| Titre | Kernel: use-after-free in route4_change() in net/sched/cls_route.c |
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| Description | A flaw was found in the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem in the way it handled changing of classification filters, leading to a use-after-free condition. This flaw allows unprivileged local users to escalate their privileges on the system.
This flaw is rated as having Moderate impact (Red Hat Enterprise Linux 7 and lower) because of the need to have CAP_NET_ADMIN privileges and that Red Hat Enterprise Linux 7 disabled unprivileged user/network namespaces by default. This flaw is rated as having Important impact (Red Hat Enterprise Linux 8) because Red Hat Enterprise Linux 8 enabled unprivileged user/network namespaces by default which can be used to gain CAP_NET_ADMIN privileges in corresponding user namespace even for otherwise unprivileged local user and thus exercise this vulnerability.
CVE-2021-3715 / CWE-416
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| La source | ⚠️ https://access.redhat.com/security/cve/CVE-2021-3715 |
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| Utilisateur | misc (UID 3) |
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| Soumission | 18/10/2021 08:34 (il y a 5 ans) |
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| Modérer | 18/10/2021 08:38 (4 minutes later) |
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| Statut | Accepté |
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| Entrée VulDB | 184524 [Linux Kernel Traffic Control Networking Subsystem net/sched/cls_route.c route4_change buffer overflow] |
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| Points | 20 |
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