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: <2024030256-CVE-2023-52574-a423@gregkh> Date: Sat, 2 Mar 2024 23:00:08 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2023-52574: team: fix null-ptr-deref when team device type is changed Description =========== In the Linux kernel, the following vulnerability has been resolved: team: fix null-ptr-deref when team device type is changed Get a null-ptr-deref bug as follows with reproducer [1]. BUG: kernel NULL pointer dereference, address: 0000000000000228 .. RIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q] .. Call Trace: <TASK> ? __die+0x24/0x70 ? page_fault_oops+0x82/0x150 ? exc_page_fault+0x69/0x150 ? asm_exc_page_fault+0x26/0x30 ? vlan_dev_hard_header+0x35/0x140 [8021q] ? vlan_dev_hard_header+0x8e/0x140 [8021q] neigh_connected_output+0xb2/0x100 ip6_finish_output2+0x1cb/0x520 ? nf_hook_slow+0x43/0xc0 ? ip6_mtu+0x46/0x80 ip6_finish_output+0x2a/0xb0 mld_sendpack+0x18f/0x250 mld_ifc_work+0x39/0x160 process_one_work+0x1e6/0x3f0 worker_thread+0x4d/0x2f0 ? __pfx_worker_thread+0x10/0x10 kthread+0xe5/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 [1] $ teamd -t team0 -d -c '{"runner": {"name": "loadbalance"}}' $ ip link add name t-dummy type dummy $ ip link add link t-dummy name t-dummy.100 type vlan id 100 $ ip link add name t-nlmon type nlmon $ ip link set t-nlmon master team0 $ ip link set t-nlmon nomaster $ ip link set t-dummy up $ ip link set team0 up $ ip link set t-dummy.100 down $ ip link set t-dummy.100 master team0 When enslave a vlan device to team device and team device type is changed from non-ether to ether, header_ops of team device is changed to vlan_header_ops. That is incorrect and will trigger null-ptr-deref for vlan->real_dev in vlan_dev_hard_header() because team device is not a vlan device. Cache eth_header_ops in team_setup(), then assign cached header_ops to header_ops of team net device when its type is changed from non-ether to ether to fix the bug. The Linux kernel CVE team has assigned CVE-2023-52574 to this issue. Affected and fixed versions =========================== Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 4.14.327 with commit 1779eb51b9cc Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 4.19.296 with commit a7fb47b97111 Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 5.4.258 with commit c5f6478686bb Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 5.10.198 with commit b44dd92e2afd Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 5.15.134 with commit cd05eec2ee0c Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 6.1.56 with commit 2f0acb0736ec Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 6.5.6 with commit cac50d9f5d87 Issue introduced in 3.7 with commit 1d76efe1577b and fixed in 6.6 with commit 492032760127 Please see https://www.kernel.org or 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-2023-52574 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: drivers/net/team/team.c include/linux/if_team.h 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/1779eb51b9cc628cee551f252701a85a2a50a457 https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7 https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7 https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255 https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58 https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd
Powered by blists - more mailing lists