| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-42106: inet_diag: Initialize pad field in struct inet_diag_req_v2 |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| inet_diag: Initialize pad field in struct inet_diag_req_v2 |
| |
| KMSAN reported uninit-value access in raw_lookup() [1]. Diag for raw |
| sockets uses the pad field in struct inet_diag_req_v2 for the |
| underlying protocol. This field corresponds to the sdiag_raw_protocol |
| field in struct inet_diag_req_raw. |
| |
| inet_diag_get_exact_compat() converts inet_diag_req to |
| inet_diag_req_v2, but leaves the pad field uninitialized. So the issue |
| occurs when raw_lookup() accesses the sdiag_raw_protocol field. |
| |
| Fix this by initializing the pad field in |
| inet_diag_get_exact_compat(). Also, do the same fix in |
| inet_diag_dump_compat() to avoid the similar issue in the future. |
| |
| [1] |
| BUG: KMSAN: uninit-value in raw_lookup net/ipv4/raw_diag.c:49 [inline] |
| BUG: KMSAN: uninit-value in raw_sock_get+0x657/0x800 net/ipv4/raw_diag.c:71 |
| raw_lookup net/ipv4/raw_diag.c:49 [inline] |
| raw_sock_get+0x657/0x800 net/ipv4/raw_diag.c:71 |
| raw_diag_dump_one+0xa1/0x660 net/ipv4/raw_diag.c:99 |
| inet_diag_cmd_exact+0x7d9/0x980 |
| inet_diag_get_exact_compat net/ipv4/inet_diag.c:1404 [inline] |
| inet_diag_rcv_msg_compat+0x469/0x530 net/ipv4/inet_diag.c:1426 |
| sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282 |
| netlink_rcv_skb+0x537/0x670 net/netlink/af_netlink.c:2564 |
| sock_diag_rcv+0x35/0x40 net/core/sock_diag.c:297 |
| netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] |
| netlink_unicast+0xe74/0x1240 net/netlink/af_netlink.c:1361 |
| netlink_sendmsg+0x10c6/0x1260 net/netlink/af_netlink.c:1905 |
| sock_sendmsg_nosec net/socket.c:730 [inline] |
| __sock_sendmsg+0x332/0x3d0 net/socket.c:745 |
| ____sys_sendmsg+0x7f0/0xb70 net/socket.c:2585 |
| ___sys_sendmsg+0x271/0x3b0 net/socket.c:2639 |
| __sys_sendmsg net/socket.c:2668 [inline] |
| __do_sys_sendmsg net/socket.c:2677 [inline] |
| __se_sys_sendmsg net/socket.c:2675 [inline] |
| __x64_sys_sendmsg+0x27e/0x4a0 net/socket.c:2675 |
| x64_sys_call+0x135e/0x3ce0 arch/x86/include/generated/asm/syscalls_64.h:47 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xd9/0x1e0 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x77/0x7f |
| |
| Uninit was stored to memory at: |
| raw_sock_get+0x650/0x800 net/ipv4/raw_diag.c:71 |
| raw_diag_dump_one+0xa1/0x660 net/ipv4/raw_diag.c:99 |
| inet_diag_cmd_exact+0x7d9/0x980 |
| inet_diag_get_exact_compat net/ipv4/inet_diag.c:1404 [inline] |
| inet_diag_rcv_msg_compat+0x469/0x530 net/ipv4/inet_diag.c:1426 |
| sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282 |
| netlink_rcv_skb+0x537/0x670 net/netlink/af_netlink.c:2564 |
| sock_diag_rcv+0x35/0x40 net/core/sock_diag.c:297 |
| netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] |
| netlink_unicast+0xe74/0x1240 net/netlink/af_netlink.c:1361 |
| netlink_sendmsg+0x10c6/0x1260 net/netlink/af_netlink.c:1905 |
| sock_sendmsg_nosec net/socket.c:730 [inline] |
| __sock_sendmsg+0x332/0x3d0 net/socket.c:745 |
| ____sys_sendmsg+0x7f0/0xb70 net/socket.c:2585 |
| ___sys_sendmsg+0x271/0x3b0 net/socket.c:2639 |
| __sys_sendmsg net/socket.c:2668 [inline] |
| __do_sys_sendmsg net/socket.c:2677 [inline] |
| __se_sys_sendmsg net/socket.c:2675 [inline] |
| __x64_sys_sendmsg+0x27e/0x4a0 net/socket.c:2675 |
| x64_sys_call+0x135e/0x3ce0 arch/x86/include/generated/asm/syscalls_64.h:47 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xd9/0x1e0 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x77/0x7f |
| |
| Local variable req.i created at: |
| inet_diag_get_exact_compat net/ipv4/inet_diag.c:1396 [inline] |
| inet_diag_rcv_msg_compat+0x2a6/0x530 net/ipv4/inet_diag.c:1426 |
| sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282 |
| |
| CPU: 1 PID: 8888 Comm: syz-executor.6 Not tainted 6.10.0-rc4-00217-g35bb670d65fc #32 |
| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014 |
| |
| The Linux kernel CVE team has assigned CVE-2024-42106 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 4.19.318 with commit 7094a5fd20ab66028f1da7f06e0f2692d70346f9 |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 5.4.280 with commit 0184bf0a349f4cf9e663abbe862ff280e8e4dfa2 |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 5.10.222 with commit 7ef519c8efde152e0d632337f2994f6921e0b7e4 |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 5.15.163 with commit 8366720519ea8d322a20780debdfd23d9fc0904a |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 6.1.98 with commit d6f487e0704de2f2d15f8dd5d7d723210f2b2fdb |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 6.6.39 with commit 76965648fe6858db7c5f3c700fef7aa5f124ca1c |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 6.9.9 with commit f9b2010e8af49fac9d9562146fb81744d8a9b051 |
| Issue introduced in 4.10 with commit 432490f9d455fb842d70219f22d9d2c812371676 and fixed in 6.10 with commit 61cf1c739f08190a4cbf047b9fbb192a94d87e3f |
| |
| 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-2024-42106 |
| 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/ipv4/inet_diag.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/7094a5fd20ab66028f1da7f06e0f2692d70346f9 |
| https://git.kernel.org/stable/c/0184bf0a349f4cf9e663abbe862ff280e8e4dfa2 |
| https://git.kernel.org/stable/c/7ef519c8efde152e0d632337f2994f6921e0b7e4 |
| https://git.kernel.org/stable/c/8366720519ea8d322a20780debdfd23d9fc0904a |
| https://git.kernel.org/stable/c/d6f487e0704de2f2d15f8dd5d7d723210f2b2fdb |
| https://git.kernel.org/stable/c/76965648fe6858db7c5f3c700fef7aa5f124ca1c |
| https://git.kernel.org/stable/c/f9b2010e8af49fac9d9562146fb81744d8a9b051 |
| https://git.kernel.org/stable/c/61cf1c739f08190a4cbf047b9fbb192a94d87e3f |
