Vulnerabilities > CVE-2007-5622 - Resource Management Errors vulnerability in 3Proxy

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
3proxy
CWE-399
nessus

Summary

Double free vulnerability in the ftpprchild function in ftppr in 3proxy 0.5 through 0.5.3i allows remote attackers to cause a denial of service (daemon crash) via multiple OPEN commands to the FTP proxy.

Common Weakness Enumeration (CWE)

Nessus

NASL familyGentoo Local Security Checks
NASL idGENTOO_GLSA-200711-13.NASL
descriptionThe remote host is affected by the vulnerability described in GLSA-200711-13 (3proxy: Denial of Service) 3proxy contains a double free vulnerability in the ftpprchild() function, which frees param->hostname and calls the parsehostname() function, which in turn attempts to free param->hostname again. Impact : A remote attacker could send a specially crafted request to the proxy, possibly resulting in a Denial of Service. Under typical configuration, the scope of this vulnerability is limited to the local network. Workaround : There is no known workaround at this time.
last seen2020-06-01
modified2020-06-02
plugin id27848
published2007-11-09
reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/27848
titleGLSA-200711-13 : 3proxy: 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 Gentoo Linux Security Advisory GLSA 200711-13.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(27848);
  script_version("1.13");
  script_cvs_date("Date: 2019/08/02 13:32:44");

  script_cve_id("CVE-2007-5622");
  script_xref(name:"GLSA", value:"200711-13");

  script_name(english:"GLSA-200711-13 : 3proxy: Denial of Service");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200711-13
(3proxy: Denial of Service)

    3proxy contains a double free vulnerability in the ftpprchild()
    function, which frees param->hostname and calls the parsehostname()
    function, which in turn attempts to free param->hostname again.
  
Impact :

    A remote attacker could send a specially crafted request to the proxy,
    possibly resulting in a Denial of Service. Under typical configuration,
    the scope of this vulnerability is limited to the local network.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200711-13"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All 3proxy users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-proxy/3proxy-0.5.3j'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_cwe_id(399);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:3proxy");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/11/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/11/09");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2019 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"net-proxy/3proxy", unaffected:make_list("ge 0.5.3j"), vulnerable:make_list("lt 0.5.3j"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "3proxy");
}

Seebug

bulletinFamilyexploit
descriptionBUGTRAQ ID: 26180 CVE(CAN) ID: CVE-2007-5622 3Proxy是一款小型的代理软件。 3Proxy在处理连接时存在漏洞,远程攻击者可能利用此漏洞控制服务器。 3Proxy的ftpprchild()函数中存在双重释放漏洞: ... if (!strncasecmp((char *)buf, &quot;OPEN &quot;, 5)){ if(param-&gt;hostname) myfree(param-&gt;hostname); &lt;--first free if(parsehostname((char *)buf+5, param, 21)){RETURN(803);} the parsehostname will free param-&gt;hostname again. int parsehostname(char *hostname, struct clientparam *param, unsigned short port){ char *sp; if(!hostname || !*hostname)return 1; if ( (sp = strchr(hostname, ':')) ) *sp = 0; if(param-&gt;hostname) myfree(param-&gt;hostname); &lt;-- double free 远程攻击者可以通过向FTP代码模块多次发送OPEN命令触发这个漏洞,导致服务不稳定或崩溃。 3Proxy 3proxy 0.5 - 0.5.3i 3Proxy ------ 目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载: <a href="http://3proxy.ru/download/" target="_blank">http://3proxy.ru/download/</a>
idSSV:2337
last seen2017-11-19
modified2007-10-26
published2007-10-26
reporterRoot
title3Proxy FTP代理模块OPEN命令双重释放漏洞