Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: Avoid nf_ct_helper_hash uses after free If nf_conntrack_init_start() fails (for example due to a register_nf_conntrack_bpf() failure), the nf_conntrack_helper_fini() clean-up path frees the nf_ct_helper_hash map. When built with NF_CONNTRACK=y, further netfilter modules (e.g: netfilter_conntrack_ftp) can still be loaded and call nf_conntrack_helpers_register(), independently of whether nf_conntrack initialized correctly. This accesses the nf_ct_helper_hash dangling pointer and causes a uaf, possibly leading to random memory corruption. This patch guards nf_conntrack_helper_register() from accessing a freed or uninitialized nf_ct_helper_hash pointer and fixes possible uses-after-free when loading a conntrack module.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before 4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7; affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before 00716f25f9697d02a0d9bd622575c7c7321ba3d0; affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before 61c7a5256543ae7d24cd9d21853d514c8632e1e9; affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before 8289d422f5e484efe4a565fe18e862ecd621c175; affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before 6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566; affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before 05561f822f27b9fa88fa5504ddec34bf38833034; affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7; affected 12f7a505331e6b2754684b509f2ac8f0011ce644 before 6eef7a2b933885a17679eb8ed0796ddf0ee5309b |
| Linux / Linux | affected 3.6; unaffected 0 before 3.6; unaffected 4.14.322 through 4.14.*; unaffected 4.19.291 through 4.19.*; unaffected 5.4.251 through 5.4.*; unaffected 5.10.188 through 5.10.*; unaffected 5.15.121 through 5.15.*; unaffected 6.1.39 through 6.1.*; unaffected 6.4.4 through 6.4.*; unaffected 6.5 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7
- https://git.kernel.org/stable/c/00716f25f9697d02a0d9bd622575c7c7321ba3d0
- https://git.kernel.org/stable/c/61c7a5256543ae7d24cd9d21853d514c8632e1e9
- https://git.kernel.org/stable/c/8289d422f5e484efe4a565fe18e862ecd621c175
- https://git.kernel.org/stable/c/6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566
- https://git.kernel.org/stable/c/05561f822f27b9fa88fa5504ddec34bf38833034
- https://git.kernel.org/stable/c/fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7
- https://git.kernel.org/stable/c/6eef7a2b933885a17679eb8ed0796ddf0ee5309b
ADP enrichment
No English description supplied.
No references supplied.