A flaw was found in the way SSL 3.0 handled padding bytes when decrypting messages encrypted using block ciphers in cipher block chaining (CBC) mode. This flaw allows a man-in-the-middle (MITM) attacker to decrypt a selected byte of a cipher text in as few as 256 tries if they are able to force a victim application to repeatedly send the same data over newly created SSL 3.0 connections.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2014-429.
#
include("compat.inc");
if (description)
{
script_id(78559);
script_version("1.15");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/06/28");
script_cve_id("CVE-2014-3566");
script_xref(name:"ALAS", value:"2014-429");
script_name(english:"Amazon Linux AMI : nss (ALAS-2014-429) (POODLE)");
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 flaw was found in the way SSL 3.0 handled padding bytes when
decrypting messages encrypted using block ciphers in cipher block
chaining (CBC) mode. This flaw allows a man-in-the-middle (MITM)
attacker to decrypt a selected byte of a cipher text in as few as 256
tries if they are able to force a victim application to repeatedly
send the same data over newly created SSL 3.0 connections."
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2014-429.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update nss' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N");
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:amazon:linux:nss");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-pkcs11-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-sysinit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:nss-tools");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2014/10/15");
script_set_attribute(attribute:"patch_publication_date", value:"2014/10/16");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/10/20");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2014-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
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:"nss-3.16.2-7.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nss-debuginfo-3.16.2-7.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nss-devel-3.16.2-7.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nss-pkcs11-devel-3.16.2-7.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nss-sysinit-3.16.2-7.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"nss-tools-3.16.2-7.57.amzn1")) 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, "nss / nss-debuginfo / nss-devel / nss-pkcs11-devel / nss-sysinit / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | nss | p-cpe:/a:amazon:linux:nss |
amazon | linux | nss-debuginfo | p-cpe:/a:amazon:linux:nss-debuginfo |
amazon | linux | nss-devel | p-cpe:/a:amazon:linux:nss-devel |
amazon | linux | nss-pkcs11-devel | p-cpe:/a:amazon:linux:nss-pkcs11-devel |
amazon | linux | nss-sysinit | p-cpe:/a:amazon:linux:nss-sysinit |
amazon | linux | nss-tools | p-cpe:/a:amazon:linux:nss-tools |
amazon | linux | cpe:/o:amazon:linux |