Description
In the Linux kernel, the following vulnerability has been resolved: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls /dev/ppp open is currently authorized against file->f_cred->user_ns, while unattached administrative ioctls operate on current->nsproxy->net_ns. As a result, a local unprivileged user can create a new user namespace with CLONE_NEWUSER, gain CAP_NET_ADMIN only in that new user namespace, and still issue PPPIOCNEWUNIT, PPPIOCATTACH, or PPPIOCATTCHAN against an inherited network namespace. Require CAP_NET_ADMIN in the user namespace that owns the target network namespace before handling unattached PPP administrative ioctls. This preserves normal pppd operation in the network namespace it is actually privileged in, while rejecting the userns-only inherited-netns case.
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
273ec51dd7ceaa76e038875d85061ec856d8905e to < c9edd90c57ae23692fff6b049fdfa4572a9fd532affected273ec51dd7ceaa76e038875d85061ec856d8905e to < 5080e188c914110034bbc569d5cfa2f06204681daffected273ec51dd7ceaa76e038875d85061ec856d8905e to < 67e901e28d177ac9a9bed76d69ce3471e704a89eaffected273ec51dd7ceaa76e038875d85061ec856d8905e to < 954745d0223e7caec917c0b2d1a889ff56fa6e54affected273ec51dd7ceaa76e038875d85061ec856d8905e to < 3b2c2157dc2afc5c17cd7238afefca92f1ef330eaffected273ec51dd7ceaa76e038875d85061ec856d8905e to < 5013be175c7ffd8b39efbc3c9c4db5b10b85fea8affected273ec51dd7ceaa76e038875d85061ec856d8905e to < 1a8a51ce85075a56a743b6f142606dd2696a391caffected273ec51dd7ceaa76e038875d85061ec856d8905e to < 2bb6379416fd19f44c3423a00bfd8626259f6067affected
Linux Linux
Default version status: affected
2.6.30affected0 to < 2.6.30unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.141 to ≤ 6.6.*unaffected6.12.91 to ≤ 6.12.*unaffected6.18.33 to ≤ 6.18.*unaffected7.0.10 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c9edd90c57ae23692fff6b049fdfa4572a9fd532 ↗
- https://git.kernel.org/stable/c/5080e188c914110034bbc569d5cfa2f06204681d ↗
- https://git.kernel.org/stable/c/67e901e28d177ac9a9bed76d69ce3471e704a89e ↗
- https://git.kernel.org/stable/c/954745d0223e7caec917c0b2d1a889ff56fa6e54 ↗
- https://git.kernel.org/stable/c/3b2c2157dc2afc5c17cd7238afefca92f1ef330e ↗
- https://git.kernel.org/stable/c/5013be175c7ffd8b39efbc3c9c4db5b10b85fea8 ↗
- https://git.kernel.org/stable/c/1a8a51ce85075a56a743b6f142606dd2696a391c ↗
- https://git.kernel.org/stable/c/2bb6379416fd19f44c3423a00bfd8626259f6067 ↗