Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sctp: avoid auth_enable sysctl UAF during netns teardown proc_sctp_do_auth() updates the SCTP control socket after changing net.sctp.auth_enable. The handler gets the per-net SCTP state from ctl->data, so an already opened sysctl file can still target a network namespace while that namespace is being torn down. SCTP previously registered its per-net sysctls from sctp_defaults_init(), while the control socket is created later from sctp_ctrlsock_init(). This exposed a window during initialization where auth_enable was writable before net->sctp.ctl_sock existed, and a teardown window where auth_enable stayed writable after inet_ctl_sock_destroy() had released the control socket. Move the per-net SCTP sysctl registration into sctp_ctrlsock_init() after sctp_ctl_sock_init() succeeds, and unregister the sysctl table before destroying the control socket in sctp_ctrlsock_exit(). If sysctl registration fails after the control socket was created, destroy the control socket in the same init path. Make sctp_sysctl_net_unregister() tolerate a missing header and clear the saved pointer so init-error and exit paths can safely share the unregister helper.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 10c869a52f266e40f548cc3c565d14930a5edafc before 19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4; affected dc583e7e5f8515ca489c0df28e4362a70eade382 before ceb7190b5c873d4a1267a1600c5aa52c600e929f; affected bd2a2939423566c654545fa3e96a656662a0af9e before fd66854a22661929245f3d2b244c432bc8b1a150; affected 1b67030d39f2b00f94ac1f0af11ba6657589e4d3 before 158f3cc332dc53f43ec20060233d7c3cecd6d912; affected 7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6 before 66700c0719675e0e118ae83b2d7168dacd69dd3d; affected c184bc621e3cef03ac9ba81a50dda2dae6a21d36 before 626bda8cfe43dff19a9833ff6ba055a817b5455c; affected 15649fd5415eda664ef35780c2013adeb5d9c695 before be6aae9d1b91c603adb35872d37d40e83daf8758; affected 15649fd5415eda664ef35780c2013adeb5d9c695 before a50e73488e0bbdd262b3be3c9a1d8dd078382381; affected 15649fd5415eda664ef35780c2013adeb5d9c695 before f8d5e7846025f4ab15a461235f8ebae9094a361a; affected 5.4.290 before 5.4.292; affected 5.10.234 before 5.10.266; affected 5.15.177 before 5.15.217; affected 6.1.125 before 6.1.184; affected 6.6.72 before 6.6.151; affected 6.12.10 before 6.12.101 |
| Linux / Linux | affected 6.13; unaffected 0 before 6.13; unaffected 5.4.292 through 5.4.*; unaffected 5.10.266 through 5.10.*; unaffected 5.15.217 through 5.15.*; unaffected 6.1.184 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4
- https://git.kernel.org/stable/c/ceb7190b5c873d4a1267a1600c5aa52c600e929f
- https://git.kernel.org/stable/c/fd66854a22661929245f3d2b244c432bc8b1a150
- https://git.kernel.org/stable/c/158f3cc332dc53f43ec20060233d7c3cecd6d912
- https://git.kernel.org/stable/c/66700c0719675e0e118ae83b2d7168dacd69dd3d
- https://git.kernel.org/stable/c/626bda8cfe43dff19a9833ff6ba055a817b5455c
- https://git.kernel.org/stable/c/be6aae9d1b91c603adb35872d37d40e83daf8758
- https://git.kernel.org/stable/c/a50e73488e0bbdd262b3be3c9a1d8dd078382381
- https://git.kernel.org/stable/c/f8d5e7846025f4ab15a461235f8ebae9094a361a
ADP enrichment
No English description supplied.
No references supplied.