Vulnerabilities > CVE-2017-7811 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Mozilla Firefox

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
mozilla
CWE-119
critical
nessus
NVD
Published: 2018-06-11
Updated: 2018-07-30

Summary

Memory safety bugs were reported in Firefox 55. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 56.

Vulnerable Configurations

Part Description Count
Application
Mozilla
523

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.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyWindows
    NASL idMOZILLA_FIREFOX_56_0.NASL
    descriptionThe version of Mozilla Firefox installed on the remote Windows host is prior to 56. It is, therefore, affected by multiple vulnerabilities, some of which allow code execution and potentially exploitable crashes.
    last seen2020-06-01
    modified2020-06-02
    plugin id103680
    published2017-10-06
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103680
    titleMozilla Firefox < 56 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103680);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-7793",
    "CVE-2017-7805",
    "CVE-2017-7810",
    "CVE-2017-7811",
    "CVE-2017-7812",
    "CVE-2017-7813",
    "CVE-2017-7814",
    "CVE-2017-7815",
    "CVE-2017-7816",
    "CVE-2017-7817",
    "CVE-2017-7818",
    "CVE-2017-7819",
    "CVE-2017-7820",
    "CVE-2017-7821",
    "CVE-2017-7822",
    "CVE-2017-7823",
    "CVE-2017-7824"
  );
  script_bugtraq_id(
    101053,
    101054,
    101055,
    101057
  );
  script_xref(name:"MFSA", value:"2017-21");

  script_name(english:"Mozilla Firefox < 56 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of Firefox.");

  script_set_attribute(attribute:"synopsis", value:
"A web browser installed on the remote Windows host is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Mozilla Firefox installed on the remote Windows host is
prior to 56. It is, therefore, affected by multiple vulnerabilities,
some of which allow code execution and potentially exploitable crashes.");
  script_set_attribute(attribute:"see_also", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2017-21/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox version 56 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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-2017-7811");

  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:"2017/09/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:firefox");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mozilla_org_installed.nasl");
  script_require_keys("Mozilla/Firefox/Version");

  exit(0);
}

include("mozilla_version.inc");

port = get_kb_item("SMB/transport");
if (!port) port = 445;

installs = get_kb_list("SMB/Mozilla/Firefox/*");
if (isnull(installs)) audit(AUDIT_NOT_INST, "Firefox");

mozilla_check_version(installs:installs, product:'firefox', fix:'56', severity:SECURITY_HOLE);
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3435-1.NASL
    descriptionMultiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to read uninitialized memory, obtain sensitive information, bypass phishing and malware protection, spoof the origin in modal dialogs, conduct cross-site scripting (XSS) attacks, cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7793, CVE-2017-7810, CVE-2017-7811, CVE-2017-7812, CVE-2017-7813, CVE-2017-7814, CVE-2017-7815, CVE-2017-7818, CVE-2017-7819, CVE-2017-7820, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824) Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7805) Multiple security issues were discovered in WebExtensions. If a user were tricked in to installing a specially crafted extension, an attacker could potentially exploit these to download and open non-executable files without interaction, or obtain elevated privileges. (CVE-2017-7816, CVE-2017-7821). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id103646
    published2017-10-03
    reporterUbuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103646
    titleUbuntu 14.04 LTS / 16.04 LTS / 17.04 : firefox vulnerabilities (USN-3435-1)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3435-2.NASL
    descriptionUSN-3435-1 fixed vulnerabilities in Firefox. The update caused the Flash plugin to crash in some circumstances. This update fixes the problem. We apologize for the inconvenience. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to read uninitialized memory, obtain sensitive information, bypass phishing and malware protection, spoof the origin in modal dialogs, conduct cross-site scripting (XSS) attacks, cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7793, CVE-2017-7810, CVE-2017-7811, CVE-2017-7812, CVE-2017-7813, CVE-2017-7814, CVE-2017-7815, CVE-2017-7818, CVE-2017-7819, CVE-2017-7820, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824) Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7805) Multiple security issues were discovered in WebExtensions. If a user were tricked in to installing a specially crafted extension, an attacker could potentially exploit these to download and open non-executable files without interaction, or obtain elevated privileges. (CVE-2017-7816, CVE-2017-7821). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id103667
    published2017-10-05
    reporterUbuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103667
    titleUbuntu 14.04 LTS / 16.04 LTS / 17.04 : firefox regression (USN-3435-2)
  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_FIREFOX_56_0.NASL
    descriptionThe version of Mozilla Firefox installed on the remote macOS or Mac OS X host is prior to 56. It is, therefore, affected by multiple vulnerabilities, some of which allow code execution and potentially exploitable application crashes.
    last seen2020-06-01
    modified2020-06-02
    plugin id103678
    published2017-10-06
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103678
    titleMozilla Firefox < 56 Multiple Vulnerabilities (macOS)
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_1098A15BB0F642B7B5C78A8646E8BE07.NASL
    descriptionMozilla Foundation reports : CVE-2017-7793: Use-after-free with Fetch API CVE-2017-7817: Firefox for Android address bar spoofing through fullscreen mode CVE-2017-7818: Use-after-free during ARIA array manipulation CVE-2017-7819: Use-after-free while resizing images in design mode CVE-2017-7824: Buffer overflow when drawing and validating elements with ANGLE CVE-2017-7805: Use-after-free in TLS 1.2 generating handshake hashes CVE-2017-7812: Drag and drop of malicious page content to the tab bar can open locally stored files CVE-2017-7814: Blob and data URLs bypass phishing and malware protection warnings CVE-2017-7813: Integer truncation in the JavaScript parser CVE-2017-7825: OS X fonts render some Tibetan and Arabic unicode characters as spaces CVE-2017-7815: Spoofing attack with modal dialogs on non-e10s installations CVE-2017-7816: WebExtensions can load about: URLs in extension UI CVE-2017-7821: WebExtensions can download and open non-executable files without user interaction CVE-2017-7823: CSP sandbox directive did not create a unique origin CVE-2017-7822: WebCrypto allows AES-GCM with 0-length IV CVE-2017-7820: Xray wrapper bypass with new tab and web console CVE-2017-7811: Memory safety bugs fixed in Firefox 56 CVE-2017-7810: Memory safety bugs fixed in Firefox 56 and Firefox ESR 52.4
    last seen2020-06-01
    modified2020-06-02
    plugin id103556
    published2017-09-29
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103556
    titleFreeBSD : mozilla -- multiple vulnerabilities (1098a15b-b0f6-42b7-b5c7-8a8646e8be07)

References