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CVE-2017-7821

Status Candidate

Overview

A vulnerability where WebExtensions can download and attempt to open a file of some non-executable file types. This can be triggered without specific user interaction for the file download and open actions. This could be used to trigger known vulnerabilities in the programs that handle those document types. This vulnerability affects Firefox < 56.

Related Files

Ubuntu Security Notice USN-3435-2
Posted Oct 4, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3435-2 - USN-3435-1 fixed vulnerabilities in Firefox. The update caused the Flash plugin to crash in some circumstances. This update fixes the problem. 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 attacks, cause a denial of service via application crash, or execute arbitrary code. 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. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, spoof, vulnerability, xss
systems | linux, ubuntu
advisories | CVE-2017-7805, CVE-2017-7813, CVE-2017-7814, CVE-2017-7815, CVE-2017-7818, CVE-2017-7819, CVE-2017-7820, CVE-2017-7821, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824
MD5 | f3497adebd97cb8880f571587424512d
Ubuntu Security Notice USN-3435-1
Posted Oct 3, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3435-1 - 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 attacks, cause a denial of service via application crash, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof, xss
systems | linux, ubuntu
advisories | 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-2017-7818, CVE-2017-7819, CVE-2017-7820, CVE-2017-7821, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824
MD5 | f04486fc6c43f2ce047c937967095f07
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