Vulnerabilities > CVE-2005-2929 - Permissions, Privileges, and Access Controls vulnerability in University of Kansas Lynx 2.8.5/2.8.6/2.8.6Dev13

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
university-of-kansas
CWE-264
nessus
NVD
Published: 2005-11-18
Updated: 2018-10-19

Summary

Lynx 2.8.5, and other versions before 2.8.6dev.15, allows remote attackers to execute arbitrary commands via (1) lynxcgi:, (2) lynxexec, and (3) lynxprog links, which are not properly restricted in the default configuration in some environments.

Vulnerable Configurations

Part Description Count
Application
University_Of_Kansas
3

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200511-09.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200511-09 (Lynx: Arbitrary command execution) iDefense labs discovered a problem within the feature to execute local cgi-bin programs via the
    last seen2020-06-01
    modified2020-06-02
    plugin id20196
    published2005-11-15
    reporterThis script is Copyright (C) 2005-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/20196
    titleGLSA-200511-09 : Lynx: Arbitrary command execution
    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 200511-09.
#
# 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(20196);
  script_version("1.17");
  script_cvs_date("Date: 2019/08/02 13:32:43");

  script_cve_id("CVE-2005-2929");
  script_xref(name:"GLSA", value:"200511-09");

  script_name(english:"GLSA-200511-09 : Lynx: Arbitrary command execution");
  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-200511-09
(Lynx: Arbitrary command execution)

    iDefense labs discovered a problem within the feature to execute
    local cgi-bin programs via the 'lynxcgi:' URI handler. Due to a
    configuration error, the default settings allow websites to specify
    commands to run as the user running Lynx.
  
Impact :

    A remote attacker can entice a user to access a malicious HTTP
    server, causing Lynx to execute arbitrary commands.
  
Workaround :

    Disable 'lynxcgi' links by specifying the following directive in
    lynx.cfg:
    TRUSTED_LYNXCGI:none"
  );
  # http://www.idefense.com/application/poi/display?id=338&type=vulnerabilities
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?3509b5b3"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200511-09"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Lynx users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=www-client/lynx-2.8.5-r2'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2005/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/11/15");
  script_set_attribute(attribute:"vuln_publication_date", value:"2005/11/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2019 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:"www-client/lynx", unaffected:make_list("ge 2.8.5-r2"), vulnerable:make_list("lt 2.8.5-r2"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Lynx");
}
  • NASL familyMandriva Local Security Checks
    NASL idMANDRAKE_MDKSA-2005-211.NASL
    descriptionAn arbitrary command execution vulnerability was discovered in the lynx
    last seen2020-06-01
    modified2020-06-02
    plugin id20444
    published2006-01-15
    reporterThis script is Copyright (C) 2006-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/20444
    titleMandrake Linux Security Advisory : lynx (MDKSA-2005:211)
    code
    #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandrake Linux Security Advisory MDKSA-2005:211. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(20444);
  script_version ("1.15");
  script_cvs_date("Date: 2019/08/02 13:32:48");

  script_cve_id("CVE-2005-2929");
  script_xref(name:"MDKSA", value:"2005:211");

  script_name(english:"Mandrake Linux Security Advisory : lynx (MDKSA-2005:211)");
  script_summary(english:"Checks rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Mandrake Linux host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An arbitrary command execution vulnerability was discovered in the
lynx 'lynxcgi:' URI handler. An attacker could create a web page that
redirects to a malicious URL which could then execute arbitrary code
as the user running lynx.

The updated packages have been patched to address this issue."
  );
  script_set_attribute(attribute:"solution", value:"Update the affected lynx package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lynx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandrakesoft:mandrake_linux:10.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2006");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:mandrakesoft:mandrake_linux:le2005");

  script_set_attribute(attribute:"patch_publication_date", value:"2005/11/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/01/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/rpm-list");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK10.1", reference:"lynx-2.8.5-1.3.101mdk", yank:"mdk")) flag++;

if (rpm_check(release:"MDK10.2", reference:"lynx-2.8.5-1.3.102mdk", yank:"mdk")) flag++;

if (rpm_check(release:"MDK2006.0", reference:"lynx-2.8.5-4.3.20060mdk", yank:"mdk")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyCentOS Local Security Checks
    NASL idCENTOS_RHSA-2005-839.NASL
    descriptionAn updated lynx package that corrects a security flaw is now available. This update has been rated as having critical security impact by the Red Hat Security Response Team. Lynx is a text-based Web browser. An arbitrary command execute bug was found in the lynx
    last seen2020-06-01
    modified2020-06-02
    plugin id21872
    published2006-07-03
    reporterThis script is Copyright (C) 2006-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/21872
    titleCentOS 3 / 4 : lynx (CESA-2005:839)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2005:839 and 
# CentOS Errata and Security Advisory 2005:839 respectively.
#

include("compat.inc");

if (description)
{
  script_id(21872);
  script_version("1.18");
  script_cvs_date("Date: 2019/10/25 13:36:03");

  script_cve_id("CVE-2005-2929");
  script_bugtraq_id(15395);
  script_xref(name:"RHSA", value:"2005:839");

  script_name(english:"CentOS 3 / 4 : lynx (CESA-2005:839)");
  script_summary(english:"Checks rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote CentOS host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An updated lynx package that corrects a security flaw is now
available.

This update has been rated as having critical security impact by the
Red Hat Security Response Team.

Lynx is a text-based Web browser.

An arbitrary command execute bug was found in the lynx 'lynxcgi:' URI
handler. An attacker could create a web page redirecting to a
malicious URL which could execute arbitrary code as the user running
lynx. The Common Vulnerabilities and Exposures project assigned the
name CVE-2005-2929 to this issue.

Users should update to this erratum package, which contains a
backported patch to correct this issue."
  );
  # https://lists.centos.org/pipermail/centos-announce/2005-November/012403.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?02356ab4"
  );
  # https://lists.centos.org/pipermail/centos-announce/2005-November/012404.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?58f50d8d"
  );
  # https://lists.centos.org/pipermail/centos-announce/2005-November/012406.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0851a6ea"
  );
  # https://lists.centos.org/pipermail/centos-announce/2005-November/012407.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?bbc7f616"
  );
  # https://lists.centos.org/pipermail/centos-announce/2005-November/012412.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ed27ff92"
  );
  # https://lists.centos.org/pipermail/centos-announce/2005-November/012413.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?58908d28"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected lynx package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:lynx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:4");

  script_set_attribute(attribute:"vuln_publication_date", value:"2005/11/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2005/11/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/07/03");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

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

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^(3|4)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 3.x / 4.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && "ia64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-3", reference:"lynx-2.8.5-11.2")) flag++;

if (rpm_check(release:"CentOS-4", reference:"lynx-2.8.5-18.2")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "lynx");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2005-1078.NASL
    descriptionThis update fixes CVE-2005-2929 (lynxcgi: URLs). Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id20193
    published2005-11-15
    reporterThis script is Copyright (C) 2005-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/20193
    titleFedora Core 3 : lynx-2.8.5-18.0.2 (2005-1078)
    code
    #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2005-1078.
#

include("compat.inc");

if (description)
{
  script_id(20193);
  script_version ("1.13");
  script_cvs_date("Date: 2019/08/02 13:32:23");

  script_cve_id("CVE-2005-2929");
  script_xref(name:"FEDORA", value:"2005-1078");

  script_name(english:"Fedora Core 3 : lynx-2.8.5-18.0.2 (2005-1078)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora Core host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update fixes CVE-2005-2929 (lynxcgi: URLs).

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  # https://lists.fedoraproject.org/pipermail/announce/2005-November/001578.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e82b6ef9"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected lynx and / or lynx-debuginfo packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:lynx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:lynx-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora_core:3");

  script_set_attribute(attribute:"patch_publication_date", value:"2005/11/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/11/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2019 Tenable Network Security, Inc.");
  script_family(english:"Fedora Local Security Checks");

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

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^3([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 3.x", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC3", reference:"lynx-2.8.5-18.0.2")) flag++;
if (rpm_check(release:"FC3", reference:"lynx-debuginfo-2.8.5-18.0.2")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "lynx / lynx-debuginfo");
}
  • NASL familyRed Hat Local Security Checks
    NASL idREDHAT-RHSA-2005-839.NASL
    descriptionAn updated lynx package that corrects a security flaw is now available. This update has been rated as having critical security impact by the Red Hat Security Response Team. Lynx is a text-based Web browser. An arbitrary command execute bug was found in the lynx
    last seen2020-06-01
    modified2020-06-02
    plugin id20208
    published2005-11-15
    reporterThis script is Copyright (C) 2005-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/20208
    titleRHEL 2.1 / 3 / 4 : lynx (RHSA-2005:839)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2005:839. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(20208);
  script_version ("1.23");
  script_cvs_date("Date: 2019/10/25 13:36:11");

  script_cve_id("CVE-2005-2929");
  script_bugtraq_id(15395);
  script_xref(name:"RHSA", value:"2005:839");

  script_name(english:"RHEL 2.1 / 3 / 4 : lynx (RHSA-2005:839)");
  script_summary(english:"Checks the rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An updated lynx package that corrects a security flaw is now
available.

This update has been rated as having critical security impact by the
Red Hat Security Response Team.

Lynx is a text-based Web browser.

An arbitrary command execute bug was found in the lynx 'lynxcgi:' URI
handler. An attacker could create a web page redirecting to a
malicious URL which could execute arbitrary code as the user running
lynx. The Common Vulnerabilities and Exposures project assigned the
name CVE-2005-2929 to this issue.

Users should update to this erratum package, which contains a
backported patch to correct this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2005-2929"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2005:839"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected lynx package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:lynx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:2.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");

  script_set_attribute(attribute:"vuln_publication_date", value:"2005/11/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2005/11/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/11/15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^(2\.1|3|4)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 2.1 / 3.x / 4.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2005:839";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"lynx-2.8.4-18.1.2")) flag++;

  if (rpm_check(release:"RHEL3", reference:"lynx-2.8.5-11.2")) flag++;

  if (rpm_check(release:"RHEL4", reference:"lynx-2.8.5-18.2")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "lynx");
  }
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2005-1079.NASL
    descriptionThis update fixes CVE-2005-2929 (lynxcgi: URLs). Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id20194
    published2005-11-15
    reporterThis script is Copyright (C) 2005-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/20194
    titleFedora Core 4 : lynx-2.8.5-23.2 (2005-1079)
    code
    #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2005-1079.
#

include("compat.inc");

if (description)
{
  script_id(20194);
  script_version ("1.13");
  script_cvs_date("Date: 2019/08/02 13:32:23");

  script_cve_id("CVE-2005-2929");
  script_xref(name:"FEDORA", value:"2005-1079");

  script_name(english:"Fedora Core 4 : lynx-2.8.5-23.2 (2005-1079)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora Core host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update fixes CVE-2005-2929 (lynxcgi: URLs).

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  # https://lists.fedoraproject.org/pipermail/announce/2005-November/001579.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?64ea6562"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected lynx and / or lynx-debuginfo packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:lynx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:lynx-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora_core:4");

  script_set_attribute(attribute:"patch_publication_date", value:"2005/11/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/11/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2019 Tenable Network Security, Inc.");
  script_family(english:"Fedora Local Security Checks");

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

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^4([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 4.x", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC4", reference:"lynx-2.8.5-23.2")) flag++;
if (rpm_check(release:"FC4", reference:"lynx-debuginfo-2.8.5-23.2")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "lynx / lynx-debuginfo");
}
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200909-15.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200909-15 (Lynx: Arbitrary command execution) Clint Ruoho reported that the fix for CVE-2005-2929 (GLSA 200511-09) only disabled the lynxcgi:// handler when not using the advanced mode. Impact : A remote attacker can entice a user to access a malicious HTTP server, causing Lynx to execute arbitrary commands. NOTE: The advanced mode is not enabled by default. Successful exploitation requires the
    last seen2020-06-01
    modified2020-06-02
    plugin id40962
    published2009-09-14
    reporterThis script is Copyright (C) 2009-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/40962
    titleGLSA-200909-15 : Lynx: Arbitrary command execution
    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 200909-15.
#
# The advisory text is Copyright (C) 2001-2018 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(40962);
  script_version("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:45");

  script_cve_id("CVE-2005-2929", "CVE-2008-4690");
  script_bugtraq_id(15395);
  script_xref(name:"GLSA", value:"200909-15");

  script_name(english:"GLSA-200909-15 : Lynx: Arbitrary command execution");
  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-200909-15
(Lynx: Arbitrary command execution)

    Clint Ruoho reported that the fix for CVE-2005-2929 (GLSA 200511-09)
    only disabled the lynxcgi:// handler when not using the advanced mode.
  
Impact :

    A remote attacker can entice a user to access a malicious HTTP server,
    causing Lynx to execute arbitrary commands. NOTE: The advanced mode is
    not enabled by default. Successful exploitation requires the
    'lynxcgi://' protocol to be registered with lynx on the victim's
    system.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200511-09"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200909-15"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Lynx users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=www-client/lynx-2.8.6-r4'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:lynx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2009/09/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/09/14");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2009-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  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:"www-client/lynx", unaffected:make_list("ge 2.8.6-r4"), vulnerable:make_list("lt 2.8.6-r4"))) flag++;

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

Oval

accepted2013-04-29T04:21:32.013-04:00
classvulnerability
contributors
  • nameAharon Chernin
    organizationSCAP.com, LLC
  • nameDragos Prisaca
    organizationG2, Inc.
definition_extensions
  • commentThe operating system installed on the system is Red Hat Enterprise Linux 3
    ovaloval:org.mitre.oval:def:11782
  • commentCentOS Linux 3.x
    ovaloval:org.mitre.oval:def:16651
  • commentThe operating system installed on the system is Red Hat Enterprise Linux 4
    ovaloval:org.mitre.oval:def:11831
  • commentCentOS Linux 4.x
    ovaloval:org.mitre.oval:def:16636
  • commentOracle Linux 4.x
    ovaloval:org.mitre.oval:def:15990
descriptionLynx 2.8.5, and other versions before 2.8.6dev.15, allows remote attackers to execute arbitrary commands via (1) lynxcgi:, (2) lynxexec, and (3) lynxprog links, which are not properly restricted in the default configuration in some environments.
familyunix
idoval:org.mitre.oval:def:9712
statusaccepted
submitted2010-07-09T03:56:16-04:00
titleLynx 2.8.5, and other versions before 2.8.6dev.15, allows remote attackers to execute arbitrary commands via (1) lynxcgi:, (2) lynxexec, and (3) lynxprog links, which are not properly restricted in the default configuration in some environments.
version26

Redhat

advisories
rhsa
idRHSA-2005:839
rpms
  • lynx-0:2.8.5-11.2
  • lynx-0:2.8.5-18.2
  • lynx-debuginfo-0:2.8.5-11.2
  • lynx-debuginfo-0:2.8.5-18.2

Statements

contributorMark J Cox
lastmodified2007-03-14
organizationRed Hat
statementRed Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.

References