CVE-2021-23134— Linux kernel llcp_sock_bind/connect use-after-free
Quick assessment
Affected
Linux Kernel Linux Kernel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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 5.12.2版本之前存在安全漏洞。该漏洞允许本地攻击者提升特权。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-23134
Vulnerability Information
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Vulnerability Title
Linux kernel llcp_sock_bind/connect use-after-free
Source: CVE Program / CVE List V5
Vulnerability Description
Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability.
Source: 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
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
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 5.12.2版本之前存在安全漏洞。该漏洞允许本地攻击者提升特权。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Linux Kernel | Linux Kernel | unspecified ~ 5.12.4 | - |
|
II. Public POCs for CVE-2021-23134
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-23134 (1)
Vendor Advisories for CVE-2021-23134 (1)
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https://security.netapp.com/advisory/ntap-20210625-0007/ x_refsource_CONFIRM
Mailing List Discussions for CVE-2021-23134 (5)
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https://www.openwall.com/lists/oss-security/2021/05/11/4 x_refsource_MISC
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZYORWNQIHNWRFYRDXBWYWBYM46PDZEN/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QALNQT4LJFVSSA3MWCIECVY4AFPP4X77/ vendor-advisory x_refsource_FEDORA
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-
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-
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V. Comments for CVE-2021-23134
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