Ubuntu 16.04 LTS / 18.04 LTS：Linux 核心弱點 (USN-5164-1)
medium Nessus Plugin ID 155747
語系：
Synopsis
遠端 Ubuntu 主機缺少一個或多個安全性更新。描述
遠端 Ubuntu 16.04 LTS/18.04 LTS 主機上安裝的套件受到 USN-5164-1 公告中所提及的多個弱點影響。- 在 Linux 核心 5.13.4 以及之前的所有版本中，drivers/net/usb/hso.c 中的 hso_free_net_device 未檢查 NETREG_REGISTERED 狀態便呼叫 unregister_netdev，進而造成釋放後使用和雙重釋放。
(CVE-2021-37159)
- 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
Plugin 詳細資訊
嚴重性: Medium
ID: 155747
檔案名稱: ubuntu_USN-5164-1.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: 6.7
CVSS v2
風險因素: Medium
基本分數: 4.4
時間分數: 3.3
媒介: CVSS2#AV:L/AC:M/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-2021-37159
CVSS v3
風險因素: Medium
基本分數: 6.4
時間分數: 5.6
媒介: CVSS:3.0/AV:P/AC:H/PR:N/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: 2021/7/21
參考資訊
CVE: CVE-2021-37159, CVE-2021-3744, CVE-2021-3764
USN: 5164-1