CVE-2022-48913— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于内存释放后重用。
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c0ea57608b691d6cde8aff23e11f9858a86b5918< 78acc7dbd84a8c173a08584750845c31611160f2 |
affected |
c0ea57608b691d6cde8aff23e11f9858a86b5918< 6418634238ade86f2b08192928787f39d8afb58c |
affected | ||
c0ea57608b691d6cde8aff23e11f9858a86b5918< 30939293262eb433c960c4532a0d59c4073b2b84 |
affected | ||
5.12 |
affected | ||
< 5.12 |
unaffected | ||
5.15.27≤ 5.15.* |
unaffected | ||
5.16.13≤ 5.16.* |
unaffected | ||
5.17≤ * |
unaffected |
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一、 漏洞 CVE-2022-48913 基础信息
漏洞信息
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Vulnerability Title
blktrace: fix use after free for struct blk_trace
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
blktrace: fix use after free for struct blk_trace
When tracing the whole disk, 'dropped' and 'msg' will be created
under 'q->debugfs_dir' and 'bt->dir' is NULL, thus blk_trace_free()
won't remove those files. What's worse, the following UAF can be
triggered because of accessing stale 'dropped' and 'msg':
==================================================================
BUG: KASAN: use-after-free in blk_dropped_read+0x89/0x100
Read of size 4 at addr ffff88816912f3d8 by task blktrace/1188
CPU: 27 PID: 1188 Comm: blktrace Not tainted 5.17.0-rc4-next-20220217+ #469
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-4
Call Trace:
<TASK>
dump_stack_lvl+0x34/0x44
print_address_description.constprop.0.cold+0xab/0x381
? blk_dropped_read+0x89/0x100
? blk_dropped_read+0x89/0x100
kasan_report.cold+0x83/0xdf
? blk_dropped_read+0x89/0x100
kasan_check_range+0x140/0x1b0
blk_dropped_read+0x89/0x100
? blk_create_buf_file_callback+0x20/0x20
? kmem_cache_free+0xa1/0x500
? do_sys_openat2+0x258/0x460
full_proxy_read+0x8f/0xc0
vfs_read+0xc6/0x260
ksys_read+0xb9/0x150
? vfs_write+0x3d0/0x3d0
? fpregs_assert_state_consistent+0x55/0x60
? exit_to_user_mode_prepare+0x39/0x1e0
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbc080d92fd
Code: ce 20 00 00 75 10 b8 00 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 1
RSP: 002b:00007fbb95ff9cb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fbb95ff9dc0 RCX: 00007fbc080d92fd
RDX: 0000000000000100 RSI: 00007fbb95ff9cc0 RDI: 0000000000000045
RBP: 0000000000000045 R08: 0000000000406299 R09: 00000000fffffffd
R10: 000000000153afa0 R11: 0000000000000293 R12: 00007fbb780008c0
R13: 00007fbb78000938 R14: 0000000000608b30 R15: 00007fbb780029c8
</TASK>
Allocated by task 1050:
kasan_save_stack+0x1e/0x40
__kasan_kmalloc+0x81/0xa0
do_blk_trace_setup+0xcb/0x410
__blk_trace_setup+0xac/0x130
blk_trace_ioctl+0xe9/0x1c0
blkdev_ioctl+0xf1/0x390
__x64_sys_ioctl+0xa5/0xe0
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 1050:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
kasan_set_free_info+0x20/0x30
__kasan_slab_free+0x103/0x180
kfree+0x9a/0x4c0
__blk_trace_remove+0x53/0x70
blk_trace_ioctl+0x199/0x1c0
blkdev_common_ioctl+0x5e9/0xb30
blkdev_ioctl+0x1a5/0x390
__x64_sys_ioctl+0xa5/0xe0
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff88816912f380
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 88 bytes inside of
96-byte region [ffff88816912f380, ffff88816912f3e0)
The buggy address belongs to the page:
page:000000009a1b4e7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0f
flags: 0x17ffffc0000200(slab|node=0|zone=2|lastcpupid=0x1fffff)
raw: 0017ffffc0000200 ffffea00044f1100 dead000000000002 ffff88810004c780
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88816912f280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff88816912f300: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88816912f380: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff88816912f400: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff88816912f480: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于内存释放后重用。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2022-48913 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-48913 其他参考 (3)
同批安全公告 · Linux · 2024-08-22 · 共 42 条
| CVE-2022-48941 | 8.8 HIGH | Linux kernel 竞争条件问题漏洞 |
| CVE-2022-48919 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48925 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48923 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48927 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48912 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48911 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48932 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48935 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48940 | 7.8 HIGH | Linux kernel 缓冲区错误漏洞 |
| CVE-2022-48943 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48933 | Linux kernel 安全漏洞 | |
| CVE-2022-48934 | Linux kernel 安全漏洞 | |
| CVE-2022-48931 | Linux kernel 安全漏洞 | |
| CVE-2022-48937 | Linux kernel 安全漏洞 | |
| CVE-2022-48930 | Linux kernel 安全漏洞 | |
| CVE-2022-48929 | Linux kernel 安全漏洞 | |
| CVE-2022-48928 | Linux kernel 安全漏洞 | |
| CVE-2022-48938 | Linux kernel 输入验证错误漏洞 | |
| CVE-2022-48939 | Linux kernel 安全漏洞 |
显示前 20 条，共 42 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-48913
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