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The latter uses data from the destroyed set which\nthus leads use after free. The patch contains the following parts:\n\n- When destroying all sets, first remove the garbage collectors, then wait\n if needed and then destroy the sets.\n- Fix the badly ordered \"wait then remove gc\" for the destroy a single set\n case.\n- Fix the missing rcu locking in the list:set type in the userspace test\n case.\n- Use proper RCU list handlings in the list:set type.\n\nThe patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/ipset/ip_set_core.c", "net/netfilter/ipset/ip_set_list_set.c"], "versions": [{"version": "c7f2733e5011bfd136f1ca93497394d43aa76225", "lessThan": "c0761d1f1ce1d5b85b5e82bbb714df12de1aa8c3", "status": "affected", "versionType": "git"}, {"version": "a24d5f2ac8ef702a58e55ec276aad29b4bd97e05", "lessThan": 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there is a race condition between namespace cleanup\nin ipset and the garbage collection of the list:set type. The namespace\ncleanup can destroy the list:set type of sets while the gc of the set type is\nwaiting to run in rcu cleanup. The latter uses data from the destroyed set which\nthus leads use after free. The patch contains the following parts:\n\n- When destroying all sets, first remove the garbage collectors, then wait\n if needed and then destroy the sets.\n- Fix the badly ordered \"wait then remove gc\" for the destroy a single set\n case.\n- Fix the missing rcu locking in the list:set type in the userspace test\n case.\n- Use proper RCU list handlings in the list:set type.\n\nThe patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc)."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T09:07:27.134Z"}}}, "cveMetadata": {"cveId": "CVE-2024-39503", "state": "PUBLISHED", "dateUpdated": "2024-12-19T09:07:27.134Z", "dateReserved": "2024-06-25T14:23:23.752Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-07-12T12:20:36.299Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: Fix race between namespace cleanup and gc in the list:set type\n\nLion Ackermann reported that there is a race condition between namespace cleanup\nin ipset and the garbage collection of the list:set type. The namespace\ncleanup can destroy the list:set type of sets while the gc of the set type is\nwaiting to run in rcu cleanup. The latter uses data from the destroyed set which\nthus leads use after free. The patch contains the following parts:\n\n- When destroying all sets, first remove the garbage collectors, then wait\n if needed and then destroy the sets.\n- Fix the badly ordered \"wait then remove gc\" for the destroy a single set\n case.\n- Fix the missing rcu locking in the list:set type in the userspace test\n case.\n- Use proper RCU list handlings in the list:set type.\n\nThe patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc)."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: ipset: corrige la ejecuci\u00f3n entre la limpieza del espacio de nombres y gc en el tipo list:set Lion Ackermann inform\u00f3 que existe una condici\u00f3n de ejecuci\u00f3n entre la limpieza del espacio de nombres en ipset y la recolecci\u00f3n de basura de la lista : establecer tipo. La limpieza del espacio de nombres puede destruir el tipo list:set de conjuntos mientras el gc del tipo set espera ejecutarse en la limpieza de rcu. Este \u00faltimo utiliza datos del conjunto destruido, lo que lleva a un uso posterior al gratuito. El parche contiene las siguientes partes: - Al destruir todos los conjuntos, primero retire los recolectores de basura, luego espere si es necesario y luego destruya los conjuntos. - Se corrigi\u00f3 el error \"esperar y luego eliminar gc\" mal ordenado para destruir un solo caso de conjunto. - Corrija el bloqueo de rcu que falta en la lista: establezca el tipo en el caso de prueba del espacio de usuario. - Utilice el manejo adecuado de la lista de RCU en el tipo list:set. El parche depende de c1193d9bbbd3 (netfilter: ipset: Agregar lista vaciada a cancel_gc)."}], "id": "CVE-2024-39503", "lastModified": "2024-11-21T09:27:50.443", "metrics": {}, "published": "2024-07-12T13:15:12.757", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f1bb77c6d837c9513943bc7c08f04c5cc5c6568"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2ba35b37f780c6410bb4bba9c3072596d8576702"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/390b353d1a1da3e9c6c0fd14fe650d69063c95d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e7aaa6b82d63e8ddcbfb56b4fd3d014ca586f10"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90ae20d47de602198eb69e6cd7a3db3420abfc08"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93b53c202b51a69e42ca57f5a183f7e008e19f83"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c0761d1f1ce1d5b85b5e82bbb714df12de1aa8c3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/0f1bb77c6d837c9513943bc7c08f04c5cc5c6568"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/2ba35b37f780c6410bb4bba9c3072596d8576702"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/390b353d1a1da3e9c6c0fd14fe650d69063c95d6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/4e7aaa6b82d63e8ddcbfb56b4fd3d014ca586f10"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/90ae20d47de602198eb69e6cd7a3db3420abfc08"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/93b53c202b51a69e42ca57f5a183f7e008e19f83"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/c0761d1f1ce1d5b85b5e82bbb714df12de1aa8c3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"affected_release": [{"advisory": "RHSA-2024:8870", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.27.1.rt7.368.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-11-05T00:00:00Z"}, {"advisory": "RHSA-2024:8856", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.27.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-11-05T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "kernel: netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type", "id": "2297475", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2297475"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: ipset: Fix race between namespace cleanup and gc in the list:set type\nLion Ackermann reported that there is a race condition between namespace cleanup\nin ipset and the garbage collection of the list:set type. The namespace\ncleanup can destroy the list:set type of sets while the gc of the set type is\nwaiting to run in rcu cleanup. The latter uses data from the destroyed set which\nthus leads use after free. The patch contains the following parts:\n- When destroying all sets, first remove the garbage collectors, then wait\nif needed and then destroy the sets.\n- Fix the badly ordered \"wait then remove gc\" for the destroy a single set\ncase.\n- Fix the missing rcu locking in the list:set type in the userspace test\ncase.\n- Use proper RCU list handlings in the list:set type.\nThe patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc)."], "mitigation": {"lang": "en:us", "value": "1. This flaw can be mitigated by preventing the affected netfilter (nf_tables) kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.\n2. If the module cannot be disabled, on non-containerized deployments of Red Hat Enterprise Linux, the mitigation is to disable user namespaces:\n```\n# echo \"user.max_user_namespaces=0\" > /etc/sysctl.d/userns.conf\n# sysctl -p /etc/sysctl.d/userns.conf\n```\nOn containerized deployments, such as Red Hat OpenShift Container Platform, do not use the second mitigation (disabling user namespaces) as the functionality is needed to be enabled. The first mitigation (blacklisting nf_tables) is still viable for containerized deployments, providing the environment is not using netfilter."}, "name": "CVE-2024-39503", "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:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-39503\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-39503\nhttps://lore.kernel.org/linux-cve-announce/2024071204-CVE-2024-39503-e604@gregkh/T"], "statement": "Only local users with `CAP_NET_ADMIN` capability (or root) can trigger this issue. \nOn Red Hat Enterprise Linux, local unprivileged users can exploit unprivileged user namespaces (CONFIG_USER_NS) to grant themselves this capability.\nThe OpenShift Container Platform (OCP) control planes or master machines are based on Red Hat Enterprise Linux CoreOS (RHCOS) that consists primarily of RHEL components, hence is also affected by this kernel vulnerability. Like it is mentioned earlier, the successful exploit needs necessary privileges (CAP_NET_ADMIN) and direct, local access . Local user in RHCOS is already a root with full permissions, hence existence of this vulnerability does not bring any value from the potential attacker perspective. From the OpenShift containers perspective, this vulnerability cannot be exploited as in OpenShift the cluster processes on the node are namespaced, which means that switching in the running OpenShift container the namespace will not bring necessary capabilities.\nThis means that for OpenShift, the impact of this vulnerability is Low.\nSimilar to CVE-2023-32233 vulnerability has been explained in the following blog post as an example of \"Container escape vulnerability\":\nhttps://www.redhat.com/en/blog/containers-vulnerability-risk-assessment", "threat_severity": "Moderate"}

{}