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Fencer Vulns
medium 5.0

CVE-2004-1940 json

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 la…

published 2004-12-31 21 y ago modified 2026-06-16 4 mo ago also EUVD-2004-1932

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

Timeline

  1. First public exploit (EDB-24011)
  2. Published

Exploit prediction

4.15% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-24011 KPhone 2.x/3.x/4.0.1 - Malformed STUN Packet Denial of Service dos, 2004-04-08
  • securityfocus.com http://www.securityfocus.com/bid/10159 referenced PoC, tagged "exploit" by a source, unverified
  • securiteam.com http://www.securiteam.com/unixfocus/5PP0B1FCLY.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.