USN-4202-1: Thunderbird vulnerabilities

26 November 2019

Several security issues were fixed in Thunderbird.

Releases

Packages

  • thunderbird - Mozilla Open Source mail and newsgroup client

Details

It was discovered that a specially crafted S/MIME message with an inner
encryption layer could be displayed as having a valid signature in some
circumstances, even if the signer had no access to the encrypted message.
An attacker could potentially exploit this to spoof the message author.
(CVE-2019-11755)

Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
bypass security restrictions, bypass same-origin restrictions, conduct
cross-site scripting (XSS) attacks, or execute arbitrary code.
(CVE-2019-11757, CVE-2019-11758, CVE-2019-11759, CVE-2019-11760,
CVE-2019-11761, CVE-2019-11762, CVE-2019-11763, CVE-2019-11764)

A heap overflow was discovered in the expat library in Thunderbird. If a
user were tricked in to opening a specially crafted message, an attacker
could potentially exploit this to cause a denial of service, or execute
arbitrary code. (CVE-2019-15903)

Update instructions

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

Ubuntu 19.10
Ubuntu 18.04

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

Related notices

  • USN-4165-1: firefox-locale-bs, firefox-locale-oc, firefox-locale-km, firefox-locale-ml, firefox-mozsymbols, firefox-locale-lg, firefox-locale-te, firefox-locale-ur, firefox-locale-ga, firefox-locale-sk, firefox-locale-ne, firefox-locale-zu, firefox-dev, firefox-locale-cy, firefox-locale-bg, firefox-locale-az, firefox-locale-as, firefox-locale-nso, firefox-locale-or, firefox-locale-nn, firefox-geckodriver, firefox-locale-hsb, firefox-locale-sl, firefox-locale-th, firefox-locale-gl, firefox-locale-ro, firefox-locale-gu, firefox-locale-gd, firefox-locale-csb, firefox-locale-nl, firefox-locale-lt, firefox-locale-sr, firefox-locale-ar, firefox-locale-kn, firefox-locale-be, firefox-locale-sv, firefox-locale-hr, firefox-locale-hu, firefox-locale-gn, firefox-locale-ast, firefox-locale-ko, firefox-locale-mr, firefox-locale-sq, firefox-locale-lv, firefox-locale-fi, firefox-locale-xh, firefox-locale-bn, firefox-locale-eu, firefox-locale-fr, firefox-locale-kab, firefox-locale-kk, firefox-locale-de, firefox-locale-an, firefox-locale-nb, firefox-locale-uk, firefox-locale-da, firefox-locale-ms, firefox-locale-af, firefox-locale-he, firefox-locale-it, firefox-locale-is, firefox-locale-cak, firefox-locale-fy, firefox-locale-ku, firefox-locale-vi, firefox-locale-br, firefox-locale-zh-hant, firefox-locale-id, firefox, firefox-locale-mk, firefox-locale-el, firefox-locale-hi, firefox-locale-pa, firefox-locale-sw, firefox-locale-ca, firefox-locale-my, firefox-locale-ta, firefox-locale-et, firefox-locale-ka, firefox-locale-eo, firefox-locale-tr, firefox-locale-ru, firefox-locale-pt, firefox-locale-es, firefox-locale-si, firefox-locale-en, firefox-locale-mn, firefox-locale-zh-hans, firefox-locale-ja, firefox-locale-fa, firefox-locale-ia, firefox-locale-cs, firefox-locale-uz, firefox-locale-mai, firefox-locale-hy, firefox-locale-pl
  • USN-4132-1: expat, libexpat1, lib64expat1, libexpat1-udeb, lib64expat1-dev, libexpat1-dev
  • USN-4335-1: xul-ext-calendar-timezones, thunderbird, thunderbird-dev, thunderbird-locale-ga-ie, thunderbird-locale-uz, thunderbird-locale-nb-no, thunderbird-locale-br, thunderbird-locale-es-ar, thunderbird-locale-pt-pt, thunderbird-locale-nn-no, thunderbird-locale-hr, thunderbird-locale-pa-in, thunderbird-locale-et, thunderbird-locale-be, thunderbird-locale-en-us, thunderbird-locale-nl, thunderbird-locale-sv-se, thunderbird-locale-ar, thunderbird-locale-ka, thunderbird-locale-ga, thunderbird-locale-bn-bd, thunderbird-locale-is, thunderbird-locale-cy, thunderbird-locale-bg, thunderbird-locale-cak, thunderbird-locale-rm, xul-ext-lightning, thunderbird-locale-vi, thunderbird-locale-ast, thunderbird-locale-ja, thunderbird-locale-hy, thunderbird-locale-zh-cn, thunderbird-locale-sq, thunderbird-locale-dsb, thunderbird-locale-nn, thunderbird-locale-gl, thunderbird-locale-tr, thunderbird-locale-ta, thunderbird-locale-en-gb, thunderbird-locale-es-es, thunderbird-locale-mk, thunderbird-locale-si, thunderbird-locale-fy-nl, thunderbird-locale-sl, thunderbird-locale-fy, thunderbird-locale-ro, thunderbird-locale-sr, thunderbird-locale-kk, thunderbird-locale-pa, thunderbird-locale-zh-hant, thunderbird-locale-zh-tw, thunderbird-locale-lt, thunderbird-locale-en, thunderbird-gnome-support, thunderbird-locale-nb, thunderbird-locale-ta-lk, thunderbird-locale-fi, thunderbird-locale-ru, thunderbird-locale-eu, thunderbird-locale-hu, thunderbird-locale-he, thunderbird-locale-uk, thunderbird-locale-pl, thunderbird-locale-af, thunderbird-mozsymbols, thunderbird-locale-bn, thunderbird-locale-id, thunderbird-locale-da, xul-ext-gdata-provider, thunderbird-locale-de, thunderbird-locale-sk, thunderbird-locale-pt, thunderbird-locale-it, thunderbird-locale-kab, thunderbird-locale-gd, thunderbird-locale-el, thunderbird-locale-ms, thunderbird-locale-hsb, thunderbird-locale-es, thunderbird-locale-ko, thunderbird-locale-ca, thunderbird-locale-cs, thunderbird-locale-sv, thunderbird-locale-zh-hans, thunderbird-locale-pt-br, thunderbird-locale-fr
  • USN-4132-2: expat, libexpat1, lib64expat1, libexpat1-udeb, lib64expat1-dev, libexpat1-dev