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CVE-2023-38545 Detail

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.


Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  9.8 CRITICAL
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://seclists.org/fulldisclosure/2024/Jan/34
http://seclists.org/fulldisclosure/2024/Jan/37
http://seclists.org/fulldisclosure/2024/Jan/38
https://curl.se/docs/CVE-2023-38545.html Patch  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ Mailing List  Third Party Advisory 
https://security.netapp.com/advisory/ntap-20231027-0009/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20240201-0005/
https://support.apple.com/kb/HT214036
https://support.apple.com/kb/HT214057
https://support.apple.com/kb/HT214058
https://support.apple.com/kb/HT214063
https://www.secpod.com/blog/high-severity-heap-buffer-overflow-vulnerability/ Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST  

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-38545
NVD Published Date:
10/18/2023
NVD Last Modified:
02/01/2024
Source:
HackerOne