module
Netfilter nft_set_elem_init Heap Overflow Privilege Escalation
| Disclosed |
|---|
| 2022-02-07 |
Disclosed
2022-02-07
Description
An issue was discovered in the Linux kernel through 5.18.9.
A type confusion bug in nft_set_elem_init (leading to a buffer overflow)
could be used by a local attacker to escalate privileges.
The attacker can obtain root access, but must start with an unprivileged
user namespace to obtain CAP_NET_ADMIN access.
The issue exists in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.
A type confusion bug in nft_set_elem_init (leading to a buffer overflow)
could be used by a local attacker to escalate privileges.
The attacker can obtain root access, but must start with an unprivileged
user namespace to obtain CAP_NET_ADMIN access.
The issue exists in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.
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