Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_nat: reject unsupported target families xt_nat SNAT and DNAT target handlers assume IP-family conntrack state is present and can dereference a NULL pointer when instantiated from an unsupported family through nft_compat. A bridge-family compat rule can therefore trigger a NULL-dereference in nf_nat_setup_info(). Reject non-IP families in xt_nat_checkentry() so unsupported targets cannot be installed. Keep NFPROTO_INET allowed for valid inet NAT compat users and leave the runtime fast path unchanged. [ The crash was fixed via 9dbba7e694ec ("netfilter: nft_compat: ebtables emulation must reject non-bridge targets"), so this patch is no longer critical. Nevertheless, NAT is only relevant for ipv4/ipv6, so this extra family check is a good idea in any case. ]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c7232c9979cba684c50b64c513c4a83c9aa70563 before 49abe564391411057a26a9a943c8e17867c3b9b4; affected c7232c9979cba684c50b64c513c4a83c9aa70563 before 0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82; affected c7232c9979cba684c50b64c513c4a83c9aa70563 before 4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777; affected c7232c9979cba684c50b64c513c4a83c9aa70563 before a842dab87cab29f2a5798a47b2dc5e6a449950bf; affected c7232c9979cba684c50b64c513c4a83c9aa70563 before e35c048d7511e9d4c2a537b8a231c49606e97c16; affected c7232c9979cba684c50b64c513c4a83c9aa70563 before 679ced28a9dc2f6dc679eb05027d779693e60902; affected c7232c9979cba684c50b64c513c4a83c9aa70563 before ec88fa71c82072e9189983b05b499d3507550271; affected c7232c9979cba684c50b64c513c4a83c9aa70563 before 5d1a2240935ea47e2673d0ea17fdb058e4dc91dd |
| Linux / Linux | affected 3.7; unaffected 0 before 3.7; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/49abe564391411057a26a9a943c8e17867c3b9b4
- https://git.kernel.org/stable/c/0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82
- https://git.kernel.org/stable/c/4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777
- https://git.kernel.org/stable/c/a842dab87cab29f2a5798a47b2dc5e6a449950bf
- https://git.kernel.org/stable/c/e35c048d7511e9d4c2a537b8a231c49606e97c16
- https://git.kernel.org/stable/c/679ced28a9dc2f6dc679eb05027d779693e60902
- https://git.kernel.org/stable/c/ec88fa71c82072e9189983b05b499d3507550271
- https://git.kernel.org/stable/c/5d1a2240935ea47e2673d0ea17fdb058e4dc91dd
ADP enrichment
No English description supplied.
No references supplied.