Description
In the Linux kernel, the following vulnerability has been resolved: geneve: require CAP_NET_ADMIN in the device netns for changelink A tunnel changelink() operates on at most two netns, dev_net(dev) and the sticky underlay netns geneve->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in geneve->net can rewrite a geneve device whose underlay lives in geneve->net. geneve_changelink() applies the new configuration against geneve->net: geneve_link_config() and the geneve_quiesce()/geneve_unquiesce() pair reopen the underlay sockets in that netns (geneve_sock_add() uses geneve->net), so the same reasoning as the tunnel changelink series applies here. Gate geneve_changelink() with rtnl_dev_link_net_capable(), at the top of the op before any attribute is parsed, matching ipgre_changelink() and the rest of the "require CAP_NET_ADMIN in the device netns for changelink" series. Found by 0sec automated security-research tooling (https://0sec.ai).
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
5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < a5522963c57f12df5f9db804ebfc472b58eef0aeaffected5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < 278c6a31ee27c931c722202c8c06cc3253923254affected5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < 11a7d989d00160481a273eb4f7f05f64b5a6ffdfaffected5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < 2abdacc927c92fa6a9cc8341e8c9b88dcb561553affected5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < 9de5518fc1fab583526a8f66b8e505c4864dc60aaffected5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < f8c498585d2a08aa623748353c3e61467b7e9fd2affected5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < 95f45e20f1b2cec13823f0f68060ab4b2261b2c1affected5b861f6baa3a22a48d7a4ad0ce38a223d36c978a to < 8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01affected
Linux Linux
Default version status: affected
4.14affected0 to < 4.14unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.42 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/a5522963c57f12df5f9db804ebfc472b58eef0ae ↗
- https://git.kernel.org/stable/c/278c6a31ee27c931c722202c8c06cc3253923254 ↗
- https://git.kernel.org/stable/c/11a7d989d00160481a273eb4f7f05f64b5a6ffdf ↗
- https://git.kernel.org/stable/c/2abdacc927c92fa6a9cc8341e8c9b88dcb561553 ↗
- https://git.kernel.org/stable/c/9de5518fc1fab583526a8f66b8e505c4864dc60a ↗
- https://git.kernel.org/stable/c/f8c498585d2a08aa623748353c3e61467b7e9fd2 ↗
- https://git.kernel.org/stable/c/95f45e20f1b2cec13823f0f68060ab4b2261b2c1 ↗
- https://git.kernel.org/stable/c/8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01 ↗