CVE-2025-5399
"Libcurl WebSocket DoS Vulnerability"
Description
Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop. There is no other way for the application to escape or exit this loop other than killing the thread/process. This might be used to DoS libcurl-using application.
INFO
Published Date :
June 7, 2025, 8:15 a.m.
Last Modified :
June 7, 2025, 8:15 a.m.
Source :
2499f714-1537-4658-8207-48ae4bb9eae9
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-5399.
| URL | Resource |
|---|---|
| https://curl.se/docs/CVE-2025-5399.html | |
| https://curl.se/docs/CVE-2025-5399.json | |
| https://hackerone.com/reports/3168039 | |
| http://www.openwall.com/lists/oss-security/2025/06/04/2 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-5399 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-5399 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 2499f714-1537-4658-8207-48ae4bb9eae9
Jun. 07, 2025
Action Type Old Value New Value Added Description Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop. There is no other way for the application to escape or exit this loop other than killing the thread/process. This might be used to DoS libcurl-using application. Added Reference https://curl.se/docs/CVE-2025-5399.html Added Reference https://curl.se/docs/CVE-2025-5399.json Added Reference https://hackerone.com/reports/3168039 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 07, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/06/04/2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-5399 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-5399
weaknesses.