Vulnerabilities > CVE-2019-6339 - Improper Input Validation vulnerability in multiple products

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
drupal
debian
CWE-20
critical
nessus
NVD
Published: 2019-01-22
Updated: 2023-11-07

Summary

In Drupal Core versions 7.x prior to 7.62, 8.6.x prior to 8.6.6 and 8.5.x prior to 8.5.9; A remote code execution vulnerability exists in PHP's built-in phar stream wrapper when performing file operations on an untrusted phar:// URI. Some Drupal code (core, contrib, and custom) may be performing file operations on insufficiently validated user input, thereby being exposed to this vulnerability. This vulnerability is mitigated by the fact that such code paths typically require access to an administrative permission or an atypical configuration.

Vulnerable Configurations

Part Description Count
Application
Drupal
96
OS
Debian
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyCGI abuses
    NASL idDRUPAL_8_6_6.NASL
    descriptionAccording to its self-reported version, the instance of Drupal running on the remote web server is 7.x prior to 7.62, 8.5.x prior to 8.5.9, or 8.6.x prior to 8.6.6. It is, therefore, affected by multiple phar handling vulnerabilities. An unauthenticated attacker could leverage these vulnerabilities to potentially perform remote code execution attacks and gain access in the context the web server user.
    last seen2020-06-01
    modified2020-06-02
    plugin id121214
    published2019-01-16
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/121214
    titleDrupal 7.x < 7.62 / 8.5.x < 8.5.9 / 8.6.x < 8.6.6 Multiple Vulnerabilities (SA-CORE-2019-001, SA-CORE-2019-002)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");


if (description)
{
  script_id(121214);
  script_version("1.6");
  script_cvs_date("Date: 2019/10/31 15:18:51");

  script_cve_id("CVE-2018-1000888", "CVE-2019-6338", "CVE-2019-6339");
  script_bugtraq_id(106647, 106664, 106706);
  script_xref(name:"EDB-ID", value:"46108");

  script_name(english:"Drupal 7.x < 7.62 / 8.5.x < 8.5.9 / 8.6.x < 8.6.6 Multiple Vulnerabilities (SA-CORE-2019-001, SA-CORE-2019-002)");
  script_summary(english:"Checks the version of Drupal.");

  script_set_attribute(attribute:"synopsis", value:
"A PHP application running on the remote web server is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the instance of Drupal running
on the remote web server is 7.x prior to 7.62, 8.5.x prior to
8.5.9, or 8.6.x prior to 8.6.6. It is, therefore, affected by multiple
phar handling vulnerabilities. An unauthenticated attacker could
leverage these vulnerabilities to potentially perform remote code
execution attacks and gain access in the context the web server
user.");
  script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/sa-core-2019-001");
  script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/sa-core-2019-002");
  script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/project/drupal/releases/7.62");
  script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/project/drupal/releases/8.5.9");
  script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/project/drupal/releases/8.6.6");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Drupal version 7.60 / 8.5.8 / 8.6.2 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:L/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-2019-6339");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:drupal:drupal");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("drupal_detect.nasl");
  script_require_keys("installed_sw/Drupal", "Settings/ParanoidReport");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

include("vcf.inc");
include("http.inc");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = get_http_port(default:80, php:TRUE);

app_info = vcf::get_app_info(app:"Drupal", port:port, webapp:true);

vcf::check_granularity(app_info:app_info, sig_segments:2);

constraints = [
  { "min_version" : "8.5", "fixed_version" : "8.5.9" },
  { "min_version" : "8.6", "fixed_version" : "8.6.6" },
  { "min_version" : "7.0", "fixed_version" : "7.62" }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4370.NASL
    descriptionTwo vulnerabilities were found in Drupal, a fully-featured content management framework, which could result in arbitrary code execution. For additional information, please refer to the upstream advisories at: https://www.drupal.org/sa-core-2019-001 and https://www.drupal.org/sa-core-2019-002
    last seen2020-03-17
    modified2019-01-18
    plugin id121234
    published2019-01-18
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/121234
    titleDebian DSA-4370-1 : drupal7 - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4370. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(121234);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/24");

  script_cve_id("CVE-2019-6338", "CVE-2019-6339");
  script_xref(name:"DSA", value:"4370");

  script_name(english:"Debian DSA-4370-1 : drupal7 - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Two vulnerabilities were found in Drupal, a fully-featured content
management framework, which could result in arbitrary code execution.

For additional information, please refer to the upstream advisories
at: https://www.drupal.org/sa-core-2019-001 and
https://www.drupal.org/sa-core-2019-002"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.drupal.org/sa-core-2019-001"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.drupal.org/sa-core-2019-002"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/drupal7"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/drupal7"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2019/dsa-4370"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the drupal7 packages.

For the stable distribution (stretch), this problem has been fixed in
version 7.52-2+deb9u6."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/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:L/PR:N/UI:N/S:U/C:H/I:H/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-2019-6339");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:drupal7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"drupal7", reference:"7.52-2+deb9u6")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1685.NASL
    descriptionDrupal core uses the third-party PEAR Archive_Tar library. This library has released a security update which impacts some Drupal configurations. Refer to CVE-2018-1000888 for details. Also a possible regression caused by CVE-2019-6339 is fixed. For Debian 8
    last seen2020-06-01
    modified2020-06-02
    plugin id122320
    published2019-02-20
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/122320
    titleDebian DLA-1685-1 : drupal7 security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1685-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(122320);
  script_version("1.3");
  script_cvs_date("Date: 2020/02/10");

  script_cve_id("CVE-2019-6338");

  script_name(english:"Debian DLA-1685-1 : drupal7 security update");
  script_summary(english:"Checks dpkg output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Drupal core uses the third-party PEAR Archive_Tar library. This
library has released a security update which impacts some Drupal
configurations. Refer to CVE-2018-1000888 for details. Also a possible
regression caused by CVE-2019-6339 is fixed.

For Debian 8 'Jessie', this problem has been fixed in version
7.32-1+deb8u15.

We recommend that you upgrade your drupal7 packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2019/02/msg00032.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/drupal7"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected drupal7 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/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:L/PR:L/UI:R/S:U/C:H/I:H/A:H");
  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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:drupal7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"drupal7", reference:"7.32-1+deb8u15")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1659.NASL
    descriptionA remote code execution vulnerability exists in PHP
    last seen2020-03-17
    modified2019-02-04
    plugin id121556
    published2019-02-04
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/121556
    titleDebian DLA-1659-1 : drupal7 security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1659-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(121556);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/20");

  script_cve_id("CVE-2019-6339");

  script_name(english:"Debian DLA-1659-1 : drupal7 security update");
  script_summary(english:"Checks dpkg output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A remote code execution vulnerability exists in PHP's built-in phar
stream wrapper when performing file operations on an untrusted phar://
URI. Some Drupal code (core, contrib, and custom) may be performing
file operations on insufficiently validated user input, thereby being
exposed to this vulnerability.

With this update a new replacement stream wrapper from typo3 project
is used instead of the built-in one.

For Debian 8 'Jessie', this problem has been fixed in version
7.32-1+deb8u14.

We recommend that you upgrade your drupal7 packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2019/02/msg00004.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/drupal7"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected drupal7 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/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:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:drupal7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/04");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"drupal7", reference:"7.32-1+deb8u14")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References