CVE-2021-22901
Quick assessment
Affected
n/a https://github.com/curl/curl
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
HAXX Haxx curl是瑞典Haxx（HAXX）公司的一套利用URL语法在命令行下工作的文件传输工具。该工具支持文件上传和下载，并包含一个用于程序开发的libcurl（客户端URL传输库）。 Haxx curl 存在资源管理错误漏洞，该漏洞使用OpenSSL库作为TLS后端的curl版本可以在OpenSSL库执行TLS会话重新协商后使用已释放的内存。恶意的TLS服务器可能会利用这个缺陷来崩溃，或者使用curl库以客户端应用程序的特权执行任意代码。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-22901
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Haxx curl 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HAXX Haxx curl是瑞典Haxx（HAXX）公司的一套利用URL语法在命令行下工作的文件传输工具。该工具支持文件上传和下载，并包含一个用于程序开发的libcurl（客户端URL传输库）。 Haxx curl 存在资源管理错误漏洞，该漏洞使用OpenSSL库作为TLS后端的curl版本可以在OpenSSL库执行TLS会话重新协商后使用已释放的内存。恶意的TLS服务器可能会利用这个缺陷来崩溃，或者使用curl库以客户端应用程序的特权执行任意代码。
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 |
|---|---|---|---|---|
| - | https://github.com/curl/curl | 7.75.0 through 7.76.1 | - |
|
II. Public POCs for CVE-2021-22901
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-22901 (1)
Vendor Advisories for CVE-2021-22901 (7)
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https://www.oracle.com/security-alerts/cpujan2022.html x_refsource_MISC
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https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf x_refsource_CONFIRM
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https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
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https://security.netapp.com/advisory/ntap-20210727-0007/ x_refsource_CONFIRM
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https://security.netapp.com/advisory/ntap-20210723-0001/ x_refsource_CONFIRM
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https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
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https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf x_refsource_CONFIRM
Other References for CVE-2021-22901 (2)
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https://hackerone.com/reports/1180380 x_refsource_MISC
-
https://curl.se/docs/CVE-2021-22901.html x_refsource_MISC
Same Patch Batch · n/a · 2021-06-11 · 79 CVEs total
| CVE-2021-34679 | 10.0 CRITICAL | Thycotic Password Reset Server 信息泄露漏洞 |
| CVE-2021-21808 | Accusoft ImageGear 缓冲区错误漏洞 | |
| CVE-2021-0472 | Google Android 安全漏洞 | |
| CVE-2021-32930 | Advantech Iview 访问控制错误漏洞 | |
| CVE-2021-32932 | Advantech Iview SQL注入漏洞 | |
| CVE-2021-21795 | Accusoft ImageGear 缓冲区错误漏洞 | |
| CVE-2021-21833 | Accusoft ImageGear 输入验证错误漏洞 | |
| CVE-2021-20591 | Mitsubishi Electric MELSEC iQ-R series 资源管理错误漏洞 | |
| CVE-2021-22906 | Nextcloud 资源管理错误漏洞 | |
| CVE-2021-22915 | Nextcloud server 处理逻辑错误漏洞 | |
| CVE-2021-21824 | Accusoft ImageGear 缓冲区错误漏洞 | |
| CVE-2021-27408 | Mmemed Welch Allyn Connex 缓冲区错误漏洞 | |
| CVE-2021-27410 | Mmemed Welch Allyn Connex 缓冲区错误漏洞 | |
| CVE-2019-9475 | Google Android 安全漏洞 | |
| CVE-2021-0466 | Google Android 安全特征问题漏洞 | |
| CVE-2021-0476 | Google Android 资源管理错误漏洞 | |
| CVE-2021-0481 | Google Android 输入验证错误漏洞 | |
| CVE-2021-0482 | Google Android 资源管理错误漏洞 | |
| CVE-2021-0484 | Google Android 信息泄露漏洞 | |
| CVE-2021-22905 | Nextcloud 信息泄露漏洞 |
Showing top 20 of 79 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-22901
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