A denial of service flaw was found in the way the TLS/SSL protocol defined
processing of ALERT packets during a connection handshake. A remote attacker
could use this flaw to make a TLS/SSL server consume an excessive amount of CPU
and fail to accept connections form other clients. (CVE-2016-8610)
Multiple flaws were found in the way gnutls processed OpenPGP certificates. An
attacker could create specially crafted OpenPGP certificates which, when parsed
by gnutls, would cause it to crash. (CVE-2017-5335 , CVE-2017-5336 ,
CVE-2017-5337)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2017-815.
#
include("compat.inc");
if (description)
{
script_id(99419);
script_version("3.3");
script_cvs_date("Date: 2018/04/18 15:09:36");
script_cve_id("CVE-2016-8610", "CVE-2017-5335", "CVE-2017-5336", "CVE-2017-5337");
script_xref(name:"ALAS", value:"2017-815");
script_xref(name:"RHSA", value:"2017:0574");
script_name(english:"Amazon Linux AMI : gnutls (ALAS-2017-815)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Amazon Linux AMI host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"A denial of service flaw was found in the way the TLS/SSL protocol
defined
processing of ALERT packets during a connection handshake. A remote
attacker
could use this flaw to make a TLS/SSL server consume an excessive
amount of CPU
and fail to accept connections form other clients. (CVE-2016-8610)
Multiple flaws were found in the way gnutls processed OpenPGP
certificates. An
attacker could create specially crafted OpenPGP certificates which,
when parsed
by gnutls, would cause it to crash. (CVE-2017-5335 , CVE-2017-5336 ,
CVE-2017-5337)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2017-815.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update gnutls' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gnutls");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gnutls-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gnutls-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gnutls-guile");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:gnutls-utils");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2017/04/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/18");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");
script_family(english:"Amazon Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/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/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (rpm_check(release:"ALA", reference:"gnutls-2.12.23-21.18.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"gnutls-debuginfo-2.12.23-21.18.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"gnutls-devel-2.12.23-21.18.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"gnutls-guile-2.12.23-21.18.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"gnutls-utils-2.12.23-21.18.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gnutls / gnutls-debuginfo / gnutls-devel / gnutls-guile / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | gnutls | p-cpe:/a:amazon:linux:gnutls |
amazon | linux | gnutls-debuginfo | p-cpe:/a:amazon:linux:gnutls-debuginfo |
amazon | linux | gnutls-devel | p-cpe:/a:amazon:linux:gnutls-devel |
amazon | linux | gnutls-guile | p-cpe:/a:amazon:linux:gnutls-guile |
amazon | linux | gnutls-utils | p-cpe:/a:amazon:linux:gnutls-utils |
amazon | linux | cpe:/o:amazon:linux |