Vulnerabilities > CVE-2007-5300 - Buffer Errors vulnerability in Wzdftpd 0.8.0/0.8.2

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
wzdftpd
CWE-119
nessus
exploit available
NVD
Published: 2007-10-09
Updated: 2017-10-19

Summary

Off-by-one error in the do_login_loop function in libwzd-core/wzd_login.c in wzdftpd 0.8.0, 0.8.2, and possibly other versions allows remote attackers to cause a denial of service (daemon crash) via a long USER command that triggers a stack-based buffer overflow. NOTE: some of these details are obtained from third party information.

Vulnerable Configurations

Part Description Count
Application
Wzdftpd
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Exploit-Db

descriptionwzdftpd <= 0.8.0 (USER) Remote Denial of Service Exploit. CVE-2007-5300. Dos exploit for windows platform
fileexploits/windows/dos/4498.pl
idEDB-ID:4498
last seen2016-01-31
modified2007-10-07
platformwindows
port
published2007-10-07
reporterk1tk4t
sourcehttps://www.exploit-db.com/download/4498/
titlewzdftpd <= 0.8.0 USER Remote Denial of Service Exploit
typedos

Nessus

NASL familyDebian Local Security Checks
NASL idDEBIAN_DSA-1452.NASL
description'k1tk4t
last seen2020-06-01
modified2020-06-02
plugin id29861
published2008-01-07
reporterThis script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/29861
titleDebian DSA-1452-1 : wzdftpd - denial of service
code
#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-1452. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(29861);
  script_version("1.17");
  script_cvs_date("Date: 2019/08/02 13:32:21");

  script_cve_id("CVE-2007-5300");
  script_xref(name:"DSA", value:"1452");

  script_name(english:"Debian DSA-1452-1 : wzdftpd - denial of service");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"'k1tk4t' discovered that wzdftpd, a portable, modular, small and
efficient ftp server, did not correctly handle the receipt of long
usernames. This could allow remote users to cause the daemon to exit."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=446192"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2008/dsa-1452"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the wzdftpd package.

For the old stable distribution (sarge), this problem has been fixed
in version 0.5.2-1.1sarge3.

For the stable distribution (etch), this problem has been fixed in
version 0.8.1-2etch1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_cwe_id(119, 189);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:wzdftpd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:4.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/01/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/01/07");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"3.1", prefix:"wzdftpd", reference:"0.5.2-1.1sarge3")) flag++;
if (deb_check(release:"3.1", prefix:"wzdftpd-back-mysql", reference:"0.5.2-1.1sarge3")) flag++;
if (deb_check(release:"3.1", prefix:"wzdftpd-dev", reference:"0.5.2-1.1sarge3")) flag++;
if (deb_check(release:"3.1", prefix:"wzdftpd-mod-perl", reference:"0.5.2-1.1sarge3")) flag++;
if (deb_check(release:"3.1", prefix:"wzdftpd-mod-tcl", reference:"0.5.2-1.1sarge3")) flag++;
if (deb_check(release:"4.0", prefix:"wzdftpd", reference:"0.8.1-2etch1")) flag++;
if (deb_check(release:"4.0", prefix:"wzdftpd-back-mysql", reference:"0.8.1-2etch1")) flag++;
if (deb_check(release:"4.0", prefix:"wzdftpd-back-pgsql", reference:"0.8.1-2etch1")) flag++;
if (deb_check(release:"4.0", prefix:"wzdftpd-dev", reference:"0.8.1-2etch1")) flag++;
if (deb_check(release:"4.0", prefix:"wzdftpd-mod-avahi", reference:"0.8.1-2etch1")) flag++;
if (deb_check(release:"4.0", prefix:"wzdftpd-mod-perl", reference:"0.8.1-2etch1")) flag++;
if (deb_check(release:"4.0", prefix:"wzdftpd-mod-tcl", reference:"0.8.1-2etch1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References