ghsa-rvwv-8rrq-q84r
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
tipc: force a dst refcount before doing decryption
As it says in commit 3bc07321ccc2 ("xfrm: Force a dst refcount before entering the xfrm type handlers"):
"Crypto requests might return asynchronous. In this case we leave the rcu protected region, so force a refcount on the skb's destination entry before we enter the xfrm type input/output handlers."
On TIPC decryption path it has the same problem, and skb_dst_force() should be called before doing decryption to avoid a possible crash.
Shuang reported this issue when this warning is triggered:
[] WARNING: include/net/dst.h:337 tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Kdump: loaded Tainted: G W --------- - - 4.18.0-496.el8.x86_64+debug [] Workqueue: crypto cryptd_queue_worker [] RIP: 0010:tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Call Trace: [] tipc_sk_mcast_rcv+0x548/0xea0 [tipc] [] tipc_rcv+0xcf5/0x1060 [tipc] [] tipc_aead_decrypt_done+0x215/0x2e0 [tipc] [] cryptd_aead_crypt+0xdb/0x190 [] cryptd_queue_worker+0xed/0x190 [] process_one_work+0x93d/0x17e0
{
"affected": [],
"aliases": [
"CVE-2024-40983"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-12T13:15:19Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: force a dst refcount before doing decryption\n\nAs it says in commit 3bc07321ccc2 (\"xfrm: Force a dst refcount before\nentering the xfrm type handlers\"):\n\n\"Crypto requests might return asynchronous. In this case we leave the\n rcu protected region, so force a refcount on the skb\u0027s destination\n entry before we enter the xfrm type input/output handlers.\"\n\nOn TIPC decryption path it has the same problem, and skb_dst_force()\nshould be called before doing decryption to avoid a possible crash.\n\nShuang reported this issue when this warning is triggered:\n\n [] WARNING: include/net/dst.h:337 tipc_sk_rcv+0x1055/0x1ea0 [tipc]\n [] Kdump: loaded Tainted: G W --------- - - 4.18.0-496.el8.x86_64+debug\n [] Workqueue: crypto cryptd_queue_worker\n [] RIP: 0010:tipc_sk_rcv+0x1055/0x1ea0 [tipc]\n [] Call Trace:\n [] tipc_sk_mcast_rcv+0x548/0xea0 [tipc]\n [] tipc_rcv+0xcf5/0x1060 [tipc]\n [] tipc_aead_decrypt_done+0x215/0x2e0 [tipc]\n [] cryptd_aead_crypt+0xdb/0x190\n [] cryptd_queue_worker+0xed/0x190\n [] process_one_work+0x93d/0x17e0",
"id": "GHSA-rvwv-8rrq-q84r",
"modified": "2024-07-12T15:31:29Z",
"published": "2024-07-12T15:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40983"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2ebe8f840c7450ecbfca9d18ac92e9ce9155e269"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3eb1b39627892c4e26cb0162b75725aa5fcc60c8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/623c90d86a61e3780f682b32928af469c66ec4c2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6808b41371670c51feea14f63ade211e78100930"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/692803b39a36e63ac73208e0a3769ae6a2f9bc76"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b57a4a2dc8746cea58a922ebe31b6aa629d69d93"
}
],
"schema_version": "1.4.0",
"severity": []
}
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