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Fencer Vulns
critical 9.8

CVE-2002-1816 json

Off-by-one buffer overflow in the sock_gets function in sockhelp.c for ATPhttpd 0.4b and earlier allows remote attackers to execute arbitra…

published 2002-12-31 23 y ago modified 2026-06-16 4 mo ago also EUVD-2002-1795

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
9.0%
EPSS 9.0% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

Off-by-one buffer overflow in the sock_gets function in sockhelp.c for ATPhttpd 0.4b and earlier allows remote attackers to execute arbitrary code via a long HTTP GET request.

Patch / fix

Timeline

  1. First public exploit (EDB-21936)
  2. Published

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

8.95% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-21936 ATP HTTPd 0.4 - Single Byte Buffer Overflow remote, 2002-10-05
  • securityfocus.com http://www.securityfocus.com/bid/5956 referenced PoC, tagged "exploit" by a source, unverified
  • archives.neohapsis.com http://archives.neohapsis.com/archives/bugtraq/2002-10/0187.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/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.