CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
86.3%
According to its banner, the version of Samba running on the remote host is 3.2.x prior to 4.1.23, 4.2.x prior to 4.2.9, 4.3.x prior to 4.3.6, or 4.4.0 prior to 4.4.0rc4. It is, therefore, affected by the following vulnerabilities :
A security bypass vulnerability exists in the SMB1 implementation that is triggered when a symlink created to a file or directory using SMB1 UNIX extensions is accessed using non-UNIX SMB1 calls. An authenticated, remote attacker can exploit this to overwrite file and directory ACLs. (CVE-2015-7560)
An out-of-bounds read error exists in the internal DNS server due to improper handling of TXT records when an AD DC is configured. An authenticated, remote attacker can exploit this, via a crafted DNS TXT record, to cause a crash or disclose memory contents. (CVE-2016-0771)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(90098);
script_version("1.6");
script_cvs_date("Date: 2019/11/20");
script_cve_id("CVE-2015-7560", "CVE-2016-0771");
script_name(english:"Samba 3.2.x < 4.1.23 / 4.2.x < 4.2.9 / 4.3.x < 4.3.6 / 4.4.0 < 4.4.0rc4 Multiple Vulnerabilities");
script_summary(english:"Checks the version of Samba.");
script_set_attribute(attribute:"synopsis", value:
"The remote Samba server is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"According to its banner, the version of Samba running on the remote
host is 3.2.x prior to 4.1.23, 4.2.x prior to 4.2.9, 4.3.x prior to
4.3.6, or 4.4.0 prior to 4.4.0rc4. It is, therefore, affected by the
following vulnerabilities :
- A security bypass vulnerability exists in the SMB1
implementation that is triggered when a symlink created
to a file or directory using SMB1 UNIX extensions is
accessed using non-UNIX SMB1 calls. An authenticated,
remote attacker can exploit this to overwrite file and
directory ACLs. (CVE-2015-7560)
- An out-of-bounds read error exists in the internal DNS
server due to improper handling of TXT records when an
AD DC is configured. An authenticated, remote attacker
can exploit this, via a crafted DNS TXT record, to cause
a crash or disclose memory contents. (CVE-2016-0771)
Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2015-7560.html");
script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2016-0771.html");
script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/history/samba-4.1.23.html");
script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/history/samba-4.2.9.html");
script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/history/samba-4.3.6.html");
script_set_attribute(attribute:"solution", value:
"Upgrade to Samba version 4.1.23 / 4.2.9 / 4.3.6 / 4.4.0rc4 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/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:H/PR:L/UI:N/S:U/C:L/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-2016-0771");
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:"2016/03/08");
script_set_attribute(attribute:"patch_publication_date", value:"2016/03/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/03/23");
script_set_attribute(attribute:"potential_vulnerability", value:"true");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:samba:samba");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Misc.");
script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("smb_nativelanman.nasl");
script_require_keys("SMB/NativeLanManager", "SMB/samba", "Settings/ParanoidReport");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
if (report_paranoia < 2) audit(AUDIT_PARANOID);
port = get_kb_item("SMB/transport");
if (!port) port = 445;
lanman = get_kb_item_or_exit("SMB/NativeLanManager");
if ("Samba " >!< lanman) audit(AUDIT_NOT_LISTEN, "Samba", port);
version = lanman - 'Samba ';
if (version =~ "^4(\.[1-4])?$" || version =~ "^3$")
audit(AUDIT_VER_NOT_GRANULAR, "Samba", port, version);
fix = NULL;
regexes = make_array(-1, "rc(\d+)");
# Affected :
# 3.2.x < 4.1.23
# 4.2.x < 4.2.9
# 4.3.x < 4.3.6
# 4.4.0 < 4.4.0rc4
if (
(
version =~ "^3\." &&
version !~ "^3\.[01]\."
) ||
version =~ "^4\.[01]\."
)
fix = '4.1.23';
if (version =~ "^4\.2\.")
fix = '4.2.9';
if (version =~ "^4\.3\.")
fix = '4.3.6';
if (version =~ "^4\.4\.")
fix = '4.4.0rc4';
if (ver_compare(ver:version, fix:fix, regexes:regexes) < 0)
{
report = '\n Installed version : ' + version +
'\n Fixed version : ' + fix +
'\n';
security_report_v4(port:port, severity:SECURITY_WARNING, extra: report);
}
else audit(AUDIT_LISTEN_NOT_VULN, "Samba", port, version);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7560
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0771
www.samba.org/samba/history/samba-4.1.23.html
www.samba.org/samba/history/samba-4.2.9.html
www.samba.org/samba/history/samba-4.3.6.html
www.samba.org/samba/security/CVE-2015-7560.html
www.samba.org/samba/security/CVE-2016-0771.html
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
86.3%