Vulnerability Report

CVE-2023-38546

Title: Haxx Libcurl

Other

Proof Of Concept

No public PoC currently indexed for CVE-2023-38546.

CWE Category NVD-CWE-noinfo
Published Date Oct 18, 2023
Modified Date May 12, 2026
Exploit Status Not Found
Score 3.7 CVSS v3.1
Exploit Probability (EPSS)
0.44%

Vulnerability Summary

CVE-2023-38546: This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met. libcurl performs transfers. In its API, an application creates "easy handles" that are the individual handles for single transfers. libcurl provides a function call that duplicates en easy handle called [curl_easy_duphandle](https://curl.se/libcurl/c/curl_easy_duphandle.html). If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as `none` (using the four ASCII letters, no quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.

Impacted Vendors

H
haxx 1
L
libcurl 1

Reference Links

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-2023-38546.html https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868 https://lists.fedoraproject.org/archives/list/[email protected]/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ https://support.apple.com/kb/HT214036 https://support.apple.com/kb/HT214057 https://support.apple.com/kb/HT214058 https://support.apple.com/kb/HT214063 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-2023-38546.html https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868 https://lists.debian.org/debian-lts-announce/2023/10/msg00016.html https://lists.fedoraproject.org/archives/list/[email protected]/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ https://support.apple.com/kb/HT214036 https://support.apple.com/kb/HT214057 https://support.apple.com/kb/HT214058 https://support.apple.com/kb/HT214063
CVSS v3.1
Source Entity [email protected]
Severity LOW
3.7
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-38546 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Stack

No specific products linked.