| 제목 | Kernel: use-after-free in route4_change() in net/sched/cls_route.c |
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| 설명 | 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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| 원천 | ⚠️ https://access.redhat.com/security/cve/CVE-2021-3715 |
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| 사용자 | misc (UID 3) |
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| 제출 | 2021. 10. 18. AM 08:34 (5 연령 ago) |
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| 모더레이션 | 2021. 10. 18. AM 08:38 (4 minutes later) |
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| 상태 | 수락 |
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| VulDB 항목 | 184524 [Linux Kernel Traffic Control Networking Subsystem net/sched/cls_route.c route4_change 메모리 손상] |
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| 포인트들 | 20 |
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