CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS
Percentile
88.2%
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.
#%NASL_MIN_LEVEL 70300
#
# (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('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(40962);
script_version("1.15");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
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) 2009-2021 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");
}