Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - wifibrcmfmac修复 brcmf_c_preinit_dcmds() 中可能发生的堆栈越界问题 此修补程序修复了 brcmfmac 中的堆栈越界读取问题其将非 null 结尾的“buf”作为 的参数传递时会发生brcmf_c_preinit_dcmds() 中的 strsep()。此缓冲区由 brcmf_fil_iovar_data_get() 中的 memcpy() 填入固件版本字符串。修补程序可确保 buf 以 null 结尾。由 syzkaller 的修改版本发现。[ 47.569679][ T1897] brcmfmac：brcmf_fw_alloc_request：使用 brcm/brcmfmac43236b 作为芯片BCM43236/3 [ 47.582839][ T1897] brcmfmac：brcmf_c_process_clm_blob：没有可用的 clm_blob（err=-2），设备可用的通道可能有限 [ 47.601565][ T1897] ================================================================== [ 47.602574][ T1897] BUG：KASAN：strsep+0x1b2/0x1f0 中的堆栈越界[ 47.603447][ T1897] 任务 kworker 在地址 ffffc90001f6f000 处读取大小为 1 的数据/0:2/1897  [ 47.604336][ T1897] [ 47.604621][ T1897] CPU：0 PID：1897 通信：kworker/0:2 污染：G O 5.14.0+ #131 [ 47.605617][ T1897] 硬件名称：QEMU 标准 PC（i440FX + PIIX, 1996），BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014  [ 47.606907][ T1897] 工作队列：usb_hub_wq hub_event [ 47.607453][ T1897] 调用跟踪：[ 47.607801][ T1897] dump_stack_lvl+0x8e/0xd1 [ 47.608295][T1897] print_address_description.constprop.0.cold+0xf/0x334 [ 47.609009][ T1897] ? strsep+0x1b2/0x1f0 [47.609434][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609863][ T1897] kasan_report.cold+0x83/0xdf [ 47.610366][T1897] ? strsep+0x1b2/0x1f0 [ 47.610882][ T1897] strsep+0x1b2/0x1f0 [ 47.611300][ T1897] ? brcmf_fil_iovar_data_get+0x3a/0xf0 [ 47.611883][ T1897] brcmf_c_preinit_dcmds+0x995/0xc40 [ 47.612434][T1897] ? brcmf_c_set_joinpref_default+0x100/0x100 [ 47.613078][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.613662][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.614208][T1897] ? lock_acquire+0x19d/0x4e0 [ 47.614704][ T1897] ? find_held_lock+0x2d/0x110 [ 47.615236][ T1897] ? brcmf_usb_deq+0x1a7/0x260 [ 47.615741][ T1897] ? brcmf_usb_rx_fill_all+0x5a/0xf0 [ 47.616288][ T1897] brcmf_attach+0x246/0xd40 [ 47.616758][ T1897] ? wiphy_new_nm+0x1703/0x1dd0 [ 47.617280][ T1897] ? kmemdup+0x43/0x50 [ 47.617720][ T1897] brcmf_usb_probe+0x12de/0x1690 [ 47.618244][ T1897] ? brcmf_usbdev_qinit.constprop.0+0x470/0x470 [ 47.618901][ T1897] usb_probe_interface+0x2aa/0x760 [47.619429][ T1897] ? usb_probe_device+0x250/0x250 [ 47.619950][ T1897] really_probe+0x205/0xb70 [47.620435][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.621048][ T1897]
    __driver_probe_device+0x311/0x4b0 [ 47.621595][ T1897] ? driver_allows_async_probing+0x130/0x130 [47.622209][ T1897] driver_probe_device+0x4e/0x150 [ 47.622739][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.623287][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.623796][ T1897]? bus_rescan_devices+0x30/0x30 [47.624309][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.624907][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.625437][ T1897] __device_attach+0x23f/0x3a0 [ 47.625924][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.626433][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.627057][ T1897] bus_probe_device+0x1da/0x290 [ 47.627557][ T1897] device_add+0xb7b/0x1eb0 [ 47.628027][ T1897] ? wait_for_completion+0x290/0x290 [ 47.628593][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [47.629249][ T1897] usb_set_configuration+0xf59/0x16f0 [ 47.629829][ T1897] usb_generic_driver_probe+0x82/0xa0 [ 47.630385][ T1897] usb_probe_device+0xbb/0x250 [ 47.630927][ T1897]? usb_suspend+0x590/0x590 [ 47.631397][ T1897] real_probe+0x205/0xb70 [ 47.631855][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.632469][ T1897] __driver_probe_device+0x311/0x4b0 [47.633002][ ---truncated--- (CVE-2022-50258)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

检测

Linux Distros 未修补的漏洞：CVE-2022-50258

high Nessus 插件 ID 265022

版本 1.6