6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
0.028 Low
EPSS
Percentile
90.7%
Security Fix(es) :
A protocol flaw, publicly referred to as Badlock, was found in the Security Account Manager Remote Protocol (MS-SAMR) and the Local Security Authority (Domain Policy) Remote Protocol (MS-LSAD). Any authenticated DCE/RPC connection that a client initiates against a server could be used by a man-in-the-middle attacker to impersonate the authenticated user against the SAMR or LSA service on the server. As a result, the attacker would be able to get read/write access to the Security Account Manager database, and use this to reveal all passwords or any other potentially sensitive information in that database. (CVE-2016-2118)
Several flaws were found in Samba’s implementation of NTLMSSP authentication. An unauthenticated, man-in-the-middle attacker could use this flaw to clear the encryption and integrity flags of a connection, causing data to be transmitted in plain text. The attacker could also force the client or server into sending data in plain text even if encryption was explicitly requested for that connection.
(CVE-2016-2110)
It was discovered that Samba configured as a Domain Controller would establish a secure communication channel with a machine using a spoofed computer name. A remote attacker able to observe network traffic could use this flaw to obtain session-related information about the spoofed machine. (CVE-2016-2111)
It was found that Samba’s LDAP implementation did not enforce integrity protection for LDAP connections. A man-in-the-middle attacker could use this flaw to downgrade LDAP connections to use no integrity protection, allowing them to hijack such connections.
(CVE-2016-2112)
It was found that Samba did not enable integrity protection for IPC traffic by default. A man-in-the-middle attacker could use this flaw to view and modify the data sent between a Samba server and a client. (CVE-2016-2115)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(90503);
script_version("2.12");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2016-2110", "CVE-2016-2111", "CVE-2016-2112", "CVE-2016-2115", "CVE-2016-2118");
script_name(english:"Scientific Linux Security Update : samba on SL5.x i386/x86_64 (20160412) (Badlock)");
script_summary(english:"Checks rpm output for the updated packages");
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) :
- A protocol flaw, publicly referred to as Badlock, was
found in the Security Account Manager Remote Protocol
(MS-SAMR) and the Local Security Authority (Domain
Policy) Remote Protocol (MS-LSAD). Any authenticated
DCE/RPC connection that a client initiates against a
server could be used by a man-in-the-middle attacker to
impersonate the authenticated user against the SAMR or
LSA service on the server. As a result, the attacker
would be able to get read/write access to the Security
Account Manager database, and use this to reveal all
passwords or any other potentially sensitive information
in that database. (CVE-2016-2118)
- Several flaws were found in Samba's implementation of
NTLMSSP authentication. An unauthenticated,
man-in-the-middle attacker could use this flaw to clear
the encryption and integrity flags of a connection,
causing data to be transmitted in plain text. The
attacker could also force the client or server into
sending data in plain text even if encryption was
explicitly requested for that connection.
(CVE-2016-2110)
- It was discovered that Samba configured as a Domain
Controller would establish a secure communication
channel with a machine using a spoofed computer name. A
remote attacker able to observe network traffic could
use this flaw to obtain session-related information
about the spoofed machine. (CVE-2016-2111)
- It was found that Samba's LDAP implementation did not
enforce integrity protection for LDAP connections. A
man-in-the-middle attacker could use this flaw to
downgrade LDAP connections to use no integrity
protection, allowing them to hijack such connections.
(CVE-2016-2112)
- It was found that Samba did not enable integrity
protection for IPC traffic by default. A
man-in-the-middle attacker could use this flaw to view
and modify the data sent between a Samba server and a
client. (CVE-2016-2115)"
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1604&L=scientific-linux-errata&F=&S=&P=6906
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?b633e72b"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:R/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:fermilab:scientific_linux:libsmbclient");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libsmbclient-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:samba");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:samba-client");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:samba-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:samba-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:samba-swat");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/12");
script_set_attribute(attribute:"patch_publication_date", value:"2016/04/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/13");
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) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Scientific Linux Local Security Checks");
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:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 5.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
flag = 0;
if (rpm_check(release:"SL5", reference:"libsmbclient-3.0.33-3.41.el5_11")) flag++;
if (rpm_check(release:"SL5", reference:"libsmbclient-devel-3.0.33-3.41.el5_11")) flag++;
if (rpm_check(release:"SL5", reference:"samba-3.0.33-3.41.el5_11")) flag++;
if (rpm_check(release:"SL5", reference:"samba-client-3.0.33-3.41.el5_11")) flag++;
if (rpm_check(release:"SL5", reference:"samba-common-3.0.33-3.41.el5_11")) flag++;
if (rpm_check(release:"SL5", reference:"samba-debuginfo-3.0.33-3.41.el5_11")) flag++;
if (rpm_check(release:"SL5", reference:"samba-swat-3.0.33-3.41.el5_11")) 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, "libsmbclient / libsmbclient-devel / samba / samba-client / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
fermilab | scientific_linux | libsmbclient | p-cpe:/a:fermilab:scientific_linux:libsmbclient |
fermilab | scientific_linux | libsmbclient-devel | p-cpe:/a:fermilab:scientific_linux:libsmbclient-devel |
fermilab | scientific_linux | samba | p-cpe:/a:fermilab:scientific_linux:samba |
fermilab | scientific_linux | samba-client | p-cpe:/a:fermilab:scientific_linux:samba-client |
fermilab | scientific_linux | samba-common | p-cpe:/a:fermilab:scientific_linux:samba-common |
fermilab | scientific_linux | samba-debuginfo | p-cpe:/a:fermilab:scientific_linux:samba-debuginfo |
fermilab | scientific_linux | samba-swat | p-cpe:/a:fermilab:scientific_linux:samba-swat |
fermilab | scientific_linux | x-cpe:/o:fermilab:scientific_linux |
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
0.028 Low
EPSS
Percentile
90.7%