Security Fix(es) :
unbound: amplification of an incoming query into a large number of queries directed to a target (CVE-2020-12662)
unbound: infinite loop via malformed DNS answers received from upstream servers (CVE-2020-12663)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('compat.inc');
if (description)
{
script_id(137742);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/06");
script_cve_id("CVE-2020-12662", "CVE-2020-12663");
script_name(english:"Scientific Linux Security Update : unbound on SL6.x i386/x86_64 (20200622)");
script_set_attribute(attribute:"synopsis", value:
"The remote Scientific Linux host is missing one or more security
updates.");
script_set_attribute(attribute:"description", value:
"Security Fix(es) :
- unbound: amplification of an incoming query into a large
number of queries directed to a target (CVE-2020-12662)
- unbound: infinite loop via malformed DNS answers
received from upstream servers (CVE-2020-12663)");
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind2006&L=SCIENTIFIC-LINUX-ERRATA&P=7261
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4bdaa018");
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_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-12663");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/19");
script_set_attribute(attribute:"patch_publication_date", value:"2020/06/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/23");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:unbound");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:unbound-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:unbound-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:unbound-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:unbound-python");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Scientific Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");
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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 6.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
flag = 0;
if (rpm_check(release:"SL6", reference:"unbound-1.4.20-29.el6_10.1")) flag++;
if (rpm_check(release:"SL6", reference:"unbound-debuginfo-1.4.20-29.el6_10.1")) flag++;
if (rpm_check(release:"SL6", reference:"unbound-devel-1.4.20-29.el6_10.1")) flag++;
if (rpm_check(release:"SL6", reference:"unbound-libs-1.4.20-29.el6_10.1")) flag++;
if (rpm_check(release:"SL6", reference:"unbound-python-1.4.20-29.el6_10.1")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "unbound / unbound-debuginfo / unbound-devel / unbound-libs / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
fermilab | scientific_linux | unbound | p-cpe:/a:fermilab:scientific_linux:unbound |
fermilab | scientific_linux | unbound-debuginfo | p-cpe:/a:fermilab:scientific_linux:unbound-debuginfo |
fermilab | scientific_linux | unbound-devel | p-cpe:/a:fermilab:scientific_linux:unbound-devel |
fermilab | scientific_linux | unbound-libs | p-cpe:/a:fermilab:scientific_linux:unbound-libs |
fermilab | scientific_linux | unbound-python | p-cpe:/a:fermilab:scientific_linux:unbound-python |
fermilab | scientific_linux | x-cpe:/o:fermilab:scientific_linux |