USN-3874-1: Firefox vulnerabilities
30 January 2019
Firefox could be made to crash or run programs as your login if it opened a malicious website.
- firefox - Mozilla Open Source web browser
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, gain additional
privileges by escaping the sandbox, or execute arbitrary code.
(CVE-2018-18500, CVE-2018-18501, CVE-2018-18502, CVE-2018-18503,
It was discovered that Firefox allowed PAC files to specify that requests
to localhost are sent through the proxy to another server. If proxy
auto-detection is enabled, an attacker could potentially exploit this to
conduct attacks on local services and tools. (CVE-2018-18506)
The problem can be corrected by updating your system to the following package versions:
After a standard system update you need to restart Firefox to make
all the necessary changes.