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
90.0%
An updated ruby package that fixes a denial of service issue for the CGI instance is now available.
[Updated 17 Jan 2005] Errata has been updated to include 32-bit libraries on 64-bit architectures.
Ruby is an interpreted scripting language for object-oriented programming.
A flaw was dicovered in the CGI module of Ruby. If empty data is sent by the POST method to the CGI script which requires MIME type multipart/form-data, it can get stuck in a loop. A remote attacker could trigger this flaw and cause a denial of service. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-0983 to this issue.
Users are advised to upgrade to this erratum package, which contains a backported patch to cgi.rb.
#%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-2004:635. The text
# itself is copyright (C) Red Hat, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(15945);
script_version("1.26");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2004-0983");
script_xref(name:"RHSA", value:"2004:635");
script_name(english:"RHEL 2.1 / 3 : ruby (RHSA-2004:635)");
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:
"An updated ruby package that fixes a denial of service issue for the
CGI instance is now available.
[Updated 17 Jan 2005] Errata has been updated to include 32-bit
libraries on 64-bit architectures.
Ruby is an interpreted scripting language for object-oriented
programming.
A flaw was dicovered in the CGI module of Ruby. If empty data is sent
by the POST method to the CGI script which requires MIME type
multipart/form-data, it can get stuck in a loop. A remote attacker
could trigger this flaw and cause a denial of service. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the
name CVE-2004-0983 to this issue.
Users are advised to upgrade to this erratum package, which contains a
backported patch to cgi.rb."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2004-0983"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2004:635"
);
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:P");
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-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-tcltk");
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:"vuln_publication_date", value:"2005/03/01");
script_set_attribute(attribute:"patch_publication_date", value:"2005/01/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2004/12/13");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2004-2021 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:"^(2\.1|3)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 2.1 / 3.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "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-2004:635";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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:"irb-1.6.4-2.AS21.1")) flag++;
if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-1.6.4-2.AS21.1")) flag++;
if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-devel-1.6.4-2.AS21.1")) flag++;
if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-docs-1.6.4-2.AS21.1")) flag++;
if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-libs-1.6.4-2.AS21.1")) flag++;
if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-tcltk-1.6.4-2.AS21.1")) flag++;
if (rpm_check(release:"RHEL3", reference:"irb-1.6.8-9.EL3.3")) flag++;
if (rpm_check(release:"RHEL3", reference:"ruby-1.6.8-9.EL3.3")) flag++;
if (rpm_check(release:"RHEL3", reference:"ruby-devel-1.6.8-9.EL3.3")) flag++;
if (rpm_check(release:"RHEL3", reference:"ruby-docs-1.6.8-9.EL3.3")) flag++;
if (rpm_check(release:"RHEL3", reference:"ruby-libs-1.6.8-9.EL3.3")) flag++;
if (rpm_check(release:"RHEL3", reference:"ruby-mode-1.6.8-9.EL3.3")) flag++;
if (rpm_check(release:"RHEL3", reference:"ruby-tcltk-1.6.8-9.EL3.3")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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-libs / ruby-mode / etc");
}
}