CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
EPSS
Percentile
95.0%
Updated ruby packages that fix a security issue are now available for Red Hat Enterprise Linux 4 and 5.
This update has been rated as having moderate security impact by the Red Hat Security Response Team.
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks.
Vincent Danen reported, that Red Hat Security Advisory RHSA-2008:0897 did not properly address a denial of service flaw in the WEBrick (Ruby HTTP server toolkit), known as CVE-2008-3656. This flaw allowed a remote attacker to send a specially crafted HTTP request to a WEBrick server that would cause the server to use excessive CPU time. This update properly addresses this flaw. (CVE-2008-4310)
All Ruby users should upgrade to these updated packages, which contain a correct patch that resolves this issue.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2008:0981. The text
# itself is copyright (C) Red Hat, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(35038);
script_version("1.28");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2008-3656", "CVE-2008-4310");
script_bugtraq_id(30644);
script_xref(name:"RHSA", value:"2008:0981");
script_name(english:"RHEL 4 / 5 : ruby (RHSA-2008:0981)");
script_summary(english:"Checks the rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Red Hat host is missing one or more security updates."
);
script_set_attribute(
attribute:"description",
value:
"Updated ruby packages that fix a security issue are now available for
Red Hat Enterprise Linux 4 and 5.
This update has been rated as having moderate security impact by the
Red Hat Security Response Team.
Ruby is an extensible, interpreted, object-oriented, scripting
language. It has features to process text files and to do system
management tasks.
Vincent Danen reported, that Red Hat Security Advisory RHSA-2008:0897
did not properly address a denial of service flaw in the WEBrick (Ruby
HTTP server toolkit), known as CVE-2008-3656. This flaw allowed a
remote attacker to send a specially crafted HTTP request to a WEBrick
server that would cause the server to use excessive CPU time. This
update properly addresses this flaw. (CVE-2008-4310)
All Ruby users should upgrade to these updated packages, which contain
a correct patch that resolves this issue."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2008-4310"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2008:0981"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
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_cwe_id(399);
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:irb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-irb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-mode");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-rdoc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-ri");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-tcltk");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4.7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5.2");
script_set_attribute(attribute:"vuln_publication_date", value:"2008/08/12");
script_set_attribute(attribute:"patch_publication_date", value:"2008/12/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2008/12/05");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2008-2021 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:"^(4|5)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 4.x / 5.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "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-2008:0981";
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:"RHEL4", reference:"irb-1.8.1-7.el4_7.2")) flag++;
if (rpm_check(release:"RHEL4", reference:"ruby-1.8.1-7.el4_7.2")) flag++;
if (rpm_check(release:"RHEL4", reference:"ruby-devel-1.8.1-7.el4_7.2")) flag++;
if (rpm_check(release:"RHEL4", reference:"ruby-docs-1.8.1-7.el4_7.2")) flag++;
if (rpm_check(release:"RHEL4", reference:"ruby-libs-1.8.1-7.el4_7.2")) flag++;
if (rpm_check(release:"RHEL4", reference:"ruby-mode-1.8.1-7.el4_7.2")) flag++;
if (rpm_check(release:"RHEL4", reference:"ruby-tcltk-1.8.1-7.el4_7.2")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", reference:"ruby-devel-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-docs-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-docs-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-docs-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-irb-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-irb-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-irb-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", reference:"ruby-libs-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-mode-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-mode-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-mode-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-rdoc-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-rdoc-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-rdoc-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-ri-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-ri-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-ri-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-tcltk-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-tcltk-1.8.5-5.el5_2.6")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-tcltk-1.8.5-5.el5_2.6")) 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, "irb / ruby / ruby-devel / ruby-docs / ruby-irb / ruby-libs / etc");
}
}