Firefox could be made to crash or run programs as your login if it opened a malicious website.
Gustavo Grieco discovered an out-of-bounds read during XML parsing in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or obtain sensitive information. (CVE-2016-0718)
5 August 2016
A security issue affects these releases of Ubuntu and its derivatives:
Firefox could be made to crash or run programs as your login if it opened a malicious website.
Gustavo Grieco discovered an out-of-bounds read during XML parsing in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or obtain sensitive information. (CVE-2016-0718)
Toni Huttunen discovered that once a favicon is requested from a site, the remote server can keep the network connection open even after the page is closed. A remote attacked could potentially exploit this to track users, resulting in information disclosure. (CVE-2016-2830)
Christian Holler, Tyson Smith, Boris Zbarsky, Byron Campen, Julian Seward, Carsten Book, Gary Kwong, Jesse Ruderman, Andrew McCreight, and Phil Ringnalda discovered multiple memory safety issues in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-2835, CVE-2016-2836)
A buffer overflow was discovered in the ClearKey Content Decryption Module (CDM) during video playback. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via plugin process crash, or, in combination with another vulnerability to escape the GMP sandbox, execute arbitrary code. (CVE-2016-2837)
Atte Kettunen discovered a buffer overflow when rendering SVG content in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-2838)
Bert Massop discovered a crash in Cairo with version 0.10 of FFmpeg. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to execute arbitrary code. (CVE-2016-2839)
Catalin Dumitru discovered that URLs of resources loaded after a navigation start could be leaked to the following page via the Resource Timing API. An attacker could potentially exploit this to obtain sensitive information. (CVE-2016-5250)
Firas Salem discovered an issue with non-ASCII and emoji characters in data: URLs. An attacker could potentially exploit this to spoof the addressbar contents. (CVE-2016-5251)
Georg Koppen discovered a stack buffer underflow during 2D graphics rendering in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5252)
Abhishek Arya discovered a use-after-free when the alt key is used with top-level menus. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5254)
Jukka Jylänki discovered a crash during garbage collection. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to execute arbitrary code. (CVE-2016-5255)
Looben Yang discovered a use-after-free in WebRTC. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5258)
Looben Yang discovered a use-after-free when working with nested sync events in service workers. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5259)
Mike Kaply discovered that plain-text passwords can be stored in session restore if an input field type is changed from “password” to “text” during a session, leading to information disclosure. (CVE-2016-5260)
Samuel Groß discovered an integer overflow in WebSockets during data buffering in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5261)
Nikita Arykov discovered that JavaScript event handlers on a <marquee> element can execute in a sandboxed iframe without the allow-scripts flag set. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to conduct cross-site scripting (XSS) attacks. (CVE-2016-5262)
A type confusion bug was discovered in display transformation during rendering. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5263)
A use-after-free was discovered when applying effects to SVG elements in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5264)
Abdulrahman Alqabandi discovered a same-origin policy violation relating to local HTML files and saved shortcut files. An attacker could potentially exploit this to obtain sensitive information. (CVE-2016-5265)
Rafael Gieschke discovered an information disclosure issue related to drag and drop. An attacker could potentially exploit this to obtain sensitive information. (CVE-2016-5266)
A text injection issue was discovered with about: URLs. An attacker could potentially exploit this to spoof internal error pages. (CVE-2016-5268)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Firefox to make all the necessary changes.
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