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    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.

    Published:Nov 9, 2010
    Last Modified:Apr 11, 2025
    EPS:Nov 9, 2010
    EPSS Score:0.91953
    CVSS Score:10

    Affected Products

    Vendor
    Proftpd
    Product
    Proftpd

    Exploits

    http://bugs.proftpd.org/show_bug.cgi?id=3521http://www.securityfocus.com/bid/44562http://bugs.proftpd.org/show_bug.cgi?id=3521http://www.securityfocus.com/bid/44562https://www.exploit-db.com/exploits/16878https://github.com/M41doror/cve-2010-4221https://github.com/Mafiosohack/Offensive-lab-2https://www.exploit-db.com/exploits/15449https://www.exploit-db.com/exploits/16851

    Related CVEs

    CVE-2026-63091 (CVSS 7.1) — ProFTPD before 1.3.9c and 1.3.10rc3 contains a signed integer overflow vulnerability in the mod_sftp module's …
    CVE-2026-63090 (CVSS 8.7) — ProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module…
    CVE-2026-53994 (CVSS 7.7) — ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user. The fxp_packet…
    CVE-2026-35025 (CVSS 8.6) — ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated…
    CVE-2026-44331 (CVSS 8.1) — In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in contri…
    CVE-2026-42167 (CVSS 8.1) — mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenario…
    CVE-2021-47865 (CVSS 8.7) — ProFTPD 1.3.7a contains a denial of service vulnerability that allows attackers to overwhelm the server by cre…
    CVE-2010-20103 (CVSS 9.3) — A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 2…
    CVE-2024-48651 (CVSS 7.5) — In ProFTPD through 1.3.8b before cec01cc, supplemental group inheritance grants unintended access to GID 0 bec…
    CVE-2023-51713 (CVSS 7.5) — make_ftp_cmd in main.c in ProFTPD before 1.3.8a has a one-byte out-of-bounds read, and daemon crash, because o…

    References

    http://bugs.proftpd.org/show_bug.cgi?id=3521
    http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050687.html
    http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050703.html
    http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050726.html
    http://secunia.com/advisories/42052
    http://secunia.com/advisories/42217
    http://www.mandriva.com/security/advisories?name=MDVSA-2010:227
    http://www.proftpd.org/docs/NEWS-1.3.3c
    http://www.securityfocus.com/bid/44562
    http://www.vupen.com/english/advisories/2010/2941
    http://www.vupen.com/english/advisories/2010/2959
    http://www.vupen.com/english/advisories/2010/2962
    http://www.zerodayinitiative.com/advisories/ZDI-10-229/
    http://bugs.proftpd.org/show_bug.cgi?id=3521
    http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050687.html
    http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050703.html
    http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050726.html
    http://secunia.com/advisories/42052
    http://secunia.com/advisories/42217
    http://www.mandriva.com/security/advisories?name=MDVSA-2010:227
    http://www.proftpd.org/docs/NEWS-1.3.3c
    http://www.securityfocus.com/bid/44562
    http://www.vupen.com/english/advisories/2010/2941
    http://www.vupen.com/english/advisories/2010/2959
    http://www.vupen.com/english/advisories/2010/2962
    http://www.zerodayinitiative.com/advisories/ZDI-10-229/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High