| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <2025050149-CVE-2022-49865-cd5b@gregkh> Date: Thu, 1 May 2025 16:10:55 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2022-49865: ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network When copying a `struct ifaddrlblmsg` to the network, __ifal_reserved remained uninitialized, resulting in a 1-byte infoleak: BUG: KMSAN: kernel-network-infoleak in __netdev_start_xmit ./include/linux/netdevice.h:4841 __netdev_start_xmit ./include/linux/netdevice.h:4841 netdev_start_xmit ./include/linux/netdevice.h:4857 xmit_one net/core/dev.c:3590 dev_hard_start_xmit+0x1dc/0x800 net/core/dev.c:3606 __dev_queue_xmit+0x17e8/0x4350 net/core/dev.c:4256 dev_queue_xmit ./include/linux/netdevice.h:3009 __netlink_deliver_tap_skb net/netlink/af_netlink.c:307 __netlink_deliver_tap+0x728/0xad0 net/netlink/af_netlink.c:325 netlink_deliver_tap net/netlink/af_netlink.c:338 __netlink_sendskb net/netlink/af_netlink.c:1263 netlink_sendskb+0x1d9/0x200 net/netlink/af_netlink.c:1272 netlink_unicast+0x56d/0xf50 net/netlink/af_netlink.c:1360 nlmsg_unicast ./include/net/netlink.h:1061 rtnl_unicast+0x5a/0x80 net/core/rtnetlink.c:758 ip6addrlbl_get+0xfad/0x10f0 net/ipv6/addrlabel.c:628 rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082 ... Uninit was created at: slab_post_alloc_hook+0x118/0xb00 mm/slab.h:742 slab_alloc_node mm/slub.c:3398 __kmem_cache_alloc_node+0x4f2/0x930 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 __kmalloc_node_track_caller+0x117/0x3d0 mm/slab_common.c:975 kmalloc_reserve net/core/skbuff.c:437 __alloc_skb+0x27a/0xab0 net/core/skbuff.c:509 alloc_skb ./include/linux/skbuff.h:1267 nlmsg_new ./include/net/netlink.h:964 ip6addrlbl_get+0x490/0x10f0 net/ipv6/addrlabel.c:608 rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082 netlink_rcv_skb+0x299/0x550 net/netlink/af_netlink.c:2540 rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:6109 netlink_unicast_kernel net/netlink/af_netlink.c:1319 netlink_unicast+0x9ab/0xf50 net/netlink/af_netlink.c:1345 netlink_sendmsg+0xebc/0x10f0 net/netlink/af_netlink.c:1921 ... This patch ensures that the reserved field is always initialized. The Linux kernel CVE team has assigned CVE-2022-49865 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 4.9.334 with commit 568a47ff756f913e8b374c2af9d22cd2c772c744 Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 4.14.300 with commit 0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 4.19.267 with commit 6d26d0587abccb9835382a0b53faa7b9b1cd83e3 Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 5.4.225 with commit 58cd7fdc8c1e6c7873acc08f190069fed88d1c12 Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 5.10.155 with commit a033b86c7f7621fde31f0364af8986f43b44914f Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 5.15.79 with commit 2acb2779b147decd300c117683d5a32ce61c75d6 Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 6.0.9 with commit 49e92ba5ecd7d72ba369dde2ccff738edd028a47 Issue introduced in 2.6.25 with commit 2a8cc6c89039e0530a3335954253b76ed0f9339a and fixed in 6.1 with commit c23fb2c82267638f9d206cb96bb93e1f93ad7828 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2022-49865 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/ipv6/addrlabel.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/568a47ff756f913e8b374c2af9d22cd2c772c744 https://git.kernel.org/stable/c/0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf https://git.kernel.org/stable/c/6d26d0587abccb9835382a0b53faa7b9b1cd83e3 https://git.kernel.org/stable/c/58cd7fdc8c1e6c7873acc08f190069fed88d1c12 https://git.kernel.org/stable/c/a033b86c7f7621fde31f0364af8986f43b44914f https://git.kernel.org/stable/c/2acb2779b147decd300c117683d5a32ce61c75d6 https://git.kernel.org/stable/c/49e92ba5ecd7d72ba369dde2ccff738edd028a47 https://git.kernel.org/stable/c/c23fb2c82267638f9d206cb96bb93e1f93ad7828
Powered by blists - more mailing lists