cnvd - cnvd-2024-30378

cnvd-2024-30378

Vulnerability from cnvd

Title: Linux kernel代码执行漏洞（CNVD-2024-30378）

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存在代码执行漏洞，该漏洞是由llcp_sock_bind/connect中的“释放后使用”缺陷引起的。攻击者可利用此漏洞在系统上执行任意代码。

Severity: 中

Patch Name: Linux kernel代码执行漏洞（CNVD-2024-30378）的补丁

Patch 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存在代码执行漏洞，该漏洞是由llcp_sock_bind/connect中的“释放后使用”缺陷引起的。攻击者可利用此漏洞在系统上执行任意代码。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

厂商已发布了漏洞修复程序，请及时关注更新： https://www.kernel.org/

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-47068

Impacted products

Name
Linux Linux kernel

Show details on source website

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    "cve": {
      "cveNumber": "CVE-2021-47068"
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  "number": "CNVD-2024-30378",
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CVE-2021-47068 (GCVE-0-2021-47068)

Vulnerability from cvelistv5

Published

2024-02-29 22:37

Modified

2025-05-04 07:03

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net/nfc: fix use-after-free llcp_sock_bind/connect Commits 8a4cd82d ("nfc: fix refcount leak in llcp_sock_connect()") and c33b1cc62 ("nfc: fix refcount leak in llcp_sock_bind()") fixed a refcount leak bug in bind/connect but introduced a use-after-free if the same local is assigned to 2 different sockets. This can be triggered by the following simple program: int sock1 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP ); int sock2 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP ); memset( &addr, 0, sizeof(struct sockaddr_nfc_llcp) ); addr.sa_family = AF_NFC; addr.nfc_protocol = NFC_PROTO_NFC_DEP; bind( sock1, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) ) bind( sock2, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) ) close(sock1); close(sock2); Fix this by assigning NULL to llcp_sock->local after calling nfc_llcp_local_put. This addresses CVE-2021-23134.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/26157c82ba756767b2bd66d28a71b1bc454447f6
	https://git.kernel.org/stable/c/ccddad6dd28530e716448e594c9ca7c76ccd0570
	https://git.kernel.org/stable/c/18ae4a192a4496e48a5490b52812645d2413307c
	https://git.kernel.org/stable/c/48fba458fe54cc2a980a05c13e6c19b8b2cfb610
	https://git.kernel.org/stable/c/e32352070bcac22be6ed8ab635debc280bb65b8c
	https://git.kernel.org/stable/c/6b7021ed36dabf29e56842e3408781cd3b82ef6e
	https://git.kernel.org/stable/c/374cdde4dcc9c909a60713abdbbf96d5e3e09f91
	https://git.kernel.org/stable/c/18175fe17ae043a0b81e5d511f8817825784c299
	https://git.kernel.org/stable/c/c61760e6940dd4039a7f5e84a6afc9cdbf4d82b6

Impacted products

Vendor

Product

Version

▼

Linux

Version: a1cdd18c49d23ec38097ac2c5b0d761146fc0109
Version: 18013007b596771bf5f5e7feee9586fb0386ad14
Version: 538a6ff11516d38a61e237d2d2dc04c30c845fbe
Version: adbb1d218c5f56dbae052765da83c0f57fce2a31
Version: c89903c9eff219a4695e63715cf922748d743f65
Version: 6fb003e5ae18d8cda4c8a1175d9dd8db12bec049
Version: 8c9e4971e142e2899606a2490b77a1208c1f4638
Version: c33b1cc62ac05c1dbb1cdafe2eb66da01c76ca8d
Version: c33b1cc62ac05c1dbb1cdafe2eb66da01c76ca8d

Linux

Version: 5.12

Show details on NVD website

JSON

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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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