Vulnerabilities > CVE-2007-1742 - Unspecified vulnerability in Apache Http Server 2.2.3

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN
apache
nessus

Summary

suexec in Apache HTTP Server (httpd) 2.2.3 uses a partial comparison for verifying whether the current directory is within the document root, which might allow local users to perform unauthorized operations on incorrect directories, as demonstrated using "html_backup" and "htmleditor" under an "html" directory. NOTE: the researcher, who is reliable, claims that the vendor disputes the issue because "the attacks described rely on an insecure server configuration" in which the user "has write access to the document root."

Vulnerable Configurations

Part Description Count
Application
Apache
1

Nessus

NASL familyWeb Servers
NASL idAPACHE_MOD_SUEXEC.NASL
descriptionThe remote host appears to be running Apache and is potentially affected by the following vulnerabilities: - Multiple race conditions exist in suexec between the validation and usage of directories and files. Under certain conditions local users are able to escalate privileges and execute arbitrary code through the renaming of directories or symlink attacks. (CVE-2007-1741) - Apache
last seen2020-06-01
modified2020-06-02
plugin id17693
published2011-11-18
reporterThis script is Copyright (C) 2011-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/17693
titleApache mod_suexec Multiple Privilege Escalation Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if(description)
{
  script_id(17693);
  script_version("1.8");
  script_cvs_date("Date: 2018/11/15 20:50:25");

  script_cve_id("CVE-2007-1741", "CVE-2007-1742", "CVE-2007-1743");
  script_bugtraq_id(23438);

  script_name(english:"Apache mod_suexec Multiple Privilege Escalation Vulnerabilities");
  script_summary(english:"Checks for Apache");

  script_set_attribute(attribute:"synopsis", value:
"The remote Apache server is vulnerable to multiple privilege
escalation attacks.");
  script_set_attribute(attribute:"description", value:
"The remote host appears to be running Apache and is potentially
affected by the following vulnerabilities:

  - Multiple race conditions exist in suexec between the
    validation and usage of directories and files. Under
    certain conditions local users are able to escalate
    privileges and execute arbitrary code through the
    renaming of directories or symlink attacks.
    (CVE-2007-1741)

  - Apache's suexec module only performs partial
    comparisons on paths, which could result in privilege
    escalation. (CVE-2007-1742)

  - Apache's suexec module does not properly verify user
    and group IDs on the command line. When the '/proc'
    filesystem is mounted, a local user can utilize suexec
    to escalate privileges. (CVE-2007-1743)

Note that this plugin only checks for the presence of Apache, and does
not actually check the configuration.");

  script_set_attribute(attribute:"solution", value:
"Disable suexec or disallow users from writing to the document root.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"see_also", value:"https://marc.info/?l=apache-httpd-dev&m=117511568709063&w=2");
  script_set_attribute(attribute:"see_also", value:"https://marc.info/?l=apache-httpd-dev&m=117511834512138&w=2");
  script_set_attribute(attribute:"vuln_publication_date", value:"2007/04/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/11/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:http_server");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);

  script_copyright(english:"This script is Copyright (C) 2011-2018 Tenable Network Security, Inc.");
  script_family(english:"Web Servers");

  script_dependencie("apache_http_version.nasl");
  script_require_keys("installed_sw/Apache", "Settings/PCI_DSS");
  script_require_ports("Services/www", 80);
  exit(0);
}

include("global_settings.inc");
include("http.inc");
include("misc_func.inc");
include("audit.inc");
include("install_func.inc");

# Only PCI considers this an issue.
if (!get_kb_item("Settings/PCI_DSS")) exit(0, "PCI-DSS compliance checking is not enabled.");

get_install_count(app_name:"Apache", exit_if_zero:TRUE);
port = get_http_port(default:80);
install = get_single_install(app_name:"Apache", port:port, exit_if_unknown_ver:TRUE);

# All versions are vulnerable.
source = get_kb_item_or_exit("www/apache/"+port+"/pristine/source", exit_code:1);
version = get_kb_item_or_exit("www/apache/"+port+"/pristine/version", exit_code:1);

if (report_verbosity > 0)
{
  report =
    '\n  Version source    : ' + source +
    '\n  Installed version : ' + version +
    '\n';
  security_warning(port:port, extra:report);
}
else security_warning(port);

Statements

contributorMark J Cox
lastmodified2007-04-19
organizationRed Hat
statementThese attacks are reliant on an insecure configuration of the server - that the user the server runs as has write access to the document root. The suexec security model is not intented to protect against privilege escalation in such a configuration