Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-5131-1: Firefox vulnerabilities

3 November 2021

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

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

Releases

Packages

  • firefox - Mozilla Open Source web browser

Details

Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass security
restrictions, spoof the browser UI, confuse the user, conduct phishing
attacks, or execute arbitrary code. (CVE-2021-38503, CVE-2021-38504,
CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509)

It was discovered that the 'Copy Image Link' context menu action
would copy the final image URL after redirects. If a user were tricked
into copying and pasting a link for an embedded image that triggered
authentication flows back to the page, an attacker could potentially
exploit this to steal authentication tokens.

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 21.10
Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04

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

Related notices

  • USN-5152-1: thunderbird-locale-ta, thunderbird-locale-uz, thunderbird-dev, thunderbird-locale-kk, thunderbird-locale-zh-hant, thunderbird-locale-da, thunderbird-locale-es-es, thunderbird-locale-el, thunderbird, thunderbird-locale-nb-no, thunderbird-locale-id, thunderbird-locale-th, thunderbird-locale-uk, thunderbird-locale-es, thunderbird-locale-en, thunderbird-locale-it, thunderbird-locale-hsb, thunderbird-locale-en-us, thunderbird-locale-kab, thunderbird-locale-nn, xul-ext-calendar-timezones, xul-ext-gdata-provider, thunderbird-locale-pa, thunderbird-locale-sr, thunderbird-locale-si, thunderbird-locale-eu, thunderbird-locale-sl, thunderbird-locale-bg, thunderbird-locale-tr, thunderbird-locale-de, thunderbird-locale-cy, thunderbird-locale-zh-cn, thunderbird-gnome-support, thunderbird-locale-es-ar, thunderbird-locale-nb, xul-ext-lightning, thunderbird-mozsymbols, thunderbird-locale-pt-pt, thunderbird-locale-af, thunderbird-locale-cak, thunderbird-locale-ro, thunderbird-locale-ar, thunderbird-locale-sv-se, thunderbird-locale-br, thunderbird-locale-ga, thunderbird-locale-cs, thunderbird-locale-zh-hans, thunderbird-locale-pt, thunderbird-locale-nl, thunderbird-locale-bn, thunderbird-locale-pa-in, thunderbird-locale-ja, thunderbird-locale-fi, thunderbird-locale-ta-lk, thunderbird-locale-pl, thunderbird-locale-be, thunderbird-locale-fy, thunderbird-locale-fa, thunderbird-locale-ru, thunderbird-locale-rm, thunderbird-locale-bn-bd, thunderbird-locale-ca, thunderbird-locale-ms, thunderbird-locale-zh-tw, thunderbird-locale-sv, thunderbird-locale-dsb, thunderbird-locale-lt, thunderbird-locale-hr, thunderbird-locale-sq, thunderbird-locale-en-gb, thunderbird-locale-fy-nl, thunderbird-locale-hu, thunderbird-locale-pt-br, thunderbird-locale-is, thunderbird-locale-fr, thunderbird-locale-ast, thunderbird-locale-he, thunderbird-locale-gd, thunderbird-locale-nn-no, thunderbird-locale-ga-ie, thunderbird-locale-hy, thunderbird-locale-gl, thunderbird-locale-ka, thunderbird-locale-lv, thunderbird-locale-ko, thunderbird-locale-mk, thunderbird-locale-sk, thunderbird-locale-et, thunderbird-locale-vi
  • USN-5248-1: thunderbird-locale-ta, thunderbird-locale-uz, thunderbird-dev, thunderbird-locale-kk, thunderbird-locale-zh-hant, thunderbird-locale-da, thunderbird-locale-es-es, thunderbird-locale-el, thunderbird, thunderbird-locale-nb-no, thunderbird-locale-id, thunderbird-locale-th, thunderbird-locale-uk, thunderbird-locale-es, thunderbird-locale-en, thunderbird-locale-it, thunderbird-locale-hsb, thunderbird-locale-en-us, thunderbird-locale-kab, thunderbird-locale-nn, xul-ext-calendar-timezones, xul-ext-gdata-provider, thunderbird-locale-pa, thunderbird-locale-sr, thunderbird-locale-si, thunderbird-locale-eu, thunderbird-locale-sl, thunderbird-locale-bg, thunderbird-locale-tr, thunderbird-locale-de, thunderbird-locale-cy, thunderbird-locale-zh-cn, thunderbird-gnome-support, thunderbird-locale-es-ar, thunderbird-locale-nb, xul-ext-lightning, thunderbird-mozsymbols, thunderbird-locale-pt-pt, thunderbird-locale-af, thunderbird-locale-cak, thunderbird-locale-ro, thunderbird-locale-ar, thunderbird-locale-sv-se, thunderbird-locale-br, thunderbird-locale-ga, thunderbird-locale-cs, thunderbird-locale-zh-hans, thunderbird-locale-pt, thunderbird-locale-nl, thunderbird-locale-bn, thunderbird-locale-pa-in, thunderbird-locale-ja, thunderbird-locale-fi, thunderbird-locale-ta-lk, thunderbird-locale-pl, thunderbird-locale-be, thunderbird-locale-fy, thunderbird-locale-fa, thunderbird-locale-ru, thunderbird-locale-rm, thunderbird-locale-bn-bd, thunderbird-locale-ca, thunderbird-locale-ms, thunderbird-locale-zh-tw, thunderbird-locale-sv, thunderbird-locale-dsb, thunderbird-locale-lt, thunderbird-locale-hr, thunderbird-locale-sq, thunderbird-locale-en-gb, thunderbird-locale-fy-nl, thunderbird-locale-hu, thunderbird-locale-pt-br, thunderbird-locale-is, thunderbird-locale-fr, thunderbird-locale-ast, thunderbird-locale-he, thunderbird-locale-gd, thunderbird-locale-nn-no, thunderbird-locale-ga-ie, thunderbird-locale-hy, thunderbird-locale-gl, thunderbird-locale-ka, thunderbird-locale-lv, thunderbird-locale-ko, thunderbird-locale-mk, thunderbird-locale-sk, thunderbird-locale-et, thunderbird-locale-vi