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Servers and applications

CVE-2010-4221

Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to execute arbitrary code via vectors involving a TELNET IAC escape character to a (1) FTP or (2) FTPS server.

Severity
High 10.0
Published
9 Nov 2010
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
91% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Memory buffer errors (CWE-119)
Attack
Over the network · No login needed
Attacker can
Read data · Change data · Take it down
CVSS vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
Sources
NVD

Affected software

SoftwareAffected versions
ProFTPDServers and applications · cpe:a:proftpd:proftpd
  • Version 1.3.3
  • Version 1.3.3-rc4
  • Version 1.3.3-rc3
  • Version 1.3.3-rc2
All 15 release lines
  • Version 1.3.2-a
  • Version 1.3.2-b
  • Version 1.3.2-c
  • Version 1.3.2-rc3
  • Version 1.3.2-rc4
  • Version 1.3.2
  • Version 1.3.2-d
  • Version 1.3.2-e
  • Version 1.3.3-a
  • Version 1.3.3-b
  • Version 1.3.3-rc1
  • Version 1.3.3-rc2
  • Version 1.3.3-rc3
  • Version 1.3.3-rc4
  • Version 1.3.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2010-4221
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2010-4221