fkie_cve-2024-50257
Vulnerability from fkie_nvd
Published
2024-11-09 11:15
Modified
2024-12-11 15:15
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: Fix use-after-free in get_info() ip6table_nat module unload has refcnt warning for UAF. call trace is: WARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80 Modules linked in: ip6table_nat(-) CPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:module_put+0x6f/0x80 Call Trace: <TASK> get_info+0x128/0x180 do_ip6t_get_ctl+0x6a/0x430 nf_getsockopt+0x46/0x80 ipv6_getsockopt+0xb9/0x100 rawv6_getsockopt+0x42/0x190 do_sock_getsockopt+0xaa/0x180 __sys_getsockopt+0x70/0xc0 __x64_sys_getsockopt+0x20/0x30 do_syscall_64+0xa2/0x1a0 entry_SYSCALL_64_after_hwframe+0x77/0x7f Concurrent execution of module unload and get_info() trigered the warning. The root cause is as follows: cpu0 cpu1 module_exit //mod->state = MODULE_STATE_GOING ip6table_nat_exit xt_unregister_template kfree(t) //removed from templ_list getinfo() t = xt_find_table_lock list_for_each_entry(tmpl, &xt_templates[af]...) if (strcmp(tmpl->name, name)) continue; //table not found try_module_get list_for_each_entry(t, &xt_net->tables[af]...) return t; //not get refcnt module_put(t->me) //uaf unregister_pernet_subsys //remove table from xt_net list While xt_table module was going away and has been removed from xt_templates list, we couldnt get refcnt of xt_table->me. Check module in xt_net->tables list re-traversal to fix it.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a1f088f9807f5166f58902d26246d0b88da03a8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba22ea01348384df19cc1fabc7964be6e7189749Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bab3bb35c03b263c486833d50d50c081d9e9832bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb7c388b5967946f097afdb759b7c860305f2d96Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f48d258f0ac540f00fa617dac496c4c18b5dc2faPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "27CA367E-22E6-43BC-9062-CFFE67D00C79",
                     versionEndExcluding: "5.15.171",
                     versionStartIncluding: "5.15",
                     vulnerable: true,
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                     vulnerable: true,
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               negate: false,
               operator: "OR",
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   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: Fix use-after-free in get_info()\n\nip6table_nat module unload has refcnt warning for UAF. call trace is:\n\nWARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80\nModules linked in: ip6table_nat(-)\nCPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:module_put+0x6f/0x80\nCall Trace:\n <TASK>\n get_info+0x128/0x180\n do_ip6t_get_ctl+0x6a/0x430\n nf_getsockopt+0x46/0x80\n ipv6_getsockopt+0xb9/0x100\n rawv6_getsockopt+0x42/0x190\n do_sock_getsockopt+0xaa/0x180\n __sys_getsockopt+0x70/0xc0\n __x64_sys_getsockopt+0x20/0x30\n do_syscall_64+0xa2/0x1a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nConcurrent execution of module unload and get_info() trigered the warning.\nThe root cause is as follows:\n\ncpu0\t\t\t\t      cpu1\nmodule_exit\n//mod->state = MODULE_STATE_GOING\n  ip6table_nat_exit\n    xt_unregister_template\n\tkfree(t)\n\t//removed from templ_list\n\t\t\t\t      getinfo()\n\t\t\t\t\t  t = xt_find_table_lock\n\t\t\t\t\t\tlist_for_each_entry(tmpl, &xt_templates[af]...)\n\t\t\t\t\t\t\tif (strcmp(tmpl->name, name))\n\t\t\t\t\t\t\t\tcontinue;  //table not found\n\t\t\t\t\t\t\ttry_module_get\n\t\t\t\t\t\tlist_for_each_entry(t, &xt_net->tables[af]...)\n\t\t\t\t\t\t\treturn t;  //not get refcnt\n\t\t\t\t\t  module_put(t->me) //uaf\n    unregister_pernet_subsys\n    //remove table from xt_net list\n\nWhile xt_table module was going away and has been removed from\nxt_templates list, we couldnt get refcnt of xt_table->me. Check\nmodule in xt_net->tables list re-traversal to fix it.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: Se corrige el problema use-after-free en la descarga del módulo ip6table_nat get_info() que tiene una advertencia refcnt para UAF. El seguimiento de llamadas es: ADVERTENCIA: CPU: 1 PID: 379 en kernel/module/main.c:853 module_put+0x6f/0x80 Módulos vinculados en: ip6table_nat(-) CPU: 1 UID: 0 PID: 379 Comm: ip6tables No contaminado 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:module_put+0x6f/0x80 Seguimiento de llamadas:  get_info+0x128/0x180 La ejecución simultánea de la descarga del módulo y get_info() activó la advertencia. La causa raíz es la siguiente: cpu0 cpu1 module_exit //mod-&gt;state = MODULE_STATE_GOING ip6table_nat_exit xt_unregister_template kfree(t) //eliminado de la lista de plantillas getinfo() t = xt_find_table_lock list_for_each_entry(tmpl, &amp;xt_templates[af]...) if (strcmp(tmpl-&gt;name, name)) continue; //tabla no encontrada try_module_get list_for_each_entry(t, &amp;xt_net-&gt;tables[af]...) return t; //no obtener refcnt module_put(t-&gt;me) //uaf unregister_pernet_subsys //eliminar tabla de la lista xt_net Mientras el módulo xt_table desaparecía y se eliminaba de la lista xt_templates, no pudimos obtener refcnt de xt_table-&gt;me. Verifique el módulo en el recorrido de lista xt_net-&gt;tables para solucionarlo.",
      },
   ],
   id: "CVE-2024-50257",
   lastModified: "2024-12-11T15:15:13.913",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 7.8,
               baseSeverity: "HIGH",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "LOW",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 1.8,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Primary",
         },
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 7.8,
               baseSeverity: "HIGH",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "LOW",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 1.8,
            impactScore: 5.9,
            source: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            type: "Secondary",
         },
      ],
   },
   published: "2024-11-09T11:15:11.340",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/6a1f088f9807f5166f58902d26246d0b88da03a8",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         url: "https://git.kernel.org/stable/c/ba22ea01348384df19cc1fabc7964be6e7189749",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         url: "https://git.kernel.org/stable/c/bab3bb35c03b263c486833d50d50c081d9e9832b",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
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         url: "https://git.kernel.org/stable/c/cb7c388b5967946f097afdb759b7c860305f2d96",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/f48d258f0ac540f00fa617dac496c4c18b5dc2fa",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-416",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
      {
         description: [
            {
               lang: "en",
               value: "CWE-416",
            },
         ],
         source: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
         type: "Secondary",
      },
   ],
}


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