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USN-3260-1: Firefox vulnerabilities

21 April 2017

Firefox could be made to crash or run programs as your login if it opened a malicious website.

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  • 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 read uninitialized memory, obtain sensitive
information, spoof the addressbar contents or other UI elements, escape
the sandbox to read local files, conduct cross-site scripting (XSS)
attacks, cause a denial of service via application crash, or execute
arbitrary code. (CVE-2017-5429, CVE-2017-5430, CVE-2017-5432,
CVE-2017-5433, CVE-2017-5434, CVE-2017-5435, CVE-2017-5436, CVE-2017-5437,
CVE-2017-5438, CVE-2017-5439, CVE-2017-5440, CVE-2017-5441, CVE-2017-5442,
CVE-2017-5443, CVE-2017-5444, CVE-2017-5445, CVE-2017-5446, CVE-2017-5447,
CVE-2017-5448, CVE-2017-5449, CVE-2017-5451, CVE-2017-5453, CVE-2017-5454,
CVE-2017-5455, CVE-2017-5456, CVE-2017-5458, CVE-2017-5459, CVE-2017-5460,
CVE-2017-5461, CVE-2017-5464, CVE-2017-5465, CVE-2017-5466, CVE-2017-5467,
CVE-2017-5468, CVE-2017-5469)

A flaw was discovered in the DRBG number generation in NSS. If an
attacker were able to perform a machine-in-the-middle attack, this flaw
could potentially be exploited to view sensitive information.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 17.04
Ubuntu 16.10
Ubuntu 16.04
Ubuntu 14.04

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

Related notices

  • USN-3278-1: thunderbird-locale-en-us, thunderbird-locale-en-gb, thunderbird-locale-cy, thunderbird-locale-eu, thunderbird-locale-nn, thunderbird-locale-sq, thunderbird-gnome-support, thunderbird-locale-mk, thunderbird-locale-he, thunderbird-locale-hy, thunderbird-locale-sk, thunderbird-locale-es-es, xul-ext-lightning, thunderbird-locale-pt-br, thunderbird-locale-ta, thunderbird-locale-is, thunderbird-locale-ga-ie, thunderbird-locale-hsb, thunderbird-locale-bn, thunderbird-locale-br, thunderbird-locale-uk, thunderbird-locale-ast, thunderbird-locale-nb-no, thunderbird-locale-vi, thunderbird-locale-fr, thunderbird-locale-ja, thunderbird-locale-id, thunderbird-locale-ca, thunderbird-locale-lt, thunderbird-locale-tr, thunderbird-locale-pt-pt, thunderbird-locale-fy, thunderbird-locale-ka, thunderbird-locale-zh-cn, thunderbird-locale-sr, thunderbird-locale-si, thunderbird-locale-be, thunderbird-locale-pl, thunderbird-mozsymbols, thunderbird-locale-sv, thunderbird-locale-nn-no, thunderbird-locale-ru, thunderbird-locale-da, thunderbird-locale-nl, thunderbird-locale-ko, thunderbird-locale-zh-hant, thunderbird-locale-pa, thunderbird-globalmenu, thunderbird-locale-cs, thunderbird-locale-gl, thunderbird-locale-kab, thunderbird-locale-nb, thunderbird-locale-it, thunderbird-locale-es, thunderbird-testsuite, thunderbird-locale-ar, xul-ext-gdata-provider, thunderbird-locale-hu, thunderbird-locale-en, thunderbird-dev, thunderbird-locale-es-ar, thunderbird-locale-de, thunderbird-locale-sv-se, thunderbird-locale-gd, thunderbird-locale-fy-nl, thunderbird-locale-ga, thunderbird-locale-zh-hans, thunderbird-locale-hr, thunderbird-locale-el, thunderbird-locale-pa-in, thunderbird-locale-ro, thunderbird-locale-ta-lk, thunderbird-locale-bn-bd, thunderbird-locale-sl, thunderbird-locale-bg, thunderbird-locale-zh-tw, thunderbird-locale-dsb, thunderbird, thunderbird-locale-pt, thunderbird-locale-rm, xul-ext-calendar-timezones, thunderbird-locale-et, thunderbird-locale-fi, thunderbird-locale-af
  • USN-3372-1: libnss3, nss
  • USN-3270-1: libnss3-dev, libnss3-nssdb, libnss3, libnss3-tools, libnss3-1d, nss