Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: ignore explicit helper on new expectations Use the existing master conntrack helper, anything else is not really supported and it just makes validation more complicated, so just ignore what helper userspace suggests for this expectation. This was uncovered when validating CTA_EXPECT_CLASS via different helper provided by userspace than the existing master conntrack helper: BUG: KASAN: slab-out-of-bounds in nf_ct_expect_related_report+0x2479/0x27c0 Read of size 4 at addr ffff8880043fe408 by task poc/102 Call Trace: nf_ct_expect_related_report+0x2479/0x27c0 ctnetlink_create_expect+0x22b/0x3b0 ctnetlink_new_expect+0x4bd/0x5c0 nfnetlink_rcv_msg+0x67a/0x950 netlink_rcv_skb+0x120/0x350 Allowing to read kernel memory bytes off the expectation boundary. CTA_EXPECT_HELP_NAME is still used to offer the helper name to userspace via netlink dump.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
bd0779370588386e4a67ba5d0b176cfded8e6a53 to < e135f8e8212cbed12a03ab8dec77fa1247139897affectedbd0779370588386e4a67ba5d0b176cfded8e6a53 to < 2ea0f35f235f70c133ad61fe05ba013753b978c6affectedbd0779370588386e4a67ba5d0b176cfded8e6a53 to < 0f6c33697ccfac6499d0b7a4dbdec5d3a3a566cdaffectedbd0779370588386e4a67ba5d0b176cfded8e6a53 to < 187b6ec5229ea93cb04c4f6d3b52efc80f513d0daffectedbd0779370588386e4a67ba5d0b176cfded8e6a53 to < 21a04c31db4057deec85fcd6cc63d720b38819c3affectedbd0779370588386e4a67ba5d0b176cfded8e6a53 to < 917b61fa2042f11e2af4c428e43f08199586633aaffected
Linux Linux
Default version status: affected
3.12affected0 to < 3.12unaffected6.1.168 to ≤ 6.1.*unaffected6.6.134 to ≤ 6.6.*unaffected6.12.81 to ≤ 6.12.*unaffected6.18.22 to ≤ 6.18.*unaffected6.19.12 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e135f8e8212cbed12a03ab8dec77fa1247139897 ↗
- https://git.kernel.org/stable/c/2ea0f35f235f70c133ad61fe05ba013753b978c6 ↗
- https://git.kernel.org/stable/c/0f6c33697ccfac6499d0b7a4dbdec5d3a3a566cd ↗
- https://git.kernel.org/stable/c/187b6ec5229ea93cb04c4f6d3b52efc80f513d0d ↗
- https://git.kernel.org/stable/c/21a04c31db4057deec85fcd6cc63d720b38819c3 ↗
- https://git.kernel.org/stable/c/917b61fa2042f11e2af4c428e43f08199586633a ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗