CVE-2023-52803— 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SUNRPC模块存在漏洞。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 0157d021d23a087eecfa830502f81cfe843f0d16< 17866066b8ac1cc38fb449670bc15dc9fee4b40a |
affected |
0157d021d23a087eecfa830502f81cfe843f0d16< 7d61d1da2ed1f682c41cae0c8d4719cdaccee5c5 |
affected | ||
0157d021d23a087eecfa830502f81cfe843f0d16< dedf2a0eb9448ae73b270743e6ea9b108189df46 |
affected | ||
0157d021d23a087eecfa830502f81cfe843f0d16< 194454afa6aa9d6ed74f0c57127bc8beb27c20df |
affected | ||
0157d021d23a087eecfa830502f81cfe843f0d16< 7749fd2dbef72a52b5c9ffdbf877691950ed4680 |
affected | ||
0157d021d23a087eecfa830502f81cfe843f0d16< 1cdb52ffd6600a37bd355d8dce58ecd03e55e618 |
affected | ||
0157d021d23a087eecfa830502f81cfe843f0d16< cc2e7ebbeb1d0601f7f3c8d93b78fcc03a95e44a |
affected | ||
0157d021d23a087eecfa830502f81cfe843f0d16< bfca5fb4e97c46503ddfc582335917b0cc228264 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2023-52803 基础信息
漏洞信息
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Vulnerability Title
SUNRPC: Fix RPC client cleaned up the freed pipefs dentries
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: Fix RPC client cleaned up the freed pipefs dentries
RPC client pipefs dentries cleanup is in separated rpc_remove_pipedir()
workqueue,which takes care about pipefs superblock locking.
In some special scenarios, when kernel frees the pipefs sb of the
current client and immediately alloctes a new pipefs sb,
rpc_remove_pipedir function would misjudge the existence of pipefs
sb which is not the one it used to hold. As a result,
the rpc_remove_pipedir would clean the released freed pipefs dentries.
To fix this issue, rpc_remove_pipedir should check whether the
current pipefs sb is consistent with the original pipefs sb.
This error can be catched by KASAN:
=========================================================
[ 250.497700] BUG: KASAN: slab-use-after-free in dget_parent+0x195/0x200
[ 250.498315] Read of size 4 at addr ffff88800a2ab804 by task kworker/0:18/106503
[ 250.500549] Workqueue: events rpc_free_client_work
[ 250.501001] Call Trace:
[ 250.502880] kasan_report+0xb6/0xf0
[ 250.503209] ? dget_parent+0x195/0x200
[ 250.503561] dget_parent+0x195/0x200
[ 250.503897] ? __pfx_rpc_clntdir_depopulate+0x10/0x10
[ 250.504384] rpc_rmdir_depopulate+0x1b/0x90
[ 250.504781] rpc_remove_client_dir+0xf5/0x150
[ 250.505195] rpc_free_client_work+0xe4/0x230
[ 250.505598] process_one_work+0x8ee/0x13b0
...
[ 22.039056] Allocated by task 244:
[ 22.039390] kasan_save_stack+0x22/0x50
[ 22.039758] kasan_set_track+0x25/0x30
[ 22.040109] __kasan_slab_alloc+0x59/0x70
[ 22.040487] kmem_cache_alloc_lru+0xf0/0x240
[ 22.040889] __d_alloc+0x31/0x8e0
[ 22.041207] d_alloc+0x44/0x1f0
[ 22.041514] __rpc_lookup_create_exclusive+0x11c/0x140
[ 22.041987] rpc_mkdir_populate.constprop.0+0x5f/0x110
[ 22.042459] rpc_create_client_dir+0x34/0x150
[ 22.042874] rpc_setup_pipedir_sb+0x102/0x1c0
[ 22.043284] rpc_client_register+0x136/0x4e0
[ 22.043689] rpc_new_client+0x911/0x1020
[ 22.044057] rpc_create_xprt+0xcb/0x370
[ 22.044417] rpc_create+0x36b/0x6c0
...
[ 22.049524] Freed by task 0:
[ 22.049803] kasan_save_stack+0x22/0x50
[ 22.050165] kasan_set_track+0x25/0x30
[ 22.050520] kasan_save_free_info+0x2b/0x50
[ 22.050921] __kasan_slab_free+0x10e/0x1a0
[ 22.051306] kmem_cache_free+0xa5/0x390
[ 22.051667] rcu_core+0x62c/0x1930
[ 22.051995] __do_softirq+0x165/0x52a
[ 22.052347]
[ 22.052503] Last potentially related work creation:
[ 22.052952] kasan_save_stack+0x22/0x50
[ 22.053313] __kasan_record_aux_stack+0x8e/0xa0
[ 22.053739] __call_rcu_common.constprop.0+0x6b/0x8b0
[ 22.054209] dentry_free+0xb2/0x140
[ 22.054540] __dentry_kill+0x3be/0x540
[ 22.054900] shrink_dentry_list+0x199/0x510
[ 22.055293] shrink_dcache_parent+0x190/0x240
[ 22.055703] do_one_tree+0x11/0x40
[ 22.056028] shrink_dcache_for_umount+0x61/0x140
[ 22.056461] generic_shutdown_super+0x70/0x590
[ 22.056879] kill_anon_super+0x3a/0x60
[ 22.057234] rpc_kill_sb+0x121/0x200
来源: CVE Program / CVE List V5
CVSS Information
N/A
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SUNRPC模块存在漏洞。
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-2023-52803 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2023-52803 其他参考 (7)
同批安全公告 · Linux · 2024-05-21 · 共 361 条
| CVE-2021-47427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47328 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52732 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52741 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47232 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52755 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47378 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52769 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47308 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52801 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52798 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52846 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52790 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52776 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47388 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47390 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47352 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52829 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47240 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47244 | 8.2 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 361 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2023-52803
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