USN-3516-1: Firefox vulnerabilities

05 January 2018

Firefox could be made to expose sensitive information.

Releases

Packages

  • firefox - Mozilla Open Source web browser

Details

It was discovered that speculative execution performed by modern CPUs
could leak information through a timing side-channel attack, and that
this could be exploited in web browser JavaScript engines. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit this to obtain sensitive information from other
domains, bypassing same-origin restrictions. (CVE-2017-5715,
CVE-2017-5753, CVE-2017-5754).

Update instructions

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

Ubuntu 17.10
Ubuntu 17.04
Ubuntu 16.04
Ubuntu 14.04

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

Related notices

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  • USN-3690-1: amd64-microcode
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  • USN-3583-1: linux-image-3.13.0-142-generic, linux-image-3.13.0-142-powerpc-e500mc, linux-image-3.13.0-142-generic-lpae, linux, linux-image-3.13.0-142-lowlatency, linux-image-3.13.0-142-powerpc64-emb, linux-image-3.13.0-142-powerpc64-smp, linux-image-3.13.0-142-powerpc-e500, linux-image-3.13.0-142-powerpc-smp, linux-image-extra-3.13.0-142-generic
  • USN-3597-2: linux-image-4.13.0-37-generic-lpae, linux-hwe, linux-image-4.13.0-37-lowlatency, linux-image-4.13.0-37-generic, linux-image-extra-4.13.0-37-generic
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