Mozilla Foundation Security Advisory 2017-18
Security vulnerabilities fixed in Firefox 55
- Announced
- August 8, 2017
- Impact
- critical
- Products
- Firefox
- Fixed in
-
- Firefox 55
#CVE-2017-7798: XUL injection in the style editor in devtools
- Reporter
- Frederik Braun
- Impact
- critical
Description
The Developer Tools feature suffers from a XUL injection vulnerability due to improper sanitization of the web page source code. In the worst case, this could allow arbitrary code execution when opening a malicious page with the style editor tool.
References
#CVE-2017-7800: Use-after-free in WebSockets during disconnection
- Reporter
- Looben Yang
- Impact
- critical
Description
A use-after-free vulnerability can occur in WebSockets when the object holding the connection is freed before the disconnection operation is finished. This results in an exploitable crash.
References
#CVE-2017-7801: Use-after-free with marquee during window resizing
- Reporter
- Nils
- Impact
- critical
Description
A use-after-free vulnerability can occur while re-computing layout for a marquee element during window resizing where the updated style object is freed while still in use. This results in a potentially exploitable crash.
References
#CVE-2017-7809: Use-after-free while deleting attached editor DOM node
- Reporter
- Nils
- Impact
- high
Description
A use-after-free vulnerability can occur when an editor DOM node is deleted prematurely during tree traversal while still bound to the document. This results in a potentially exploitable crash.
References
#CVE-2017-7784: Use-after-free with image observers
- Reporter
- Nils
- Impact
- high
Description
A use-after-free vulnerability can occur when reading an image observer during frame reconstruction after the observer has been freed. This results in a potentially exploitable crash.
References
#CVE-2017-7802: Use-after-free resizing image elements
- Reporter
- Nils
- Impact
- high
Description
A use-after-free vulnerability can occur when manipulating the DOM during the resize event of an image element. If these elements have been freed due to a lack of strong references, a potentially exploitable crash may occur when the freed elements are accessed.
References
#CVE-2017-7785: Buffer overflow manipulating ARIA attributes in DOM
- Reporter
- Nils
- Impact
- high
Description
A buffer overflow can occur when manipulating Accessible Rich Internet Applications (ARIA) attributes within the DOM. This results in a potentially exploitable crash.
References
#CVE-2017-7786: Buffer overflow while painting non-displayable SVG
- Reporter
- Nils
- Impact
- high
Description
A buffer overflow can occur when the image renderer attempts to paint non-displayable SVG elements. This results in a potentially exploitable crash.
References
#CVE-2017-7806: Use-after-free in layer manager with SVG
- Reporter
- Nils
- Impact
- high
Description
A use-after-free vulnerability can occur when the layer manager is freed too early when rendering specific SVG content, resulting in a potentially exploitable crash.
References
#CVE-2017-7753: Out-of-bounds read with cached style data and pseudo-elements
- Reporter
- SkyLined
- Impact
- high
Description
An out-of-bounds read occurs when applying style rules to pseudo-elements, such as ::first-line, using cached style data.
References
#CVE-2017-7787: Same-origin policy bypass with iframes through page reloads
- Reporter
- Oliver Wagner
- Impact
- high
Description
Same-origin policy protections can be bypassed on pages with embedded iframes during page reloads, allowing the iframes to access content on the top level page, leading to information disclosure.
References
#CVE-2017-7807: Domain hijacking through AppCache fallback
- Reporter
- Mathias Karlsson
- Impact
- high
Description
A mechanism that uses AppCache to hijack a URL in a domain using fallback by serving the files from a sub-path on the domain. This has been addressed by requiring fallback files be inside the manifest directory.
References
#CVE-2017-7792: Buffer overflow viewing certificates with an extremely long OID
- Reporter
- Fraser Tweedale
- Impact
- high
Description
A buffer overflow will occur when viewing a certificate in the certificate manager if the certificate has an extremely long object identifier (OID). This results in a potentially exploitable crash.
References
#CVE-2017-7804: Memory protection bypass through WindowsDllDetourPatcher
- Reporter
- Stephen Fewer
- Impact
- high
Description
The destructor function for the WindowsDllDetourPatcher class can be re-purposed by malicious code in concert with another vulnerability to write arbitrary data to an attacker controlled location in memory. This can be used to bypass existing memory protections in this situation.
Note: This attack only affects Windows operating systems. Other operating systems are not affected.
References
#CVE-2017-7791: Spoofing following page navigation with data: protocol and modal alerts
- Reporter
- Jose María Acuña
- Impact
- moderate
Description
On pages containing an iframe, the data: protocol can be used to create a modal alert that will render over arbitrary domains following page navigation, spoofing of the origin of the modal alert from the iframe content.
References
#CVE-2017-7808: CSP information leak with frame-ancestors containing paths
- Reporter
- Jun Kokatsu
- Impact
- moderate
Description
A content security policy (CSP) frame-ancestors directive containing origins with paths allows for comparisons against those paths instead of the origin. This results in a cross-origin information leak of this path information.
References
#CVE-2017-7782: WindowsDllDetourPatcher allocates memory without DEP protections
- Reporter
- Arthur Edelstein
- Impact
- moderate
Description
An error in the WindowsDllDetourPatcher where a RWX ("Read/Write/Execute") 4k block is allocated but never protected, violating DEP protections.
Note: This attack only affects Windows operating systems. Other operating systems are not affected.
References
#CVE-2017-7781: Elliptic curve point addition error when using mixed Jacobian-affine coordinates
- Reporter
- Antonio Sanso
- Impact
- moderate
Description
An error occurs in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates where it can yield a result POINT_AT_INFINITY when it should not. A man-in-the-middle attacker could use this to interfere with a connection, resulting in an attacked party computing an incorrect shared secret.
References
#CVE-2017-7794: Linux file truncation via sandbox broker
- Reporter
- Jann Horn
- Impact
- moderate
Description
On Linux systems, if the content process is compromised, the sandbox broker will allow files to be truncated even though the sandbox explicitly only has read access to the local file system and no write permissions.
Note: This attack only affects the Linux operating system. Other operating systems are not affected.
References
#CVE-2017-7803: CSP containing 'sandbox' improperly applied
- Reporter
- Rhys Enniks
- Impact
- moderate
Description
When a page’s content security policy (CSP) header contains a sandbox directive, other directives are ignored. This results in the incorrect enforcement of CSP.
References
#CVE-2017-7799: Self-XSS XUL injection in about:webrtc
- Reporter
- Frederik Braun
- Impact
- moderate
Description
JavaScript in the about:webrtc page is not sanitized properly being assigned to innerHTML. Data on this page is supplied by WebRTC usage and is not under third-party control, making this difficult to exploit, but the vulnerability could possibly be used for a cross-site scripting (XSS) attack.
References
#CVE-2017-7783: DOS attack through long username in URL
- Reporter
- Amit Sangra
- Impact
- low
Description
If a long user name is used in a username/password combination in a site URL (such as http://UserName:Password@example.com), the resulting modal prompt will hang in a non-responsive state or crash, causing a denial of service.
References
#CVE-2017-7788: Sandboxed about:srcdoc iframes do not inherit CSP directives
- Reporter
- Muneaki Nishimura
- Impact
- low
Description
When an iframe has a sandbox attribute and its content is specified using srcdoc, that content does not inherit the containing page's Content Security Policy (CSP) as it should unless the sandbox attribute included allow-same-origin.
References
#CVE-2017-7789: Failure to enable HSTS when two STS headers are sent for a connection
- Reporter
- Muneaki Nishimura
- Impact
- low
Description
If a server sends two Strict-Transport-Security (STS) headers for a single connection, they will be rejected as invalid and HTTP Strict Transport Security (HSTS) will not be enabled for the connection.
References
#CVE-2017-7790: Windows crash reporter reads extra memory for some non-null-terminated registry values
- Reporter
- Xiaoyin Liu
- Impact
- low
Description
On Windows systems, if non-null-terminated strings are copied into the crash reporter for some specific registry keys, stack memory data can be copied until a null is found. This can potentially contain private data from the local system.
Note: This attack only affects Windows operating systems. Other operating systems are not affected.
References
#CVE-2017-7796: Windows updater can delete any file named update.log
- Reporter
- Matt Howell
- Impact
- low
Description
On Windows systems, the logger run by the Windows updater deletes the file "update.log" before it runs in order to write a new log of that name. The path to this file is supplied at the command line to the updater and could be used in concert with another local exploit to delete a different file named "update.log" instead of the one intended.
Note: This attack only affects Windows operating systems. Other operating systems are not affected.
References
#CVE-2017-7797: Response header name interning leaks across origins
- Reporter
- Anne van Kesteren
- Impact
- low
Description
Response header name interning does not have same-origin protections and these headers are stored in a global registry. This allows stored header names to be available cross-origin.
References
#CVE-2017-7780: Memory safety bugs fixed in Firefox 55
- Reporter
- Mozilla developers and community
- Impact
- critical
Description
Mozilla developers and community members Gary Kwong, Christian Holler, André Bargull, Bob Clary, Carsten Book, Emilio Cobos Álvarez, Masayuki Nakano, Sebastian Hengst, Franziskus Kiefer, Tyson Smith, and Ronald Crane reported memory safety bugs present in Firefox 54. 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.
References
#CVE-2017-7779: Memory safety bugs fixed in Firefox 55 and Firefox ESR 52.3
- Reporter
- Mozilla developers and community
- Impact
- critical
Description
Mozilla developers and community members Masayuki Nakano, Gary Kwong, Ronald Crane, Andrew McCreight, Tyson Smith, Bevis Tseng, Christian Holler, Bryce Van Dyk, Dragana Damjanovic, Kartikaya Gupta, Philipp, Tristan Bourvon, and Andi-Bogdan Postelnicu reported memory safety bugs present in Firefox 54 and Firefox ESR 52.2. 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.