Updated nss packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications.
A flaw was found in the way TLS 1.2 could use the MD5 hash function for signing ServerKeyExchange and Client Authentication packets during a TLS handshake. A man-in-the-middle attacker able to force a TLS connection to use the MD5 hash function could use this flaw to conduct collision attacks to impersonate a TLS server or an authenticated TLS client. (CVE-2015-7575)
All nss users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. For the update to take effect, all services linked to the NSS library must be restarted, or the system rebooted.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2016:0007. The text
# itself is copyright (C) Red Hat, Inc.
#
include("compat.inc");
if (description)
{
script_id(87807);
script_version("2.19");
script_cvs_date("Date: 2019/10/24 15:35:40");
script_cve_id("CVE-2015-7575");
script_xref(name:"RHSA", value:"2016:0007");
script_name(english:"RHEL 6 / 7 : nss (RHSA-2016:0007) (SLOTH)");
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 nss packages that fix one security issue are now available for
Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Moderate
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.
Network Security Services (NSS) is a set of libraries designed to
support the cross-platform development of security-enabled client and
server applications.
A flaw was found in the way TLS 1.2 could use the MD5 hash function
for signing ServerKeyExchange and Client Authentication packets during
a TLS handshake. A man-in-the-middle attacker able to force a TLS
connection to use the MD5 hash function could use this flaw to conduct
collision attacks to impersonate a TLS server or an authenticated TLS
client. (CVE-2015-7575)
All nss users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. For the update to
take effect, all services linked to the NSS library must be restarted,
or the system rebooted."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/articles/2112261"
);
# http://www.mitls.org/pages/attacks/SLOTH
script_set_attribute(
attribute:"see_also",
value:"https://www.mitls.org/pages/attacks/SLOTH"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2016:0007"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2015-7575"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nss");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nss-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nss-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nss-pkcs11-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nss-sysinit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nss-tools");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.3");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.5");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.7");
script_set_attribute(attribute:"vuln_publication_date", value:"2016/01/09");
script_set_attribute(attribute:"patch_publication_date", value:"2016/01/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/08");
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) 2016-2019 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:"^(6|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x / 7.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "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-2016:0007";
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:"RHEL6", reference:"nss-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", reference:"nss-debuginfo-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", reference:"nss-devel-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", reference:"nss-pkcs11-devel-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"nss-sysinit-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"nss-sysinit-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"nss-sysinit-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"nss-tools-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"nss-tools-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"nss-tools-3.19.1-8.el6_7")) flag++;
if (rpm_check(release:"RHEL7", reference:"nss-3.19.1-19.el7_2")) flag++;
if (rpm_check(release:"RHEL7", reference:"nss-debuginfo-3.19.1-19.el7_2")) flag++;
if (rpm_check(release:"RHEL7", reference:"nss-devel-3.19.1-19.el7_2")) flag++;
if (rpm_check(release:"RHEL7", reference:"nss-pkcs11-devel-3.19.1-19.el7_2")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"nss-sysinit-3.19.1-19.el7_2")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"nss-sysinit-3.19.1-19.el7_2")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"nss-tools-3.19.1-19.el7_2")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"nss-tools-3.19.1-19.el7_2")) 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, "nss / nss-debuginfo / nss-devel / nss-pkcs11-devel / nss-sysinit / etc");
}
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | nss | p-cpe:/a:redhat:enterprise_linux:nss |
redhat | enterprise_linux | nss-debuginfo | p-cpe:/a:redhat:enterprise_linux:nss-debuginfo |
redhat | enterprise_linux | nss-devel | p-cpe:/a:redhat:enterprise_linux:nss-devel |
redhat | enterprise_linux | nss-pkcs11-devel | p-cpe:/a:redhat:enterprise_linux:nss-pkcs11-devel |
redhat | enterprise_linux | nss-sysinit | p-cpe:/a:redhat:enterprise_linux:nss-sysinit |
redhat | enterprise_linux | nss-tools | p-cpe:/a:redhat:enterprise_linux:nss-tools |
redhat | enterprise_linux | 6 | cpe:/o:redhat:enterprise_linux:6 |
redhat | enterprise_linux | 6.7 | cpe:/o:redhat:enterprise_linux:6.7 |
redhat | enterprise_linux | 7 | cpe:/o:redhat:enterprise_linux:7 |
redhat | enterprise_linux | 7.2 | cpe:/o:redhat:enterprise_linux:7.2 |