Vulnerabilities > CVE-2016-8024 - HTTP Response Splitting vulnerability in Mcafee Virusscan Enterprise

047910
CVSS 8.1 - HIGH
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
high complexity
mcafee
CWE-113
nessus
exploit available

Summary

Improper neutralization of CRLF sequences in HTTP headers vulnerability in Intel Security VirusScan Enterprise Linux (VSEL) 2.0.3 (and earlier) allows remote unauthenticated attacker to obtain sensitive information via the server HTTP response spoofing.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing/Intercepting/Modifying HTTP Cookies
    This attack relies on the use of HTTP Cookies to store credentials, state information and other critical data on client systems. The first form of this attack involves accessing HTTP Cookies to mine for potentially sensitive data contained therein. The second form of this attack involves intercepting this data as it is transmitted from client to server. This intercepted information is then used by the attacker to impersonate the remote user/session. The third form is when the cookie's content is modified by the attacker before it is sent back to the server. Here the attacker seeks to convince the target server to operate on this falsified information.
  • HTTP Response Splitting
    This attack uses a maliciously-crafted HTTP request in order to cause a vulnerable web server to respond with an HTTP response stream that will be interpreted by the client as two separate responses instead of one. This is possible when user-controlled input is used unvalidated as part of the response headers. The target software, the client, will interpret the injected header as being a response to a second request, thereby causing the maliciously-crafted contents be displayed and possibly cached. To achieve HTTP Response Splitting on a vulnerable web server, the attacker:
  • Simple Script Injection
    An attacker embeds malicious scripts in content that will be served to web browsers. The goal of the attack is for the target software, the client-side browser, to execute the script with the users' privilege level. An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute code and scripts. Web browsers, for example, have some simple security controls in place, but if a remote attacker is allowed to execute scripts (through injecting them in to user-generated content like bulletin boards) then these controls may be bypassed. Further, these attacks are very difficult for an end user to detect.
  • AJAX Fingerprinting
    This attack utilizes the frequent client-server roundtrips in Ajax conversation to scan a system. While Ajax does not open up new vulnerabilities per se, it does optimize them from an attacker point of view. In many XSS attacks the attacker must get a "hole in one" and successfully exploit the vulnerability on the victim side the first time, once the client is redirected the attacker has many chances to engage in follow on probes, but there is only one first chance. In a widely used web application this is not a major problem because 1 in a 1,000 is good enough in a widely used application. A common first step for an attacker is to footprint the environment to understand what attacks will work. Since footprinting relies on enumeration, the conversational pattern of rapid, multiple requests and responses that are typical in Ajax applications enable an attacker to look for many vulnerabilities, well-known ports, network locations and so on.

Exploit-Db

descriptionMcAfee Virus Scan Enterprise for Linux - Remote Code Execution. CVE-2016-8016,CVE-2016-8017,CVE-2016-8018,CVE-2016-8019,CVE-2016-8020,CVE-2016-8021,CVE-2016-...
fileexploits/linux/remote/40911.py
idEDB-ID:40911
last seen2016-12-13
modified2016-12-13
platformlinux
port
published2016-12-13
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/40911/
titleMcAfee Virus Scan Enterprise for Linux - Remote Code Execution
typeremote

Nessus

NASL familyMisc.
NASL idMCAFEE_VSEL_SB10181.NASL
descriptionThe remote host has a version of McAfee VirusScan Enterprise for Linux (VSEL) installed that is prior or equal to 2.0.3. It is, therefore, affected by multiple vulnerabilities : - An information disclosure vulnerability exists in the web interface due to improper error reporting. An authenticated, remote attacker can exploit this, by manipulating the
last seen2020-06-01
modified2020-06-02
plugin id95812
published2016-12-14
reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/95812
titleMcAfee VirusScan Enterprise for Linux <= 2.0.3 Multiple vulnerabilities (SB10181)
code
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(95812);
  script_version("1.9");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2016-8016",
    "CVE-2016-8017",
    "CVE-2016-8018",
    "CVE-2016-8019",
    "CVE-2016-8020",
    "CVE-2016-8021",
    "CVE-2016-8022",
    "CVE-2016-8023",
    "CVE-2016-8024",
    "CVE-2016-8025"
  );
  script_bugtraq_id(94823);
  script_xref(name:"MCAFEE-SB", value:"SB10181");
  script_xref(name:"CERT", value:"245327");
  script_xref(name:"EDB-ID", value:"40911");

  script_name(english:"McAfee VirusScan Enterprise for Linux <= 2.0.3 Multiple vulnerabilities (SB10181)");
  script_summary(english:"Checks VSEL version");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host has a version of McAfee VirusScan Enterprise for Linux
(VSEL) installed that is prior or equal to 2.0.3. It is, therefore,
affected by multiple vulnerabilities :

  - An information disclosure vulnerability exists in the
    web interface due to improper error reporting. An
    authenticated, remote attacker can exploit this, by
    manipulating the 'tplt' parameter, to disclose filenames
    on the system. (CVE-2016-8016)

  - An information disclosure vulnerability exists in the
    parser due to improper handling of template files. An
    authenticated, remote attacker can exploit this, via
    specially crafted text elements, to disclose the
    contents of arbitrary files subject to the privileges of
    the 'nails' account. (CVE-2016-8017)

  - Multiple cross-site request forgery (XSRF)
    vulnerabilities exist in the web interface due to a
    failure to require multiple steps, explicit
    confirmation, or a unique token when performing certain
    sensitive actions. An unauthenticated, remote attacker
    can exploit these vulnerabilities, by convincing a user
    to follow a specially crafted link, to execute arbitrary
    script code or commands in a user's browser session.
    (CVE-2016-8018)

  - Multiple cross-site scripting (XSS) vulnerabilities
    exist due to improper validation of user-supplied input
    to the 'info:7' and 'info:5' parameters when the 'tplt'
    parameter is set in NailsConfig.html or
    MonitorHost.html. An unauthenticated, remote attacker
    can exploit these vulnerabilities, via a specially
    crafted request, to execute arbitrary script code in a
    user's browser session. (CVE-2016-8019)

  - A remote code execution vulnerability exists due to
    improper validation of user-supplied input to the
    'nailsd.profile.ODS_9.scannerPath' variable in the last
    page of the system scan form. An authenticated, remote
    attacker can exploit this, via a specially crafted HTTP
    request, to execute arbitrary code as the root user.
    (CVE-2016-8020)

  - A remote code execution vulnerability exists in the web
    interface when downloading update files from a specified
    update server due to a race condition. An authenticated,
    remote attacker can exploit this to place and execute a
    downloaded file before integrity checks are completed.
    (CVE-2016-8021)

  - A security bypass vulnerability exists in the web
    interface due to improper handling of authentication
    cookies. The authentication cookie stores the IP address 
    of the client and is checked to ensure it matches the
    IP address of the client sending it; however, an 
    unauthenticated, remote attacker can cause the cookie to
    be incorrectly parsed by adding a number of spaces to
    the IP address stored within the cookie, resulting in a
    bypass of the security mechanism. (CVE-2016-8022)

  - A security bypass vulnerability exists in the web
    interface due to improper handling of the nailsSessionId
    authentication cookie. An unauthenticated, remote
    attacker can exploit this, by brute-force guessing the
    server start authentication token within the cookie, to
    bypass authentication mechanisms. (CVE-2016-8023)

  - An HTTP response splitting vulnerability exists due to
    improper sanitization of carriage return and line feed
    (CRLF) character sequences passed to the 'info:0'
    parameter before being included in HTTP responses. An
    authenticated, remote attacker can exploit this to
    inject additional headers in responses and disclose
    sensitive information. (CVE-2016-8024)

  - A SQL injection (SQLi) vulnerability exists in the web
    interface due to improper sanitization of user-supplied
    input to the 'mon:0' parameter. An authenticated, remote
    attacker can exploit this to inject or manipulate SQL
    queries in the back-end database, resulting in the
    manipulation or disclosure of arbitrary data.
    (CVE-2016-8025)");
  script_set_attribute(attribute:"see_also", value:"https://kc.mcafee.com/corporate/index?page=content&id=SB10181");
  script_set_attribute(attribute:"see_also", value:"https://nation.state.actor/mcafee.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Endpoint Security for Linux (ENSL) version 10.2.0 or later.
Alternatively, as a workaround, open the following line in a text editor:
'/var/opt/NAI/LinuxShield/etc/nailsd.cfg' and change 'nailsd.disableCltWEbUI: false' 
to the value of true and restart the nails service.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-8024");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mcafee:virusscan_enterprise");
  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("mcafee_vsel_detect.nbin");
  script_require_keys("installed_sw/McAfee VirusScan Enterprise for Linux");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("install_func.inc");
include("ssh_func.inc");
include("telnet_func.inc");
include("hostlevel_funcs.inc");

if ( islocalhost() )
{
  port = 0;
  if ( ! defined_func("pread") ) exit(1, "'pread()' is not defined.");
    info_t = INFO_LOCAL;
}
else
{
  port = kb_ssh_transport();
  if (!get_port_state(port)) audit(AUDIT_PORT_CLOSED, port);

  ret = ssh_open_connection();
  if (!ret) audit(AUDIT_FN_FAIL, "ssh_open_connection()");

    info_t = INFO_SSH;
}

app_name = "McAfee VirusScan Enterprise for Linux";
get_install_count(app_name:app_name, exit_if_zero:TRUE);

install = get_single_install(app_name:app_name, exit_if_unknown_ver:TRUE);
version = install['version'];
vuln = FALSE;

if (ver_compare(ver:version, fix:"2.0.3", strict:FALSE) <= 0 || version =~ "^2\.0\.3") 
{
  cmd = 'grep nailsd.disableCltWebUI /var/opt/NAI/LinuxShield/etc/nailsd.cfg | tr -d "\n"';
  buf = info_send_cmd(cmd:cmd);
  # match = is temporary workaround in place?
  match = pregmatch(pattern:'nailsd.disableCltWebUI: true', string:buf);
  if (!isnull(match)) audit(AUDIT_HOST_NOT, "affected because 'nailsd.disableCltWebUI' is set to true");
  # set to false & vulnerable
  notSet = pregmatch(pattern:'nailsd.disableCltWebUI: false', string:buf);
  # no config setting & vuln
  dne = pregmatch(pattern:'nailsd.disableCltWebUI:', string:buf);
  # if false or if the config does not exist and we are v2.0.3 then flag as vuln
  if (!isnull(notSet) || isnull(dne)) vuln = TRUE;
}


if (vuln)
{
  port = 0;
  report ='\nInstalled version : ' + version +
          '\nSolution          : Upgrade to McAfee Endpoint Security for Linux (ENSL) 10.2.0 or later.\n';
  security_report_v4(severity:SECURITY_WARNING, extra:report, port:port, xss:TRUE, sqli:TRUE, xsrf:TRUE);
}
else audit(AUDIT_INST_VER_NOT_VULN, version);

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/140147/mvsel-exec.txt
idPACKETSTORM:140147
last seen2016-12-14
published2016-12-14
reporterAndrew Fasano
sourcehttps://packetstormsecurity.com/files/140147/McAfee-Virus-Scan-Enterprise-For-Linux-Remote-Code-Execution.html
titleMcAfee Virus Scan Enterprise For Linux Remote Code Execution

Saint

bid94823
descriptionMcAfee VirusScan Enterprise for Linux authentication token brute force
titlemcafee_virus_scan_linux_brute
typeremote