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CVE-2024-53179

Estado: ModificadaAlta (7.8)—

In 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:

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.

Detalles técnicos trazas, registros y código del informe original
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*

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de use-after-free (CWE-416) en kernel Linux que requiere acceso local (AV:L) con privilegios limitados (PR:L). La carrera de condiciones permite acceso a memoria después de liberación, permitiendo escalada de privilegios y ejecución de código en contexto elevado.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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      "value": "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->auth_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->auth_key.response by\nchecking whether @ses->ses_status is SES_GOOD or SES_EXITING with\n@ses->ses_lock held.  After commit 24a9799aa8ef (\"smb: client: fix UAF\nin smb2_reconnect_server()\"), we made sure to call ->logoff() only\nwhen @ses was known to be good (e.g. valid ->auth_key.response), so\nit's safe to access signing key when @ses->ses_status == SES_EXITING."
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