Описание
The nft_flush_table function in net/netfilter/nf_tables_api.c in the Linux kernel before 3.18.5 mishandles the interaction between cross-chain jumps and ruleset flushes, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability.
A flaw was found in the way the nft_flush_table() function of the Linux kernel's netfilter tables implementation flushed rules that were referencing deleted chains. A local user who has the CAP_NET_ADMIN capability could use this flaw to crash the system.
Отчет
This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 and 6 (as they did not include support for netfilter tables API). This issue affects the versions of the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG 2. Future kernel updates for the respective releases may address this issue.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2015:1139 | 23.06.2015 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2015:1137 | 23.06.2015 |
| Red Hat Enterprise MRG 2 | kernel-rt | Fixed | RHSA-2015:1138 | 23.06.2015 |
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Дополнительная информация
Статус:
2.4 Low
CVSS2
Связанные уязвимости
The nft_flush_table function in net/netfilter/nf_tables_api.c in the Linux kernel before 3.18.5 mishandles the interaction between cross-chain jumps and ruleset flushes, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability.
The nft_flush_table function in net/netfilter/nf_tables_api.c in the Linux kernel before 3.18.5 mishandles the interaction between cross-chain jumps and ruleset flushes, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability.
The nft_flush_table function in net/netfilter/nf_tables_api.c in the L ...
The nft_flush_table function in net/netfilter/nf_tables_api.c in the Linux kernel before 3.18.5 mishandles the interaction between cross-chain jumps and ruleset flushes, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability.
ELSA-2015-1137: kernel security and bug fix update (IMPORTANT)
2.4 Low
CVSS2