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。

  - blockbfq修复 wsum 为零时的除以零错误当权重和为零时 limit 的计算会造成除以零错误。继续阅读下一个级别以修复此问题。这是通过以 root 身份运行时发现的:stress-ng --ioprio 0 修复错误 oops 造成的除法: [ 521.450556] 除法错误0000 [#1] SMP NOPTI [ 521.450766] CPU: 2 PID: 2684464 Comm:stress-ng- iopri 未受感染 6.2.1-1280.native #1 [ 521.451117] 硬件名称QEMU Standard PC (i440FX + PIIX, 1996)BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org04/01/2014 [ 521.451627] RIP0010:bfqq_request_over_limit+0x207/0x400 [ 521.451875] Code01 48 8d 0c c8 74 0b 48 8b 82 98 00 00 00 48 8d 0c c8 8b 85 34 ff ff ff 48 89 ca 410f af 410f af 41 50 48 d1 ea 48 98 48 01 d0 31 d2 <48> f7 f1 41 39 41 48 89 85 34 ff ff ff 0f 8c 7b 01 00 00 49 8b 44 [ 521.452699] RSP:
    0018ffffb1af84eb3948 EFLAGS00010046 [ 521.452938] RAX: 000000000000003c RBX: 0000000000000000 RCX
    0000000000000000 [ 521.453262] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffb1af84eb3978 [521.453584R08RBP: ffffb1af84eb3a30 R09[] [ abfba] [abf8 521.453905] [abf8 ] R10[abf8]
    0000000000000000 R110000000000000001 R12ffff8f88ab8a4b18 [ 521.454224] R13ffff8f8699093000 R14
     R150000000000000001  : ffffb1af84eb3970 [ 521.454549] FS: 00005640b6b0b580(0000) GS:ffff8f88b3880000(0000) knlGS:0000000000000000 [ 521.454912] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 521.455170] CR2:
    00007ffcbcae4e38 CR3: 00000002e46de001 CR4: 0000000000770ee0 [ 521.455491] PKRU: 55555554 [ 521.455619] 调用跟踪 [ 521.455736] <TASK> [ 521.455837] ? bfq_request_merge+0x3a/0xc0 [ 521.456027] ? elv_merge+0x115/0x140 [ 521.456191] bfq_limit_depth+0xc8/0x240 [ 521.456366]
    __blk_mq_alloc_requests+0x21a/0x2c0 [ 521.456577] blk_mq_submit_bio+0x23c/0x6c0 [ 521.456766]
    __submit_bio+0xb8/0x140 [ 521.457236] submit_bio_noacct_nocheck+0x212/0x300 [ 521.457748] submit_bio_noacct+0x1a6/0x580 [ 521.458220521.458660] ] submit_bio+0x43/0x80 [  ext4_io_submit+0x23/0x80 [521.459116] ext4_do_writepages/0xd400 [ 521.459596] ext4_writepages+0x65/0x100 [ 521.460050] do_writepages+0xb7/0x1c0 [ 521.460492] __filemap_fdatawrite_range+0xa6/0x100 [ 521.460979] file_write_and_wait_range+0xbf/0x140 [ 521.461452] ext4_sync_file+0x105/0x340 [ 521.461882]
    __x64_sys_fsync+0x67/0x100 [ 521.462305] syscall_exit_to_user_mode+0x2c/0x1c0 [ 521.462768] do_syscall_64+0x3b/0xc0 [ 521.463165] entry_SYSCALL_64_after_hwframe+0x5a/0xc4 [ 521.463621] RIP
    0033:0x5640b6c56590 [ 521.464006] 代码00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 80 3d 71 70 0e 00 00 08 01 0 b0 4 01 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c (CVE-2023-54242)

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-2023-54242

medium Nessus 插件 ID 280707

版本 1.23