作出判斷。

解決方案

更新受影響的套件。

另請參閱

https://ubuntu.com/security/notices/USN-5161-1

Plugin 詳細資訊

嚴重性: High

ID: 155752

檔案名稱: ubuntu_USN-5161-1.nasl

版本: 1.5

類型: local

代理程式: unix

已發布: 2021/12/1

已更新: 2023/3/21

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

風險資訊

VPR

風險因素: Medium

分數: 5.9

CVSS v2

風險因素: Medium

基本分數: 4.6

時間分數: 3.4

媒介: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

時間媒介: CVSS2#E:U/RL:OF/RC:C

CVSS 評分資料來源: CVE-2021-42252

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: CVSS:3.0/E:U/RL:O/RC:C

弱點資訊

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

可輕鬆利用: No known exploits are available

修補程式發佈日期: 2021/11/30

弱點發布日期: 2021/8/5

參考資訊

CVE: CVE-2021-3655, CVE-2021-3744, CVE-2021-42252, CVE-2021-3764

USN: 5161-1