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USN-3435-1: Firefox vulnerabilities

2 October 2017

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

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Releases

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 read uninitialized memory, obtain sensitive
information, bypass phishing and malware protection, spoof the origin in
modal dialogs, conduct cross-site scripting (XSS) attacks, cause a denial
of service via application crash, or execute arbitrary code.
(CVE-2017-7793, CVE-2017-7810, CVE-2017-7811, CVE-2017-7812,
CVE-2017-7813, CVE-2017-7814, CVE-2017-7815, CVE-2017-7818, CVE-2017-7819,
CVE-2017-7820, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824)

Martin Thomson discovered that NSS incorrectly generated handshake hashes.
A remote attacker could potentially exploit this to cause a denial of
service via application crash, or execute arbitrary code. (CVE-2017-7805)

Multiple security issues were discovered in WebExtensions. If a user were
tricked in to installing a specially crafted extension, an attacker could
potentially exploit these to download and open non-executable files
without interaction, or obtain elevated privileges. (CVE-2017-7816,
CVE-2017-7821)

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 16.04
Ubuntu 14.04

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

Related notices

  • USN-3436-1: thunderbird-locale-ca, thunderbird-locale-ko, thunderbird-locale-pa-in, thunderbird-dev, thunderbird-globalmenu, thunderbird-locale-ga, thunderbird-locale-sv-se, thunderbird-locale-fr, thunderbird-locale-nb, thunderbird-locale-si, thunderbird-locale-zh-hant, thunderbird-locale-gl, thunderbird-locale-sr, thunderbird-locale-vi, thunderbird-locale-en, thunderbird-locale-nl, thunderbird-locale-af, thunderbird-locale-uk, thunderbird-locale-en-gb, thunderbird-locale-ru, thunderbird-mozsymbols, thunderbird-locale-et, thunderbird-locale-hr, thunderbird-locale-nn-no, xul-ext-calendar-timezones, thunderbird-locale-ar, thunderbird-locale-rm, thunderbird-locale-is, thunderbird-locale-tr, thunderbird-locale-fy, thunderbird-locale-bg, thunderbird-locale-sv, thunderbird-locale-nb-no, thunderbird-locale-nn, thunderbird-locale-es, thunderbird-locale-sk, thunderbird-locale-kab, thunderbird-locale-fy-nl, thunderbird-testsuite, thunderbird-locale-hu, thunderbird-gnome-support, thunderbird-locale-pt, thunderbird-locale-sq, thunderbird-locale-pt-br, thunderbird-locale-eu, thunderbird-locale-ro, thunderbird-locale-zh-cn, xul-ext-gdata-provider, thunderbird-locale-it, thunderbird-locale-ast, thunderbird-locale-ga-ie, thunderbird-locale-lt, thunderbird-locale-gd, thunderbird-locale-cy, thunderbird-locale-ja, thunderbird-locale-fi, thunderbird-locale-be, thunderbird-locale-pa, thunderbird-locale-ka, thunderbird-locale-cs, thunderbird-locale-ta, thunderbird-locale-da, thunderbird-locale-es-ar, thunderbird, thunderbird-locale-el, thunderbird-locale-zh-tw, thunderbird-locale-id, thunderbird-locale-ta-lk, thunderbird-locale-dsb, thunderbird-locale-br, thunderbird-locale-en-us, thunderbird-locale-pt-pt, xul-ext-lightning, thunderbird-locale-mk, thunderbird-locale-hy, thunderbird-locale-bn, thunderbird-locale-es-es, thunderbird-locale-sl, thunderbird-locale-pl, thunderbird-locale-de, thunderbird-locale-he, thunderbird-locale-bn-bd, thunderbird-locale-zh-hans, thunderbird-locale-hsb
  • USN-3431-1: libnss3-dev, libnss3, libnss3-nssdb, libnss3-1d, libnss3-tools, nss
  • USN-3688-1: libmozjs-52-0, libmozjs-52-dev, mozjs52