CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
97.9%
One important denial of service (in 1.4.31) fix: CVE-2012-5533.
A flaw was found in lighttpd version 1.4.31 that could be exploited by a remote user to cause a denial of service condition in lighttpd. A client could send a malformed Connection header to lighttpd (such as โConnection: TE,Keep-Aliveโ), which would cause lighttpd to enter an endless loop, detecting an empty token but not incrementing the current string position, causing it to continually read โ,โ over and over.
This flaw was introduced in 1.4.31 [1] when an โinvalid readโ bug was fixed [2].
[1] http://redmine.lighttpd.net/projects/lighttpd/repository/revisions/283 0/diff/ [2] http://redmine.lighttpd.net/issues/2413
Acknowledgement :
Red Hat would like to thank Stefan Buhler for reporting this issue.
Upstream acknowledges Jesse Sipprell from McClatchy Interactive, Inc.
as the original reporter.
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.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Fedora Security Advisory 2013-15344.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(69774);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2012-5533");
script_bugtraq_id(56619);
script_xref(name:"FEDORA", value:"2013-15344");
script_name(english:"Fedora 18 : lighttpd-1.4.32-1.fc18 (2013-15344)");
script_summary(english:"Checks rpm output for the updated package.");
script_set_attribute(
attribute:"synopsis",
value:"The remote Fedora host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"One important denial of service (in 1.4.31) fix: CVE-2012-5533.
A flaw was found in lighttpd version 1.4.31 that could be exploited by
a remote user to cause a denial of service condition in lighttpd. A
client could send a malformed Connection header to lighttpd (such as
'Connection: TE,,Keep-Alive'), which would cause lighttpd to enter an
endless loop, detecting an empty token but not incrementing the
current string position, causing it to continually read ',' over and
over.
This flaw was introduced in 1.4.31 [1] when an 'invalid read' bug was
fixed [2].
[1]
http://redmine.lighttpd.net/projects/lighttpd/repository/revisions/283
0/diff/ [2] http://redmine.lighttpd.net/issues/2413
Acknowledgement :
Red Hat would like to thank Stefan Buhler for reporting this issue.
Upstream acknowledges Jesse Sipprell from McClatchy Interactive, Inc.
as the original reporter.
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."
);
script_set_attribute(
attribute:"see_also",
value:"http://redmine.lighttpd.net/issues/2413"
);
# http://redmine.lighttpd.net/projects/lighttpd/repository/revisions/2830/diff/
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?dec5b23a"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugzilla.redhat.com/show_bug.cgi?id=878914"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugzilla.redhat.com/show_bug.cgi?id=878915"
);
# https://lists.fedoraproject.org/pipermail/package-announce/2013-September/115110.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?4a2db5ed"
);
script_set_attribute(
attribute:"solution",
value:"Update the affected lighttpd package."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:lighttpd");
script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:18");
script_set_attribute(attribute:"patch_publication_date", value:"2013/08/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/09/04");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
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:"^18([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 18.x", "Fedora " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
flag = 0;
if (rpm_check(release:"FC18", reference:"lighttpd-1.4.32-1.fc18")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
else security_warning(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "lighttpd");
}