The file-download dialog in Mozilla Firefox before 44.0 on OS X enables a certain button too quickly, which allows remote attackers to conduct clickjacking attacks via a crafted web site that triggers a single-click action in a situation where a double-click action was intended.

The specific version of Firefox that the system is running is reportedly affected by the following vulnerabilities:

- Brotli contains a flaw in the DecodeVarLenUint8() function in dec/decode.c related to use of uninitialized memory. This may allow a context-dependent attacker to have an unspecified impact. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1930)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains an unspecified flaw that may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. No further details have been provided by the vendor. (CVE-2016-1931)

- Mozilla Firefox contains a flaw in the Downscaler::ClearRow() function in image/Downscaler.cpp. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw in the nsComputedDOMStyle::GetStyleContextForElement() and nsComputedDOMStyle::GetStyleContextForElementNoFlush() functions in layout/style/nsComputedDOMStyle.cpp. The issue is triggered when using a frame that is not in the composed document. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw that is triggered when handling fuctions accepting rest parameters. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw in the CodeGeneratorShared::allocateData() function in js/src/jit/shared/CodeGenerator-shared.h that is triggered when handling out-of-memory error conditions. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw in the VCMGenericEncoder::Release() function in media/webrtc/trunk/webrtc/modules/video_coding/main/source/generic_encoder.cc. The issue is triggered as the encoded-frame callback is not unregistered when releasing codec databases. This may allow a context-dependent attacker to potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains an unspecified flaw in js/src/vm/HelperThreads.cpp. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw in the JSRuntime::createJitRuntime() function in js/src/jscompartment.cpp that is triggered when handling out-of-memory error conditions. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains an unspecified flaw that is triggered when handling attribute changes. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw in the HTMLMediaElement::NotifyAddedSource() function in dom/html/HTMLMediaElement.cpp. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw in the nsGIFDecoder2::WriteInternal() function in image/decoders/nsGIFDecoder2.cpp that is triggered when handling GIF image frame bounds. This may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. (CVE-2016-1931)

- Mozilla Firefox contains a flaw that is triggered when handling WebAudio content. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a use-after-free condition in the nsLayoutUtils::SurfaceFromElement() function in dom/html/HTMLMediaElement.cpp. With a specially crafted web page, a context-dependent attacker can dereference already freed memory and potentially execute arbitrary code. (CVE-2016-1930)

- Mozilla Firefox contains a flaw in the Evaluate() function in js/src/shell/js.cpp. With a specially crafted web page, a context-dependent attacker can corrupt memory and potentially execute arbitrary code. (CVE-2016-1931)

- Mozilla Firefox contains an overflow condition in the WebGLContext::BufferData() function in dom/canvas/WebGLContextBuffers.cpp that is triggered when handling cache out-of-memory error conditions. This may allow a context-dependent attacker to cause a buffer overflow and potentially execute arbitrary code. (CVE-2016-1935)

- Mozilla Firefox contains a flaw in the BrowserApp::onTabChanged() function in mobile/android/base/java/org/mozilla/gecko/BrowserApp.java. The issue is triggered when handling page scrolling. This may allow a context-dependent attacker to spoof the location. (CVE-2016-1943)

- Mozilla Firefox contains an integer overflow condition that is triggered when handling GIF images. This may allow a context-dependent attacker to have an unspecified impact. No further details have been provided by the vendor. (CVE-2016-1933)

- Mozilla Firefox contains a flaw in the Buffer11::NativeBuffer11::map() function within the ANGLE implementation. This may allow a context-dependent attacker to corrupt memory and potentially execute arbitrary code. (CVE-2016-1944)

- Mozilla Firefox for Android contains a flaw in mobile/android/chrome/content/browser.js that is triggered when handling data: URLs. This may allow a context-dependent attacker to spoof the location. (CVE-2016-1940)

- Mozilla Firefox contains a flaw in the safe browsing feature as the Application Reputation service was unreachable. This may allow a context-dependent attacker to trick a user into downloading a malicious executable without the user being warned. (CVE-2016-1947)

- Mozilla Firefox contains an integer overflow condition in the MoofParser::Metadata() function in media/libstagefright/binding/MoofParser.cpp. The issue is triggered when handling MP4 file metadata. This may allow a context-dependent attacker to potentially execute arbitrary code. (CVE-2016-1946)

- Mozilla Firefox contains a flaw in modules/libjar/nsZipArchive.cpp that is triggered when handling ZIP files. This may allow a context-dependent attacker to have an unspecified impact. (CVE-2016-1945)

- Mozilla Firefox contains a flaw in the nsCookieService::SetCookieInternal() function in netwerk/cookie/nsCookieService.cpp as control characters are permitted in cookie names. This may allow a context-dependent attacker to inject cookies. (CVE-2016-1939)

- Mozilla Network Security Services (NSS) contains an unspecified cryptographical issue when handling calculations that contain mp_div or mp_exptmod. This may allow an attacker to trigger potential cryptographic weaknesses. (CVE-2016-1938)

- Mozilla Firefox for Android contains a flaw in mobile/android/chrome/content/browser.js that is triggered as lightweight themes fail to properly secure connections when installing themes. This may allow a remote man-in-the-middle attacker to make changes to the theme.
 (CVE-2016-1948)

- Mozilla Firefox contains a flaw in the protocol handler in toolkit/mozapps/handling/content/dialog.js that is due to the handler treating double click events as two single click events. This may allow a context-dependent attacker to spoof content to cause a user to potentially perform malicious actions, such as downloading attacker controlled software. (CVE-2016-1937)

- Mozilla Firefox for Mac OS X contains a flaw that is triggered as the delay between the download dialog getting focus and the button getting enabled is too short. If a context-dependent attacker can trick a user into double clicking in a specific location, they can pass the second click through to a dialog below that location. This will allow the attacker to cause the user to perform unintentional actions. (CVE-2016-1941)

- Mozilla Firefox contains a flaw in browser/base/content/urlbarBindings.xml that is triggered during the handling of a URL that is invalid for the internal protocol, which will cause the URL to be pasted into the address bar. This may allow a context-dependent attacker to spoof URLs. (CVE-2016-1942)

- Mozilla Network Security Services (NSS) contains a use-after-free error in the ssl3_HandleECDHServerKeyExchange() function. The issue is triggered when handling failed allocations during DHE and ECDHE handshakes. This may allow a context-dependent attacker to dereference already freed memory and potentially execute arbitrary code. (CVE-2016-1978)

The remote host is affected by the vulnerability described in GLSA-201605-06 (Mozilla Products: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Firefox, NSS, NSPR, and       Thunderbird. Please review the CVE identifiers referenced below for       details.
  Impact :

    A remote attacker could entice a user to view a specially crafted web       page or email, possibly resulting in execution of arbitrary code or a       Denial of Service condition. Furthermore, a remote attacker may be able       to perform Man-in-the-Middle attacks, obtain sensitive information, spoof       the address bar, conduct clickjacking attacks, bypass security       restrictions and protection mechanisms, or have other unspecified       impacts.
  Workaround :

    There is no known workaround at this time.

The version of Firefox is prior to 44.0 and is affected by multiple vulnerabilities : 

 - Multiple unspecified memory corruption issues exist that allow a remote attacker to execute arbitrary code. (CVE-2016-1930, CVE-2016-1931)
 - An integer overflow condition exists due to improper parsing of GIF images during deinterlacing. A remote attacker can exploit this, via a specially crafted GIF image, to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-1933)
 - A buffer overflow condition exists in WebGL that is triggered when handling cache out-of-memory error conditions. A remote attacker can exploit this to execute arbitrary code. (CVE-2016-1935)
 - A content spoofing vulnerability exists due to the protocol handler dialog treating double click events as two single click events. A remote attacker can exploit this to spoof content, allowing the attacker to trick a user into performing malicious actions. (CVE-2016-1937)
 - A cryptographic weakness exists in Network Security Services (NSS) due to incorrect calculations with 'mp_div' and 'mp_exptmod'. (CVE-2016-1938)
 - A cookie injection vulnerability exists due to illegal control characters being permitted in cookie names. A remote attacker can exploit this to inject cookies. (CVE-2016-1939)
 - A flaw exists that is triggered as the delay between the download dialog getting focus and the button getting enabled is too short. If a context-dependent attacker can trick a user into double clicking in a specific location, they can pass the second click through to a dialog below that location. This will allow the attacker to cause the user to perform unintentional actions. (CVE-2016-1941)
 - An URL spoofing vulnerability exists due to a flaw that is triggered during the handling of a URL that invalid for the internal protocol, causing the URL to be pasted into the address bar. A remote attacker can exploit this spoof URLs, allowing the attacker to trick a user into visiting a malicious website. (CVE-2016-1942)
 - An unspecified memory corruption issue exists in the ANGLE graphics library implementation. A remote attacker can exploit this to corrupt memory, resulting in the execution of arbitrary code. (CVE-2016-1944)
 - A wild pointer flaw exists due to improper handling of ZIP files. A remote attacker can exploit this, via a crafted ZIP file, to have an unspecified impact. (CVE-2016-1945)
 - An integer overflow condition exists in the bundled version of libstagefright due to improper handling of MP4 file metadata. A remote attacker can exploit this to execute arbitrary code. (CVE-2016-1946)
 - A flaw exists in the safe browsing feature due to the Application Reputation service being unreachable. A remote attacker can exploit this to convince a user into downloading a malicious executable without being warned. (CVE-2016-1947)

The version of Firefox installed on the remote Mac OS X host is prior to 44. It is, therefore, affected by the following vulnerabilities :

  - A cookie injection vulnerability exists due to illegal     control characters being stored as cookie values in     violation of RFC6265. A remote attacker can exploit this     to inject cookies. (CVE-2015-7208)

  - Multiple unspecified memory corruption issues exist that     allow a remote attacker to execute arbitrary code.
    (CVE-2016-1930, CVE-2016-1931)

  - An integer overflow condition exists due to improper     parsing of GIF images during deinterlacing. A remote     attacker can exploit this, via a specially crafted GIF     image, to cause a denial of service condition or the     execution of arbitrary code. (CVE-2016-1933)

  - A buffer overflow condition exists in WebGL that is     triggered when handling cache out-of-memory error     conditions. A remote attacker can exploit this to     execute arbitrary code. (CVE-2016-1935)

  - A content spoofing vulnerability exists due to the     protocol handler dialog treating double click events as     two single click events. A remote attacker can exploit     this to spoof content, allowing the attacker to trick a     user into performing malicious actions. (CVE-2016-1937)

  - A cryptographic weakness exists in Network Security     Services (NSS) due to incorrect calculations with     'mp_div' and 'mp_exptmod'. (CVE-2016-1938)

  - A cookie injection vulnerability exists due to illegal     control characters being permitted in cookie names. A     remote attacker can exploit this to inject cookies.
    (CVE-2016-1939)

  - An URL spoofing vulnerability exists due to a flaw that     is triggered during the handling of a URL that invalid     for the internal protocol, causing the URL to be pasted     into the address bar. A remote attacker can exploit this     spoof URLs, allowing the attacker to trick a     user into visiting a malicious website. (CVE-2016-1942)

  - An unspecified memory corruption issue exists in the     ANGLE graphics library implementation. A remote attacker     can exploit this to corrupt memory, resulting in the     execution of arbitrary code. (CVE-2016-1944)

  - A wild pointer flaw exists due to improper handling of     ZIP files. A remote attacker can exploit this, via a     crafted ZIP file, to have an unspecified impact.
    (CVE-2016-1945)

  - An integer overflow condition exists in the bundled     version of libstagefright due to improper handling of     MP4 file metadata. A remote attacker can exploit this     to execute arbitrary code. (CVE-2016-1946)

  - A flaw exists in the safe browsing feature due to the     Application Reputation service being unreachable. A     remote attacker can exploit this to convince a user     into downloading a malicious executable without being     warned. (CVE-2016-1947)

  - A use-after-free error exists in Network Security     Services (NSS) due to improper handling of failed     allocations during DHE and ECDHE handshakes. An attacker     can exploit this to dereference already freed memory,     resulting in the execution of arbitrary code.
    (CVE-2016-1978)

ID	Name	Product	Family	Severity
802019	Firefox < 44 Multiple Vulnerabilities	Log Correlation Engine	Web Clients	critical
91379	GLSA-201605-06 : Mozilla Products: Multiple vulnerabilities (Logjam) (SLOTH)	Nessus	Gentoo Local Security Checks	critical
9075	Mozilla Firefox < 44.0 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	critical
88459	Firefox < 44 Multiple Vulnerabilities (Mac OS X)	Nessus	MacOS X Local Security Checks	critical

Detections

Analytics

CVE-2016-1941

medium

Tenable Plugins

critical

critical

critical

critical