ghsa-22mj-9hjg-cp82
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
tap: add missing verification for short frame
The cited commit missed to check against the validity of the frame length in the tap_get_user_xdp() path, which could cause a corrupted skb to be sent downstack. Even before the skb is transmitted, the tap_get_user_xdp()-->skb_set_network_header() may assume the size is more than ETH_HLEN. Once transmitted, this could either cause out-of-bound access beyond the actual length, or confuse the underlayer with incorrect or inconsistent header length in the skb metadata.
In the alternative path, tap_get_user() already prohibits short frame which has the length less than Ethernet header size from being transmitted.
This is to drop any frame shorter than the Ethernet header size just like how tap_get_user() does.
CVE: CVE-2024-41090
{
"affected": [],
"aliases": [
"CVE-2024-41090"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-29T07:15:07Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntap: add missing verification for short frame\n\nThe cited commit missed to check against the validity of the frame length\nin the tap_get_user_xdp() path, which could cause a corrupted skb to be\nsent downstack. Even before the skb is transmitted, the\ntap_get_user_xdp()--\u003eskb_set_network_header() may assume the size is more\nthan ETH_HLEN. Once transmitted, this could either cause out-of-bound\naccess beyond the actual length, or confuse the underlayer with incorrect\nor inconsistent header length in the skb metadata.\n\nIn the alternative path, tap_get_user() already prohibits short frame which\nhas the length less than Ethernet header size from being transmitted.\n\nThis is to drop any frame shorter than the Ethernet header size just like\nhow tap_get_user() does.\n\nCVE: CVE-2024-41090",
"id": "GHSA-22mj-9hjg-cp82",
"modified": "2024-07-29T09:36:14Z",
"published": "2024-07-29T09:36:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41090"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/73d462a38d5f782b7c872fe9ae8393d9ef5483da"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7431144b406ae82807eb87d8c98e518475b0450f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8be915fc5ff9a5e296f6538be12ea75a1a93bdea"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aa6a5704cab861c9b2ae9f475076e1881e87f5aa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e1a786b9bbb767fd1c922d424aaa8078cc542309"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e5e5e63c506b93b89b01f522b6a7343585f784e6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ed7f2afdd0e043a397677e597ced0830b83ba0b3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ee93e6da30377cf2a75e16cd32bb9fcd86a61c46"
}
],
"schema_version": "1.4.0",
"severity": []
}