USN-4122-1: Firefox vulnerabilities

04 September 2019

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

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 obtain sensitive information, bypass Content
Security Policy (CSP) protections, bypass same-origin restrictions,
conduct cross-site scripting (XSS) attacks, cause a denial of service, or
execute arbitrary code. (CVE-2019-5849, CVE-2019-11734, CVE-2019-11735,
CVE-2019-11737, CVE-2019-11738, CVE-2019-11740, CVE-2019-11742,
CVE-2019-11743, CVE-2019-11744, CVE-2019-11746, CVE-2019-11748,
CVE-2019-11749, CVE-2019-11750, CVE-2019-11752)

It was discovered that a compromised content process could log in to a
malicious Firefox Sync account. An attacker could potentially exploit
this, in combination with another vulnerability, to disable the sandbox.
(CVE-2019-9812)

It was discovered that addons.mozilla.org and accounts.firefox.com could
be loaded in to the same content process. An attacker could potentially
exploit this, in combination with another vulnerability that allowed a
cross-site scripting (XSS) attack, to modify browser settings.
(CVE-2019-11741)

It was discovered that the "Forget about this site" feature in the history
pane removes HTTP Strict Transport Security (HSTS) settings for sites on
the pre-load list. An attacker could potentially exploit this to bypass
the protections offered by HSTS. (CVE-2019-11747)

Update instructions

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

Ubuntu 19.04
Ubuntu 18.04
Ubuntu 16.04

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

Related notices

  • USN-4150-1: thunderbird-locale-vi, thunderbird-locale-et, thunderbird-locale-dsb, thunderbird-locale-ko, thunderbird-locale-mk, thunderbird-locale-nn-no, thunderbird-locale-be, thunderbird-locale-sq, thunderbird-locale-ga-ie, thunderbird-locale-fi, thunderbird-locale-sk, thunderbird-locale-hr, thunderbird-locale-fy-nl, thunderbird-locale-bg, thunderbird-locale-af, thunderbird-locale-kk, thunderbird-locale-pl, thunderbird-locale-da, thunderbird-locale-id, thunderbird-locale-en-us, thunderbird-locale-zh-hant, thunderbird-locale-it, xul-ext-gdata-provider, thunderbird-locale-zh-tw, thunderbird-locale-pa-in, thunderbird-locale-hy, thunderbird-locale-ca, thunderbird-locale-uk, thunderbird-locale-tr, thunderbird-locale-ast, thunderbird-locale-sv, thunderbird-locale-ta-lk, thunderbird-locale-nl, thunderbird-gnome-support, thunderbird-locale-zh-hans, thunderbird-locale-kab, thunderbird-locale-nb, thunderbird-locale-fr, thunderbird-locale-ar, thunderbird-locale-ja, thunderbird-locale-es-es, thunderbird-locale-hu, thunderbird-locale-sl, thunderbird-locale-es, thunderbird-locale-pt-pt, thunderbird-locale-fy, thunderbird-locale-cs, thunderbird-locale-ru, thunderbird-locale-nn, thunderbird-locale-ga, thunderbird-locale-br, thunderbird-locale-gd, thunderbird-locale-bn-bd, thunderbird-mozsymbols, thunderbird-locale-zh-cn, thunderbird-locale-gl, thunderbird-locale-ro, thunderbird-locale-cy, thunderbird-locale-ms, thunderbird-locale-en-gb, thunderbird-locale-hsb, thunderbird-locale-pa, thunderbird-locale-ta, thunderbird-locale-es-ar, thunderbird-locale-bn, thunderbird-locale-eu, thunderbird-locale-en, thunderbird-locale-nb-no, thunderbird-locale-pt-br, thunderbird-locale-lt, thunderbird-locale-el, thunderbird-locale-is, xul-ext-lightning, thunderbird-globalmenu, thunderbird-locale-de, thunderbird-locale-he, thunderbird-locale-sv-se, thunderbird-locale-sr, thunderbird-dev, thunderbird-locale-si, thunderbird-locale-pt, xul-ext-calendar-timezones, thunderbird, thunderbird-locale-ka, thunderbird-locale-rm