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Fencer Vulns
medium 5.0

CVE-2009-3704 json

ZoIPer 2.22, and possibly other versions before 2.24 Library 5324, allows remote attackers to cause a denial of service (crash) via a SIP I…

published 2009-10-16 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3677

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.1%
EPSS 8.1% chance of exploitation in 30 days, percentile 94%
public exploits
1
Exploit-DB

Summary

ZoIPer 2.22, and possibly other versions before 2.24 Library 5324, allows remote attackers to cause a denial of service (crash) via a SIP INVITE request with an empty Call-Info header.

Timeline

  1. First public exploit (EDB-9987)
  2. Published

Exploit prediction

8.14% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-9987 ZoIPer 2.22 - Call-Info Remote Denial of Service dos, 2009-10-14
  • packetstormsecurity.org http://packetstormsecurity.org/0910-exploits/zoiper_dos.py.txt 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

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.