CVE-2024-47692

{"id": "CVE-2024-47692", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2024-10-21T12:15:05.953", "references": [{"url": "https://git.kernel.org/stable/c/0f1d007bbea38a61cf9c5392708dc70ae9d84a3d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1ff8be8d008b9ddc8e7043fbddd37d5d451b271b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/22451a16b7ab7debefce660672566be887db1637", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/318f70857caab3da9a6ada9bc8c1f4f7591b695e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6d07040ae5c2214e39c7444d898039c9e655a79a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/766d5fbd78f7a52b3888449a0358760477b74602", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/84a563d136faf514fdad1ade28d7a142fd313cb8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b7b7a8df41ef18862dd6b22289fb46c2c12398af", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: return -EINVAL when namelen is 0\n\nWhen we have a corrupted main.sqlite in /var/lib/nfs/nfsdcld/, it may\nresult in namelen being 0, which will cause memdup_user() to return\nZERO_SIZE_PTR.\nWhen we access the name.data that has been assigned the value of\nZERO_SIZE_PTR in nfs4_client_to_reclaim(), null pointer dereference is\ntriggered.\n\n[ T1205] ==================================================================\n[ T1205] BUG: KASAN: null-ptr-deref in nfs4_client_to_reclaim+0xe9/0x260\n[ T1205] Read of size 1 at addr 0000000000000010 by task nfsdcld/1205\n[ T1205]\n[ T1205] CPU: 11 PID: 1205 Comm: nfsdcld Not tainted 5.10.0-00003-g2c1423731b8d #406\n[ T1205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014\n[ T1205] Call Trace:\n[ T1205] dump_stack+0x9a/0xd0\n[ T1205] ? nfs4_client_to_reclaim+0xe9/0x260\n[ T1205] __kasan_report.cold+0x34/0x84\n[ T1205] ? nfs4_client_to_reclaim+0xe9/0x260\n[ T1205] kasan_report+0x3a/0x50\n[ T1205] nfs4_client_to_reclaim+0xe9/0x260\n[ T1205] ? nfsd4_release_lockowner+0x410/0x410\n[ T1205] cld_pipe_downcall+0x5ca/0x760\n[ T1205] ? nfsd4_cld_tracking_exit+0x1d0/0x1d0\n[ T1205] ? down_write_killable_nested+0x170/0x170\n[ T1205] ? avc_policy_seqno+0x28/0x40\n[ T1205] ? selinux_file_permission+0x1b4/0x1e0\n[ T1205] rpc_pipe_write+0x84/0xb0\n[ T1205] vfs_write+0x143/0x520\n[ T1205] ksys_write+0xc9/0x170\n[ T1205] ? __ia32_sys_read+0x50/0x50\n[ T1205] ? ktime_get_coarse_real_ts64+0xfe/0x110\n[ T1205] ? ktime_get_coarse_real_ts64+0xa2/0x110\n[ T1205] do_syscall_64+0x33/0x40\n[ T1205] entry_SYSCALL_64_after_hwframe+0x67/0xd1\n[ T1205] RIP: 0033:0x7fdbdb761bc7\n[ T1205] Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 514\n[ T1205] RSP: 002b:00007fff8c4b7248 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\n[ T1205] RAX: ffffffffffffffda RBX: 000000000000042b RCX: 00007fdbdb761bc7\n[ T1205] RDX: 000000000000042b RSI: 00007fff8c4b75f0 RDI: 0000000000000008\n[ T1205] RBP: 00007fdbdb761bb0 R08: 0000000000000000 R09: 0000000000000001\n[ T1205] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000042b\n[ T1205] R13: 0000000000000008 R14: 00007fff8c4b75f0 R15: 0000000000000000\n[ T1205] ==================================================================\n\nFix it by checking namelen."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: devuelve -EINVAL cuando namelen es 0 Cuando tenemos un main.sqlite da\u00f1ado en /var/lib/nfs/nfsdcld/, puede resultar en que namelen sea 0, lo que har\u00e1 que memdup_user() devuelva ZERO_SIZE_PTR. Cuando accedemos al name.data al que se le ha asignado el valor ZERO_SIZE_PTR en nfs4_client_to_reclaim(), se activa la desreferencia de puntero nulo. [ T1205] ========================================================================= [ T1205] ERROR: KASAN: null-ptr-deref en nfs4_client_to_reclaim+0xe9/0x260 [ T1205] Lectura de tama\u00f1o 1 en la direcci\u00f3n 0000000000000010 por la tarea nfsdcld/1205 [ T1205] [ T1205] CPU: 11 PID: 1205 Comm: nfsdcld No contaminado 5.10.0-00003-g2c1423731b8d #406 [ T1205] Hardware nombre: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 01/04/2014 [ T1205] Seguimiento de llamadas: [ T1205] dump_stack+0x9a/0xd0 [ T1205] ? nfs4_client_to_reclaim+0xe9/0x260 [ T1205] __kasan_report.cold+0x34/0x84 [ T1205] ? nfs4_client_to_reclaim+0xe9/0x260 [ T1205] kasan_report+0x3a/0x50 [ T1205] nfs4_client_to_reclaim+0xe9/0x260 [ T1205] ? nfsd4_release_lockowner+0x410/0x410 [ T1205] cld_pipe_downcall+0x5ca/0x760 [ T1205] ? nfsd4_cld_tracking_exit+0x1d0/0x1d0 [ T1205] ? down_write_killable_nested+0x170/0x170 [ T1205] ? avc_policy_seqno+0x28/0x40 [ T1205] ? ktime_get_coarse_real_ts64+0xfe/0x110 [ T1205] ? ktime_get_coarse_real_ts64+0xa2/0x110 [ T1205] do_syscall_64+0x33/0x40 [ T1205] entry_SYSCALL_64_after_hwframe+0x67/0xd1 [ T1205] RIP: 0033:0x7fdbdb761bc7 [ T1205] C\u00f3digo: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 &lt;48&gt; 3d 00 f0 ff ff 77 514 [ T1205] RSP: 002b:00007fff8c4b7248 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ T1205] RAX: ffffffffffffffda RBX: 000000000000042b RCX: 00007fdbdb761bc7 [ T1205] RDX: 000000000000042b RSI: 00007fff8c4b75f0 RDI: 000000000000008 [ T1205] RBP: 00007fdbdb761bb0 R08: 000000000000000 R09: 00000000000000001 [ T1205] R10: 00000000000000000 R11: 00000000000000246 R12: 0000000000000042b [ T1205] R13: 0000000000000008 R14: 00007fff8c4b75f0 R15: 0000000000000000 [ T1205] ========================================================================= Arr\u00e9glelo comprobando namelen."}], "lastModified": "2024-11-08T16:15:25.200", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "020DEDF4-83FD-45FA-932B-E5711870FC65", "versionEndExcluding": "5.10.227", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C", "versionEndExcluding": "5.15.168", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE", "versionEndExcluding": "6.1.113", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D448821D-C085-4CAF-88FA-2DDE7BE21976", "versionEndExcluding": "6.6.54", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CE94BB8D-B0AB-4563-9ED7-A12122B56EBE", "versionEndExcluding": "6.10.13", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AB755D26-97F4-43B6-8604-CD076811E181", "versionEndExcluding": "6.11.2", "versionStartIncluding": "6.11"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}