Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.
History

Tue, 21 Oct 2025 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Warmcat
Warmcat libwebsockets
Vendors & Products Warmcat
Warmcat libwebsockets

Mon, 20 Oct 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 20 Oct 2025 14:00:00 +0000

Type Values Removed Values Added
Description Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.
Title Stack-based Buffer Overflow in libwebsockets DNS response parsing
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 7.5, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Nozomi

Published: 2025-10-20T13:51:17.328Z

Updated: 2025-10-20T14:00:37.720Z

Reserved: 2025-10-13T09:56:39.308Z

Link: CVE-2025-11678

cve-icon Vulnrichment

Updated: 2025-10-20T14:00:24.521Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-20T14:15:40.137

Modified: 2025-10-21T19:31:25.450

Link: CVE-2025-11678

cve-icon Redhat

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