Executive Summary

Summary
Title Lynx: Arbitrary command execution
Informations
Name GLSA-200909-15 First vendor Publication 2009-09-12
Vendor Gentoo Last vendor Modification 2009-09-12
Severity (Vendor) Normal Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 10 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

An incomplete fix for an issue related to the Lynx URL handler might allow for the remote execution of arbitrary commands.

Background

Lynx is a fully-featured WWW client for users running cursor-addressable, character-cell display devices such as vt100
terminals and terminal emulators.

Description

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.

Resolution

All Lynx users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose =www-client/lynx-2.8.6-r4

References

[ 1 ] CVE-2005-2929 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2929
[ 2 ] CVE-2008-4690 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4690
[ 3 ] GLSA 200511-09 : http://www.gentoo.org/security/en/glsa/glsa-200511-09.xml

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200909-15.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-200909-15.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-264 Permissions, Privileges, and Access Controls

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:11204
 
Oval ID: oval:org.mitre.oval:def:11204
Title: lynx 2.8.6dev.15 and earlier, when advanced mode is enabled and lynx is configured as a URL handler, allows remote attackers to execute arbitrary commands via a crafted lynxcgi: URL, a related issue to CVE-2005-2929. NOTE: this might only be a vulnerability in limited deployments that have defined a lynxcgi: handler.
Description: lynx 2.8.6dev.15 and earlier, when advanced mode is enabled and lynx is configured as a URL handler, allows remote attackers to execute arbitrary commands via a crafted lynxcgi: URL, a related issue to CVE-2005-2929. NOTE: this might only be a vulnerability in limited deployments that have defined a lynxcgi: handler.
Family: unix Class: vulnerability
Reference(s): CVE-2008-4690
 Version: 5
Platform(s): Red Hat Enterprise Linux 3
CentOS Linux 3
Red Hat Enterprise Linux 4
CentOS Linux 4
Oracle Linux 4
Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:28964
 
Oval ID: oval:org.mitre.oval:def:28964
Title: RHSA-2008:0965 -- lynx security update (Important)
Description: An updated lynx package that corrects two security issues is now available for Red Hat Enterprise Linux 2.1, 3, 4, and 5. This update has been rated as having important security impact by the Red Hat Security Response Team. Lynx is a text-based Web browser.
Family: unix Class: patch
Reference(s): RHSA-2008:0965
CESA-2008:0965-CentOS 5
CESA-2008:0965-CentOS 3
CESA-2008:0965-CentOS 2
CVE-2006-7234
CVE-2008-4690
 Version: 3
Platform(s): Red Hat Enterprise Linux 3
Red Hat Enterprise Linux 4
Red Hat Enterprise Linux 5
CentOS Linux 5
CentOS Linux 3
CentOS Linux 2
 Product(s): lynx
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:9712
 
Oval ID: oval:org.mitre.oval:def:9712
Title: 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.
Description: 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.
Family: unix Class: vulnerability
Reference(s): CVE-2005-2929
 Version: 5
Platform(s): Red Hat Enterprise Linux 3
CentOS Linux 3
Red Hat Enterprise Linux 4
CentOS Linux 4
Oracle Linux 4
 Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 180
Application 3

OpenVAS Exploits

Date Description
2009-09-15 Name : Gentoo Security Advisory GLSA 200909-15 (lynx)
File : nvt/glsa_200909_15.nasl
2009-04-09 Name : Mandriva Update for lynx MDVSA-2008:218 (lynx)
File : nvt/gb_mandriva_MDVSA_2008_218.nasl
2009-03-06 Name : RedHat Update for lynx RHSA-2008:0965-01
File : nvt/gb_RHSA-2008_0965-01_lynx.nasl
2009-02-27 Name : CentOS Update for lynx CESA-2008:0965-01 centos2 i386
File : nvt/gb_CESA-2008_0965-01_lynx_centos2_i386.nasl
2009-02-27 Name : CentOS Update for lynx CESA-2008:0965 centos3 i386
File : nvt/gb_CESA-2008_0965_lynx_centos3_i386.nasl
2009-02-27 Name : CentOS Update for lynx CESA-2008:0965 centos3 x86_64
File : nvt/gb_CESA-2008_0965_lynx_centos3_x86_64.nasl
2009-02-27 Name : CentOS Update for lynx CESA-2008:0965 centos4 i386
File : nvt/gb_CESA-2008_0965_lynx_centos4_i386.nasl
2009-02-27 Name : CentOS Update for lynx CESA-2008:0965 centos4 x86_64
File : nvt/gb_CESA-2008_0965_lynx_centos4_x86_64.nasl
2009-02-17 Name : Fedora Update for lynx FEDORA-2008-9550
File : nvt/gb_fedora_2008_9550_lynx_fc9.nasl
2009-02-17 Name : Fedora Update for lynx FEDORA-2008-9597
File : nvt/gb_fedora_2008_9597_lynx_fc8.nasl
2009-02-17 Name : Fedora Update for lynx FEDORA-2008-9952
File : nvt/gb_fedora_2008_9952_lynx_fc10.nasl
2009-01-20 Name : SuSE Security Summary SUSE-SR:2009:002
File : nvt/suse_sr_2009_002.nasl
2008-09-24 Name : Gentoo Security Advisory GLSA 200511-09 (lynx)
File : nvt/glsa_200511_09.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
49479 Lynx Crafted lynxcgi: URL Handling Arbitrary Remote Code Execution
20814 Lynx lynxcgi: URI Handler Arbitrary Command Execution

Nessus® Vulnerability Scanner

Date Description
2013-07-12 Name : The remote Oracle Linux host is missing a security update.
File : oraclelinux_ELSA-2008-0965.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing a security update.
File : sl_20081027_lynx_on_SL3_x.nasl - Type : ACT_GATHER_INFO
2009-09-14 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200909-15.nasl - Type : ACT_GATHER_INFO
2009-07-21 Name : The remote openSUSE host is missing a security update.
File : suse_11_0_lynx-081030.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Fedora host is missing a security update.
File : fedora_2008-9952.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Mandriva Linux host is missing a security update.
File : mandriva_MDVSA-2008-218.nasl - Type : ACT_GATHER_INFO
2008-12-03 Name : The remote Fedora host is missing a security update.
File : fedora_2008-9550.nasl - Type : ACT_GATHER_INFO
2008-12-03 Name : The remote Fedora host is missing a security update.
File : fedora_2008-9597.nasl - Type : ACT_GATHER_INFO
2008-12-01 Name : The remote openSUSE host is missing a security update.
File : suse_lynx-5720.nasl - Type : ACT_GATHER_INFO
2008-10-28 Name : The remote Red Hat host is missing a security update.
File : redhat-RHSA-2008-0965.nasl - Type : ACT_GATHER_INFO
2008-10-28 Name : The remote CentOS host is missing a security update.
File : centos_RHSA-2008-0965.nasl - Type : ACT_GATHER_INFO
2006-07-03 Name : The remote CentOS host is missing a security update.
File : centos_RHSA-2005-839.nasl - Type : ACT_GATHER_INFO
2006-01-15 Name : The remote Mandrake Linux host is missing a security update.
File : mandrake_MDKSA-2005-211.nasl - Type : ACT_GATHER_INFO
2005-11-15 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200511-09.nasl - Type : ACT_GATHER_INFO
2005-11-15 Name : The remote Fedora Core host is missing a security update.
File : fedora_2005-1079.nasl - Type : ACT_GATHER_INFO
2005-11-15 Name : The remote Red Hat host is missing a security update.
File : redhat-RHSA-2005-839.nasl - Type : ACT_GATHER_INFO
2005-11-15 Name : The remote Fedora Core host is missing a security update.
File : fedora_2005-1078.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:36:43
  • Multiple Updates