ID CVE-2017-7820
Summary The "instanceof" operator can bypass the Xray wrapper mechanism. When called on web content from the browser itself or an extension the web content can provide its own result for that operator, possibly tricking the browser or extension into mishandling the element. This vulnerability affects Firefox < 56.
References
Vulnerable Configurations
  • Mozilla Firefox 55.0.3
    cpe:2.3:a:mozilla:firefox:55.0.3
CVSS
Base: 5.0
Impact:
Exploitability:
CWE CWE-19
CAPEC
  • 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.
  • XML Nested Payloads
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By nesting XML data and causing this data to be continuously self-referential, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization. An attacker's goal is to leverage parser failure to his or her advantage. In most cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it may be possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.230.1].
  • XML Oversized Payloads
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By supplying oversized payloads in input vectors that will be processed by the XML parser, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization, and potentially cause execution of arbitrary code. An attacker's goal is to leverage parser failure to his or her advantage. In many cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it is possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.231.1].
  • XML Client-Side Attack
    Client applications such as web browsers that process HTML data often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.484.1]
  • XML Parser Attack
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.99.1]
nessus via4
  • NASL family Windows
    NASL id MOZILLA_FIREFOX_56_0.NASL
    description 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.
    last seen 2019-02-21
    modified 2018-07-16
    plugin id 103680
    published 2017-10-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=103680
    title Mozilla Firefox < 56 Multiple Vulnerabilities
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-3435-1.NASL
    description 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 seen 2019-02-21
    modified 2018-12-01
    plugin id 103646
    published 2017-10-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=103646
    title Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : firefox vulnerabilities (USN-3435-1)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_1098A15BB0F642B7B5C78A8646E8BE07.NASL
    description Mozilla 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 seen 2019-02-21
    modified 2018-11-10
    plugin id 103556
    published 2017-09-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=103556
    title FreeBSD : mozilla -- multiple vulnerabilities (1098a15b-b0f6-42b7-b5c7-8a8646e8be07)
  • NASL family MacOS X Local Security Checks
    NASL id MACOSX_FIREFOX_56_0.NASL
    description The 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 seen 2019-02-21
    modified 2018-07-14
    plugin id 103678
    published 2017-10-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=103678
    title Mozilla Firefox < 56 Multiple Vulnerabilities (macOS)
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-3435-2.NASL
    description USN-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 seen 2019-02-21
    modified 2018-12-01
    plugin id 103667
    published 2017-10-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=103667
    title Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : firefox regression (USN-3435-2)
refmap via4
bid 101057
confirm
sectrack 1039465
Last major update 11-06-2018 - 17:29
Published 11-06-2018 - 17:29
Last modified 25-06-2018 - 15:25
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