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CVE-2019-9809

Status Candidate

Overview

If the source for resources on a page is through an FTP connection, it is possible to trigger a series of modal alert messages for these resources through invalid credentials or locations. These messages cannot be immediately dismissed, allowing for a denial of service (DOS) attack. This vulnerability affects Firefox < 66.

Related Files

Ubuntu Security Notice USN-3918-2
Posted Mar 25, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3918-2 - USN-3918-1 fixed vulnerabilities in Firefox. This update provides the corresponding updates for Ubuntu 14.04 LTS. 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 cause a denial of service via application crash, denial of service via successive FTP authorization prompts or modal alerts, trick the user with confusing permission request prompts, obtain sensitive information, conduct social engineering attacks, or execute arbitrary code. A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. If a user were tricked in to opening a specially crafted website with Spectre mitigations disabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. It was discovered that Upgrade-Insecure-Requests was incorrectly enforced for same-origin navigation. An attacker could potentially exploit this to conduct man-in-the-middle attacks. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-9788, CVE-2019-9791, CVE-2019-9792, CVE-2019-9793, CVE-2019-9797, CVE-2019-9799, CVE-2019-9803, CVE-2019-9805, CVE-2019-9808, CVE-2019-9809
SHA-256 | baa25a5f9ae8648296e1f99c1966e7547781f61b5bdbdab8d20e439a175726f1
Ubuntu Security Notice USN-3918-1
Posted Mar 22, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3918-1 - 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 cause a denial of service via application crash, denial of service via successive FTP authorization prompts or modal alerts, trick the user with confusing permission request prompts, obtain sensitive information, conduct social engineering attacks, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-9788, CVE-2019-9791, CVE-2019-9792, CVE-2019-9793, CVE-2019-9797, CVE-2019-9799, CVE-2019-9802, CVE-2019-9803, CVE-2019-9805, CVE-2019-9808, CVE-2019-9809
SHA-256 | b4e53350aa233dd662095955993165e828a24f646ecc4eecc6a42c2dd5ddab2b
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