CVE-2004-1940

Exp

sipclient.cpp in KPhone 4.0.1 and earlier allows remote attackers to cause a denial of service (crash) via a STUN response packet with a large attrLen value that causes an out-of-bounds read.

Published: 2004-12-31 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-1940 is rated High Exploit Risk (61.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.93%, 91th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2004-1940

EDB-ID Source Kind Published Link
24011 exploit_db edb 2004-04-08 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2004-1940

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-19 12.95% 6.93% -6.01%
2 2025-06-09 11.43% 12.95% +1.52%
3 2025-03-30 — 11.43% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-1940

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2004-1940

Affected software / configurations for CVE-2004-1940

Vendor Product Version Raw CPE
wirlab kphone <= 4.0.1 cpe:2.3:a:wirlab:kphone:*:*:*:*:*:*:*:*

References for CVE-2004-1940

URL Tags
http://marc.info/?l=bugtraq&m=108244325924859&w=2 Mailing List Third Party Advisory
http://www.securiteam.com/unixfocus/5PP0B1FCLY.html Broken Link Exploit
http://www.securityfocus.com/bid/10159 Broken Link Exploit Patch Third Party Advisory VDB Entry
http://www.wirlab.net/kphone/changes-4.0.2.html Broken Link Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/15874 Broken Link VDB Entry
cvelogic Threat Intelligence