CVE-2023-38545
Quick assessment
Affected
curl curl
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
curl是一款用于从服务器传输数据或向服务器传输数据的工具。 curl 7.69.0至8.3.0版本存在安全漏洞，该漏洞源于SOCKS5存在堆栈溢出漏洞。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-38545
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy
handshake.
When curl is asked to pass along the host name to the SOCKS5 proxy to allow
that to resolve the address instead of it getting done by curl itself, the
maximum length that host name can be is 255 bytes.
If the host name is detected to be longer, curl switches to local name
resolving and instead passes on the resolved address only. Due to this bug,
the local variable that means "let the host resolve the name" could get the
wrong value during a slow SOCKS5 handshake, and contrary to the intention,
copy the too long host name to the target buffer instead of copying just the
resolved address there.
The target buffer being a heap based buffer, and the host name coming from the
URL that curl has been told to operate with.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
curl 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是一款用于从服务器传输数据或向服务器传输数据的工具。 curl 7.69.0至8.3.0版本存在安全漏洞，该漏洞源于SOCKS5存在堆栈溢出漏洞。
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
II. Public POCs for CVE-2023-38545
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | Simple PoC causing overflow | https://github.com/UTsweetyfish/CVE-2023-38545 | POC Details |
| 2 | 😄 CVE-2023-38545堆溢出的POC和分析文章 | https://github.com/imfht/CVE-2023-38545 | POC Details |
| 3 | Simple PoC causing overflow | https://github.com/fatmo666/CVE-2023-38545-libcurl-SOCKS5-heap-buffer-overflow | POC Details |
| 4 | Dockerfile containing all the necessary setup files to demo the exploit | https://github.com/vanigori/CVE-2023-38545-sample | POC Details |
| 5 | CVE-2023-38545 POC for the curl command line tool | https://github.com/dbrugman/CVE-2023-38545-POC | POC Details |
| 6 | A proof of concept for testing CVE-2023-38545 against local curl | https://github.com/bcdannyboy/CVE-2023-38545 | POC Details |
| 7 | socks5 heap buffer overflow | https://github.com/d0rb/CVE-2023-38545 | POC Details |
| 8 | None | https://github.com/Yang-Shun-Yu/CVE-2023-38545 | POC Details |
| 9 | Network Security Project CVE-2023-38545 | https://github.com/nphuang/NS-Project-2024-Spring | POC Details |
AI-Generated POC
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Vendor Advisories for CVE-2023-38545 (6)
Mailing List Discussions for CVE-2023-38545 (4)
Security Blog Posts for CVE-2023-38545 (1)
Other References for CVE-2023-38545 (2)
IV. Related Vulnerabilities
V. Comments for CVE-2023-38545
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