USN-3874-1: Firefox vulnerabilities

Releases

• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• firefox - Mozilla Open Source web browser

Details

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,
CVE-2018-18504, CVE-2018-18505)

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)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.10

• firefox - 65.0+build2-0ubuntu0.18.10.1

Ubuntu 18.04

• firefox - 65.0+build2-0ubuntu0.18.04.1

Ubuntu 16.04

• firefox - 65.0+build2-0ubuntu0.16.04.1

Ubuntu 14.04

• firefox - 65.0+build2-0ubuntu0.14.04.1

After a standard system update you need to restart Firefox to make
all the necessary changes.

References

• CVE-2018-18500
• CVE-2018-18501
• CVE-2018-18502
• CVE-2018-18503
• CVE-2018-18504
• CVE-2018-18505
• CVE-2018-18506

Related notices

• USN-3897-1
• USN-3927-1