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USN-5782-1: Firefox vulnerabilities

15 December 2022

Several security issues were fixed in Firefox.

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  • firefox - Mozilla Open Source web browser


It was discovered that Firefox was using an out-of-date libusrsctp library.
An attacker could possibly use this library to perform a reentrancy issue
on Firefox. (CVE-2022-46871)

Nika Layzell discovered that Firefox was not performing a check on paste
received from cross-processes. An attacker could potentially exploit this
to obtain sensitive information. (CVE-2022-46872)

Pete Freitag discovered that Firefox did not implement the unsafe-hashes
CSP directive. An attacker who was able to inject markup into a page
otherwise protected by a Content Security Policy may have been able to
inject an executable script. (CVE-2022-46873)

Matthias Zoellner discovered that Firefox was not keeping the filename
ending intact when using the drag-and-drop event. An attacker could
possibly use this issue to add a file with a malicious extension, leading
to execute arbitrary code. (CVE-2022-46874)

Hafiizh discovered that Firefox was not handling fullscreen notifications
when the browser window goes into fullscreen mode. An attacker could
possibly use this issue to spoof the user and obtain sensitive information.

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, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2022-46878,

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 20.04
Ubuntu 18.04

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

Related notices

  • USN-5824-1: thunderbird-locale-bn-bd, thunderbird-locale-br, xul-ext-gdata-provider, thunderbird-locale-da, thunderbird-locale-tr, thunderbird-locale-sr, thunderbird-locale-hsb, thunderbird-locale-be, thunderbird-locale-pl, thunderbird-locale-cy, xul-ext-lightning, thunderbird-locale-kk, thunderbird-locale-lt, thunderbird-locale-pa, thunderbird-locale-si, thunderbird-locale-en, thunderbird-locale-fi, thunderbird-gnome-support, thunderbird, thunderbird-locale-fr, thunderbird-locale-ms, thunderbird-locale-fy, thunderbird-locale-gd, thunderbird-locale-dsb, thunderbird-locale-ru, thunderbird-locale-sq, thunderbird-locale-sk, thunderbird-locale-en-us, thunderbird-locale-eu, thunderbird-locale-ro, thunderbird-locale-es-es, thunderbird-locale-ka, thunderbird-locale-af, thunderbird-locale-lv, thunderbird-locale-nn, thunderbird-locale-sl, thunderbird-locale-ga, thunderbird-locale-cs, thunderbird-locale-ta-lk, thunderbird-locale-id, thunderbird-locale-zh-cn, thunderbird-locale-vi, thunderbird-locale-gl, thunderbird-locale-pa-in, thunderbird-locale-nb, thunderbird-locale-el, thunderbird-locale-rm, thunderbird-locale-zh-hans, thunderbird-locale-mk, thunderbird-locale-ca, thunderbird-locale-he, thunderbird-locale-nn-no, thunderbird-locale-hy, thunderbird-mozsymbols, thunderbird-locale-es-ar, thunderbird-locale-pt-br, thunderbird-locale-de, thunderbird-locale-bn, thunderbird-locale-fy-nl, thunderbird-locale-ga-ie, thunderbird-locale-zh-tw, thunderbird-locale-it, thunderbird-locale-hr, thunderbird-locale-kab, thunderbird-locale-nl, thunderbird-locale-et, thunderbird-locale-en-gb, thunderbird-locale-ja, thunderbird-locale-fa, thunderbird-locale-bg, thunderbird-locale-uk, thunderbird-locale-is, thunderbird-locale-pt-pt, thunderbird-locale-ko, xul-ext-calendar-timezones, thunderbird-dev, thunderbird-locale-ast, thunderbird-locale-sv-se, thunderbird-locale-zh-hant, thunderbird-locale-cak, thunderbird-locale-hu, thunderbird-locale-ta, thunderbird-locale-ar, thunderbird-locale-th, thunderbird-locale-nb-no, thunderbird-locale-uz, thunderbird-locale-pt, thunderbird-locale-es, thunderbird-locale-sv