GHSA-2QFQ-Q4FV-FP24
Vulnerability from github – Published: 2024-12-27 15:31 – Updated: 2025-01-14 18:31In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix use-after-free of signing key
Customers have reported use-after-free in @ses->auth_key.response with SMB2.1 + sign mounts which occurs due to following race:
task A task B cifs_mount() dfs_mount_share() get_session() cifs_mount_get_session() cifs_send_recv() cifs_get_smb_ses() compound_send_recv() cifs_setup_session() smb2_setup_request() kfree_sensitive() smb2_calc_signature() crypto_shash_setkey() UAF
Fix this by ensuring that we have a valid @ses->auth_key.response by checking whether @ses->ses_status is SES_GOOD or SES_EXITING with @ses->ses_lock held. After commit 24a9799aa8ef ("smb: client: fix UAF in smb2_reconnect_server()"), we made sure to call ->logoff() only when @ses was known to be good (e.g. valid ->auth_key.response), so it's safe to access signing key when @ses->ses_status == SES_EXITING.
{
"affected": [],
"aliases": [
"CVE-2024-53179"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-27T14:15:25Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free of signing key\n\nCustomers have reported use-after-free in @ses-\u003eauth_key.response with\nSMB2.1 + sign mounts which occurs due to following race:\n\ntask A task B\ncifs_mount()\n dfs_mount_share()\n get_session()\n cifs_mount_get_session() cifs_send_recv()\n cifs_get_smb_ses() compound_send_recv()\n cifs_setup_session() smb2_setup_request()\n kfree_sensitive() smb2_calc_signature()\n crypto_shash_setkey() *UAF*\n\nFix this by ensuring that we have a valid @ses-\u003eauth_key.response by\nchecking whether @ses-\u003eses_status is SES_GOOD or SES_EXITING with\n@ses-\u003eses_lock held. After commit 24a9799aa8ef (\"smb: client: fix UAF\nin smb2_reconnect_server()\"), we made sure to call -\u003elogoff() only\nwhen @ses was known to be good (e.g. valid -\u003eauth_key.response), so\nit\u0027s safe to access signing key when @ses-\u003eses_status == SES_EXITING.",
"id": "GHSA-2qfq-q4fv-fp24",
"modified": "2025-01-14T18:31:53Z",
"published": "2024-12-27T15:31:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53179"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0e2b654a3848bf9da3b0d54c1ccf3f1b8c635591"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/343d7fe6df9e247671440a932b6a73af4fa86d95"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/39619c65ab4bbb3e78c818f537687653e112764d"
}
],
"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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