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Ubuntu: 2917-1 Critical: Firefox Buffer Overflow Risk Analysis

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Calendar Grey March 9, 2016
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Tackling multiple Firefox security issues in Ubuntu to mitigate failures or unauthorized activity from malicious websites.
Firefox could be made to crash or run programs as your login if it opened a malicious website.

Summary

Firefox could be made to crash or run programs as your login if it

opened a malicious website.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

Francis Gabriel discovered a buffer overflow during ASN.1 decoding in NSS.

If a user were tricked in to opening a specially crafted website, an

attacker could potentially exploit this to cause a denial of service via

application crash, or execute arbitrary code with the privileges of the

user invoking Firefox. (CVE-2016-1950)

Bob Clary, Christoph Diehl, Christian Holler, Andrew McCreight, Daniel

Holbert, Jesse Ruderman, Randell Jesup, Carsten Book, Gian-Carlo Pascutto,

Tyson Smith, Andrea Marchesini, and Jukka Jylänki discovered multiple

memory safety issues 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, or execute arbitrary code

with the privileges of the user invo...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow code execution firefox ubuntu memory safety

Update Instructions

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

Ubuntu 15.10:
  firefox                         45.0+build2-0ubuntu0.15.10.1

Ubuntu 14.04 LTS:
  firefox                         45.0+build2-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  firefox                         45.0+build2-0ubuntu0.12.04.1

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

References

https://ubuntu.com/security/notices/USN-2917-1

CVE-2016-1950, CVE-2016-1952, CVE-2016-1953, CVE-2016-1954,

CVE-2016-1955, CVE-2016-1956, CVE-2016-1957, CVE-2016-1958,

CVE-2016-1959, CVE-2016-1960, CVE-2016-1961, CVE-2016-1962,

CVE-2016-1963, CVE-2016-1964, CVE-2016-1965, CVE-2016-1966,

CVE-2016-1967, CVE-2016-1968, CVE-2016-1973, CVE-2016-1974,

CVE-2016-1977, CVE-2016-2790, CVE-2016-2791, CVE-2016-2792,

CVE-2016-2793, CVE-2016-2794, CVE-2016-2795, CVE-2016-2796,

CVE-2016-2797, CVE-2016-2798, CVE-2016-2799, CVE-2016-2800,

CVE-2016-2801, CVE-2016-2802

Severity
critical
Lowest
Low
Medium
High
Critical

March 09, 2016

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow code execution firefox ubuntu memory safety

Package Information

https://launchpad.net/ubuntu/+source/firefox/45.0+build2-0ubuntu0.15.10.1
https://launchpad.net/ubuntu/+source/firefox/45.0+build2-0ubuntu0.14.04.1
https://launchpad.net/ubuntu/+source/firefox/45.0+build2-0ubuntu0.12.04.1

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