ghsa-fcg7-9x44-gx43
Vulnerability from github
Published
2023-07-21 21:30
Modified
2024-08-22 21:31
Details

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.

If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.

We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.

Show details on source website


{
   affected: [],
   aliases: [
      "CVE-2023-3776",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-416",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2023-07-21T21:15:11Z",
      severity: "HIGH",
   },
   details: "A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.\n\nIf tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\n\nWe recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.\n\n",
   id: "GHSA-fcg7-9x44-gx43",
   modified: "2024-08-22T21:31:27Z",
   published: "2023-07-21T21:30:33Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2023-3776",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f",
      },
      {
         type: "WEB",
         url: "https://kernel.dance/0323bce598eea038714f941ce2b22541c46d488f",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html",
      },
      {
         type: "WEB",
         url: "https://security.netapp.com/advisory/ntap-20240202-0003",
      },
      {
         type: "WEB",
         url: "https://www.debian.org/security/2023/dsa-5480",
      },
      {
         type: "WEB",
         url: "https://www.debian.org/security/2023/dsa-5492",
      },
      {
         type: "WEB",
         url: "http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html",
      },
      {
         type: "WEB",
         url: "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
         type: "CVSS_V3",
      },
   ],
}


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