CVE-2024-35962

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No network packet or remote peer data reaches this code path.\nAC:L - The attacker fully controls `tmp.size` and `optlen` and triggers the oversized `memcpy()` deterministically on every call \u2014 no race, no memory-layout luck, and no retry needed. The kernel-sockptr precondition is satisfied by any attached cgroup/setsockopt BPF program (even a no-op one, since `ctx.optlen` defaults to the original `optlen`), which is standard in container environments running Cilium and similar tooling on default `CONFIG_CGROUP_BPF=y` kernels.\nPR:L - `do_ipt_set_ctl()` gates on `ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)`, which any unprivileged user obtains with `unshare -Urn`; entering a new user/net namespace leaves cgroup membership intact so the BPF sockopt hook still applies. No real root in the initial namespace is required.\nUI:N - The attacker performs the entire sequence \u2014 socket creation, namespace setup, and the malformed setsockopt call \u2014 with no action by any other user or victim process.\nS:U - The out-of-bounds read occurs in kernel slab memory and its impact is confined to the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is an unbounded out-of-bounds read \u2014 up to `XT_MAX_TABLE_SIZE` (512 MB) copied from a \u2264PAGE_SIZE slab object into the netfilter table buffer, far beyond a \"few bytes\". With heap grooming to keep the resulting `ipt_entry` chain valid through `translate_table()`, the harvested kernel heap contents (pointers, keys, credentials, defeating KASLR) can be read back via `getsockopt(IPT_SO_GET_ENTRIES)`.\nI:N - The defect is purely an over-read; the destination buffer is correctly sized by `xt_alloc_table_info(tmp.size)`, so no memory outside an allocation is written and no control-flow or data corruption primitive is produced.\nA:H - A large attacker-chosen `tmp.size` makes the kernel `memcpy()` run hundreds of megabytes past the end of a small slab object, reliably hitting unmapped memory and causing a page fault in kernel context \u2014 an oops/panic \u2014 and the crash is trivially repeatable by any unprivileged local user."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/netfilter/arp_tables.c", 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No network packet or remote peer data reaches this code path.\nAC:L - The attacker fully controls `tmp.size` and `optlen` and triggers the oversized `memcpy()` deterministically on every call \u2014 no race, no memory-layout luck, and no retry needed. The kernel-sockptr precondition is satisfied by any attached cgroup/setsockopt BPF program (even a no-op one, since `ctx.optlen` defaults to the original `optlen`), which is standard in container environments running Cilium and similar tooling on default `CONFIG_CGROUP_BPF=y` kernels.\nPR:L - `do_ipt_set_ctl()` gates on `ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)`, which any unprivileged user obtains with `unshare -Urn`; entering a new user/net namespace leaves cgroup membership intact so the BPF sockopt hook still applies. No real root in the initial namespace is required.\nUI:N - The attacker performs the entire sequence \u2014 socket creation, namespace setup, and the malformed setsockopt call \u2014 with no action by any other user or victim process.\nS:U - The out-of-bounds read occurs in kernel slab memory and its impact is confined to the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is an unbounded out-of-bounds read \u2014 up to `XT_MAX_TABLE_SIZE` (512 MB) copied from a \u2264PAGE_SIZE slab object into the netfilter table buffer, far beyond a \"few bytes\". With heap grooming to keep the resulting `ipt_entry` chain valid through `translate_table()`, the harvested kernel heap contents (pointers, keys, credentials, defeating KASLR) can be read back via `getsockopt(IPT_SO_GET_ENTRIES)`.\nI:N - The defect is purely an over-read; the destination buffer is correctly sized by `xt_alloc_table_info(tmp.size)`, so no memory outside an allocation is written and no control-flow or data corruption primitive is produced.\nA:H - A large attacker-chosen `tmp.size` makes the kernel `memcpy()` run hundreds of megabytes past the end of a small slab object, reliably hitting unmapped memory and causing a page fault in kernel context \u2014 an oops/panic \u2014 and the crash is trivially repeatable by any unprivileged local user."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "0f038242b77ddfc505bf4163d4904c1abd2e74d6", 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GNU/Linux subsystem", "vendor": "Siemens", "versions": [{"lessThan": "V1.1.1", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6E1B2729-18BA-47C7-AE2D-971BC99C7D02", "versionEndExcluding": "5.15.156", "versionStartIncluding": "5.15.154", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A8CDEAF1-488F-498A-A833-FD0F2C78AD49", "versionEndExcluding": "6.1.87", "versionStartIncluding": "6.1.85", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ADF57D0A-A848-481F-9490-2616EBD7F6E2", "versionEndExcluding": "6.6.28", "versionStartIncluding": "6.6.26", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "41B95ABA-930C-43DE-9CA3-57E44AF4C78E", "versionEndExcluding": "6.8.7", "versionStartIncluding": "6.8.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.10.215:*:*:*:*:*:*:*", "matchCriteriaId": "6DEA5675-3527-4871-951D-0D346442BEFB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*", "matchCriteriaId": "52048DDA-FC5A-4363-95A0-A6357B4D7F8C", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: complete validation of user input\n\nIn my recent commit, I missed that do_replace() handlers\nuse copy_from_sockptr() (which I fixed), followed\nby unsafe copy_from_sockptr_offset() calls.\n\nIn all functions, we can perform the @optlen validation\nbefore even calling xt_alloc_table_info() with the following\ncheck:\n\nif ((u64)optlen < (u64)tmp.size + sizeof(tmp))\n return -EINVAL;"}, {"lang": "es", "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: netfilter: validaci\u00f3n completa de la entrada del usuario En mi confirmaci\u00f3n reciente, omit\u00ed que los controladores do_replace() usan copy_from_sockptr() (que arregl\u00e9), seguido de llamadas inseguras copy_from_sockptr_offset(). En todas las funciones, podemos realizar la validaci\u00f3n @optlen incluso antes de llamar a xt_alloc_table_info() con la siguiente comprobaci\u00f3n: if ((u64)optlen &lt; (u64)tmp.size + sizeof(tmp)) return -EINVAL;"}], "id": "CVE-2024-35962", "lastModified": "2026-10-15T01:18:13.690", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-35962", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:40:32.586631Z", "version": "2.0.3"}}]}, "published": "2024-05-20T10:15:11.327", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/562b7245131f6e9f1d280c8b5a8750f03edfc05c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65acf6e0501ac8880a4f73980d01b5d27648b956"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/89242d9584c342cb83311b598d9e6b82572eadf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/97dab36e57c64106e1c8ebd66cbf0d2d1e52d6b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c760089aa98289b4b88a7ff5a62dd92845adf223"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cf4bc359b76144a3dd55d7c09464ef4c5f2b2b05"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/562b7245131f6e9f1d280c8b5a8750f03edfc05c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65acf6e0501ac8880a4f73980d01b5d27648b956"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/89242d9584c342cb83311b598d9e6b82572eadf8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/97dab36e57c64106e1c8ebd66cbf0d2d1e52d6b7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c760089aa98289b4b88a7ff5a62dd92845adf223"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cf4bc359b76144a3dd55d7c09464ef4c5f2b2b05"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:5101", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.16.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5928", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.33.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-28T00:00:00Z"}, {"advisory": "RHSA-2024:5928", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.33.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-28T00:00:00Z"}, {"advisory": "RHSA-2024:5066", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.77.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-08-07T00:00:00Z"}, {"advisory": "RHSA-2024:5067", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.77.1.rt14.362.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-08-07T00:00:00Z"}], "bugzilla": {"description": "kernel: netfilter: complete validation of user input", "id": "2281916", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281916"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: complete validation of user input\nIn my recent commit, I missed that do_replace() handlers\nuse copy_from_sockptr() (which I fixed), followed\nby unsafe copy_from_sockptr_offset() calls.\nIn all functions, we can perform the @optlen validation\nbefore even calling xt_alloc_table_info() with the following\ncheck:\nif ((u64)optlen < (u64)tmp.size + sizeof(tmp))\nreturn -EINVAL;"], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-35962", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35962\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35962\nhttps://lore.kernel.org/linux-cve-announce/2024052020-CVE-2024-35962-e5ce@gregkh/T"], "threat_severity": "Moderate"}

{}