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| author | Florian Westphal <fw@strlen.de> | 2026-03-10 02:28:29 +0300 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2026-03-13 17:31:14 +0300 |
| commit | f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05 (patch) | |
| tree | e1351acf4cc594a03f912f40dd7e0c1c2cb98fc2 /include | |
| parent | 5cb81eeda909dbb2def209dd10636b51549a3f8a (diff) | |
| download | linux-f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05.tar.xz | |
netfilter: conntrack: add missing netlink policy validations
Hyunwoo Kim reports out-of-bounds access in sctp and ctnetlink.
These attributes are used by the kernel without any validation.
Extend the netlink policies accordingly.
Quoting the reporter:
nlattr_to_sctp() assigns the user-supplied CTA_PROTOINFO_SCTP_STATE
value directly to ct->proto.sctp.state without checking that it is
within the valid range. [..]
and: ... with exp->dir = 100, the access at
ct->master->tuplehash[100] reads 5600 bytes past the start of a
320-byte nf_conn object, causing a slab-out-of-bounds read confirmed by
UBSAN.
Fixes: 076a0ca02644 ("netfilter: ctnetlink: add NAT support for expectations")
Fixes: a258860e01b8 ("netfilter: ctnetlink: add full support for SCTP to ctnetlink")
Reported-by: Hyunwoo Kim <imv4bel@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions