CVE-2024-26636

{"id": "CVE-2024-26636", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/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": 1.8}]}, "published": "2024-03-18T11:15:10.363", "references": [{"url": "https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": ["Mailing List"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": ["Mailing List"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: make llc_ui_sendmsg() more robust against bonding changes\n\nsyzbot was able to trick llc_ui_sendmsg(), allocating an skb with no\nheadroom, but subsequently trying to push 14 bytes of Ethernet header [1]\n\nLike some others, llc_ui_sendmsg() releases the socket lock before\ncalling sock_alloc_send_skb().\nThen it acquires it again, but does not redo all the sanity checks\nthat were performed.\n\nThis fix:\n\n- Uses LL_RESERVED_SPACE() to reserve space.\n- Check all conditions again after socket lock is held again.\n- Do not account Ethernet header for mtu limitation.\n\n[1]\n\nskbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0\n\n kernel BUG at net/core/skbuff.c:193 !\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\nModules linked in:\nCPU: 0 PID: 6875 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : skb_panic net/core/skbuff.c:189 [inline]\n pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\n lr : skb_panic net/core/skbuff.c:189 [inline]\n lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\nsp : ffff800096f97000\nx29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000\nx26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c9c36ff2\nx23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0\nx20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce\nx17: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001\nx14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000\nx11: 0000000000000001 x10: 0000000000ff0100 x9 : e28a51f1087e8400\nx8 : e28a51f1087e8400 x7 : ffff80008028f8d0 x6 : 0000000000000000\nx5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714\nx2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000089\nCall trace:\n skb_panic net/core/skbuff.c:189 [inline]\n skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\n skb_push+0xf0/0x108 net/core/skbuff.c:2451\n eth_header+0x44/0x1f8 net/ethernet/eth.c:83\n dev_hard_header include/linux/netdevice.h:3188 [inline]\n llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33\n llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85\n llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline]\n llc_sap_next_state net/llc/llc_sap.c:182 [inline]\n llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209\n llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270\n llc_ui_sendmsg+0x7bc/0xb1c net/llc/af_llc.c:997\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n sock_sendmsg+0x194/0x274 net/socket.c:767\n splice_to_socket+0x7cc/0xd58 fs/splice.c:881\n do_splice_from fs/splice.c:933 [inline]\n direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142\n splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088\n do_splice_direct+0x20c/0x348 fs/splice.c:1194\n do_sendfile+0x4bc/0xc70 fs/read_write.c:1254\n __do_sys_sendfile64 fs/read_write.c:1322 [inline]\n __se_sys_sendfile64 fs/read_write.c:1308 [inline]\n __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308\n __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]\n invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51\n el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136\n do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155\n el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678\n el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696\n el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595\nCode: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: llc: hacer que llc_ui_sendmsg() sea m\u00e1s robusto contra cambios de vinculaci\u00f3n syzbot pudo enga\u00f1ar a llc_ui_sendmsg(), asignando un skb sin espacio libre, pero posteriormente intent\u00f3 enviar 14 bytes de encabezado Ethernet [ 1] Como otros, llc_ui_sendmsg() libera el bloqueo del socket antes de llamar a sock_alloc_send_skb(). Luego lo adquiere nuevamente, pero no rehace todas las comprobaciones de cordura que se realizaron. Esta soluci\u00f3n: - Utiliza LL_RESERVED_SPACE() para reservar espacio. - Verifique todas las condiciones nuevamente despu\u00e9s de mantener nuevamente el bloqueo del casquillo. - No tenga en cuenta el encabezado Ethernet para la limitaci\u00f3n de mtu. [1] skbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0 ERROR del kernel en net/core/skbuff.c:193. Error interno: Ups - ERROR: 00000000f2000800 [#1] PREEMPT M\u00f3dulos SMP vinculados en: CPU: 0 PID: 6875 Comm: syz-executor.0 No contaminado 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0 Nombre del hardware : Google Google Compute Engine/Google Compute Engine, BIOS Google 17/11/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc: skb_panic net/core/skbuff.c:189 [en l\u00ednea] pc: skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 lr: skb_panic net/core/skbuff.c:189 [en l\u00ednea] lr: skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 sp: ffff800096f97000 x29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000 x26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c 9c36ff2 x23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0 x20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce x1 7: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001 x14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000ff0100 x9: e28a51f1087e8400 x8: e28a 51f1087e8400 x7: ffff80008028f8d0 x6: 0000000000000000 x5: 0000000000000001 x4: 0000000000000001 x3: ffff800082b78714 x2: 00000000000000 001 x1: 0000000100000000 x0: 0000000000000089 Rastreo de llamadas: skb_panic net/core /skbuff.c:189 [en l\u00ednea] skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 skb_push+0xf0/0x108 net/core/skbuff.c:2451 eth_header+0x44/0x1f8 net/ethernet/eth.c: 83 dev_hard_header include/linux/netdevice.h:3188 [en l\u00ednea] llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33 llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85 llc_exec_sap_trans_ acciones net/llc/llc_sap.c :153 [en l\u00ednea] llc_sap_next_state net/llc/llc_sap.c:182 [en l\u00ednea] llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209 llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270 llc_ ui_sendmsg+0x7bc/ 0xb1c net/llc/af_llc.c:997 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c:745 [en l\u00ednea] sock_sendmsg+0x194/0x274 net/socket.c:767 splice_to_socket+0x7cc/0xd58 fs /splice.c:881 do_splice_from fs/splice.c:933 [en l\u00ednea] direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088 do_splice_direct+0x20c/0x348 fs/splice. c:1194 do_sendfile+0x4bc/0xc70 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [en l\u00ednea] __se_sys_sendfile64 fs/read_write.c:1308 [en l\u00ednea] __arm64_sys_sendfile64+0x160/0x3b4 fs /read_write.c:1308 __invoke_syscall arch/arm64/kernel/syscall.c:37 [en l\u00ednea] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/ 0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+ 0x190/0x194 arch/arm64/kernel/entry.S:595 C\u00f3digo: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)"}], "lastModified": "2025-03-10T16:58:35.783", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9F7D87E5-6751-4F81-9988-9AD4C1201206", "versionEndExcluding": "4.19.307", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "319545F3-D56C-4751-BEBF-0505478BBAE8", "versionEndExcluding": "5.4.269", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5CB4CA6-A9A0-4AFD-9102-8CF94D708170", "versionEndExcluding": "5.10.210", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D0465BB-4053-4E15-9137-6696EBAE90FD", "versionEndExcluding": "5.15.149", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "32F0FEB3-5FE1-4400-A56D-886F09BE872E", "versionEndExcluding": "6.1.76", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "87C718CB-AE3D-4B07-B4D9-BFF64183C468", "versionEndExcluding": "6.6.15", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58FD5308-148A-40D3-B36A-0CA6B434A8BF", "versionEndExcluding": "6.7.3", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}