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USN-3705-1: Firefox vulnerabilities

5 July 2018

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

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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.

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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 cause a denial of service, read uninitialized
memory, bypass same-origin restrictions, bypass CORS restrictions,
bypass CSRF protections, obtain sensitive information, or execute
arbitrary code. (CVE-2018-5156, CVE-2018-5186, CVE-2018-5187,
CVE-2018-5188, CVE-2018-12358, CVE-2018-12359, CVE-2018-12360,
CVE-2018-12361, CVE-2018-12362, CVE-2018-12363, CVE-2018-12364,
CVE-2018-12365, CVE-2018-12366, CVE-2018-12367, CVE-2018-12370,

A security issue was discovered with WebExtensions. If a user were
tricked in to installing a specially crafted extension, an attacker
could potentially exploit this to obtain full browser permissions.

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 18.04
Ubuntu 17.10
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-3714-1: thunderbird-locale-en, thunderbird-locale-hy, xul-ext-gdata-provider, thunderbird-locale-pl, thunderbird-locale-ko, thunderbird-locale-af, thunderbird-locale-be, thunderbird-locale-fi, thunderbird-locale-et, thunderbird-locale-cs, thunderbird-locale-lt, xul-ext-lightning, thunderbird-locale-gl, thunderbird-locale-tr, thunderbird-locale-fr, thunderbird-locale-bn-bd, thunderbird-locale-bg, thunderbird-locale-sr, thunderbird-locale-si, thunderbird-locale-ast, thunderbird-locale-da, thunderbird-locale-nb, thunderbird-locale-el, thunderbird-locale-ar, thunderbird-locale-rm, thunderbird-locale-fy, thunderbird, thunderbird-locale-zh-hant, thunderbird-locale-ru, thunderbird-locale-hu, thunderbird-locale-kab, thunderbird-locale-pa, thunderbird-locale-pa-in, thunderbird-locale-ga, thunderbird-locale-de, thunderbird-globalmenu, thunderbird-locale-nn-no, thunderbird-locale-br, thunderbird-locale-dsb, thunderbird-locale-nb-no, thunderbird-locale-he, thunderbird-locale-ka, thunderbird-locale-sk, thunderbird-locale-es, thunderbird-testsuite, thunderbird-locale-ga-ie, thunderbird-locale-cy, thunderbird-locale-vi, thunderbird-locale-zh-hans, thunderbird-locale-uk, thunderbird-locale-es-es, thunderbird-dev, thunderbird-locale-ta-lk, thunderbird-locale-ca, thunderbird-locale-ro, thunderbird-locale-id, thunderbird-locale-ta, thunderbird-locale-es-ar, thunderbird-locale-gd, thunderbird-locale-sv-se, thunderbird-locale-nn, thunderbird-locale-pt, thunderbird-locale-zh-tw, thunderbird-locale-zh-cn, thunderbird-gnome-support, thunderbird-locale-sq, thunderbird-locale-hsb, thunderbird-locale-it, thunderbird-locale-ja, xul-ext-calendar-timezones, thunderbird-locale-nl, thunderbird-locale-pt-pt, thunderbird-locale-sv, thunderbird-locale-sl, thunderbird-locale-eu, thunderbird-locale-en-us, thunderbird-locale-fy-nl, thunderbird-locale-mk, thunderbird-locale-hr, thunderbird-locale-is, thunderbird-locale-pt-br, thunderbird-locale-bn, thunderbird-mozsymbols, thunderbird-locale-en-gb
  • USN-3749-1: libmozjs-52-0, libmozjs-52-dev, mozjs52