USN-4995-1: Thunderbird vulnerabilities

22 June 2021

Several security issues were fixed in Thunderbird.

Releases

Packages

  • thunderbird - Mozilla Open Source mail and newsgroup client

Details

Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)

It was discovered that extensions could open popup windows with control
of the window title in some circumstances. If a user were tricked into
installing a specially crafted extension, an attacker could potentially
exploit this to spoof a website and trick the user into providing
credentials. (CVE-2021-23984)

Multiple security issues were discovered in Thunderbird's OpenPGP
integration. If a user were tricked into importing a specially crafted
key in some circumstances, an attacker could potentially exploit this
to cause a denial of service (inability to send encrypted email) or
confuse the user. (CVE-2021-23991, CVE-2021-23992, CVE-2021-23993)

A use-after-free was discovered when Responsive Design Mode was
enabled. If a user were tricked into opening a specially crafted
website with Responsive Design Mode enabled, an attacker could
potentially exploit this to cause a denial of service, or execute
arbitrary code. (CVE-2021-23995)

It was discovered that Thunderbird mishandled ftp URLs with encoded
newline characters. If a user were tricked into clicking on a specially
crafted link, an attacker could potentially exploit this to send arbitrary
FTP commands. (CVE-2021-24002)

It was discovered that Thunderbird wrote signatures to disk and read them
back during verification. A local attacker could potentially exploit this
to replace the data with another signature file. (CVE-2021-29948)

It was discovered that Thunderbird might load an alternative OTR
library. If a user were tricked into copying a specially crafted
library to one of Thunderbird's search paths, an attacker could
potentially exploit this to execute arbitrary code. (CVE-2021-29949)

It was discovered that secret keys imported into Thunderbird were
stored unencrypted. A local attacker could potentially exploit this to
obtain private keys. (CVE-2021-29956)

It was discovered that Thunderbird did not indicate when an inline signed
or encrypted message contained additional unprotected parts.
(CVE-2021-29957)

Update instructions

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

Ubuntu 21.04
Ubuntu 20.10
Ubuntu 20.04

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

Related notices

  • USN-4926-1: firefox-locale-gd, firefox-locale-ro, firefox-locale-uz, firefox-locale-az, firefox-locale-af, firefox-locale-sr, firefox-locale-de, firefox-locale-ca, firefox-mozsymbols, firefox-locale-ko, firefox-locale-mr, firefox-locale-et, firefox-locale-as, firefox-locale-te, firefox-locale-mai, firefox-locale-ne, firefox-locale-ku, firefox-locale-km, firefox-locale-ml, firefox-locale-xh, firefox-locale-kn, firefox-locale-ia, firefox-locale-or, firefox-locale-zh-hant, firefox-locale-sl, firefox-locale-an, firefox-locale-fi, firefox-locale-lv, firefox-locale-nn, firefox-locale-lt, firefox-locale-vi, firefox-locale-id, firefox-locale-ga, firefox-locale-ka, firefox-locale-pa, firefox-locale-hy, firefox-locale-gl, firefox-locale-nso, firefox-locale-fy, firefox-locale-be, firefox-locale-csb, firefox-locale-he, firefox-locale-bg, firefox-locale-hu, firefox-locale-nb, firefox-locale-es, firefox-locale-uk, firefox-locale-da, firefox-locale-th, firefox-locale-pl, firefox-locale-ar, firefox-locale-el, firefox-locale-br, firefox-locale-mn, firefox-locale-cak, firefox-locale-si, firefox-locale-szl, firefox-locale-eo, firefox-locale-cy, firefox-locale-en, firefox-locale-eu, firefox-locale-zh-hans, firefox-locale-cs, firefox-locale-sk, firefox-locale-bs, firefox-locale-it, firefox-locale-is, firefox-locale-hr, firefox-locale-fa, firefox-locale-sw, firefox-locale-hsb, firefox-locale-sq, firefox-locale-my, firefox-locale-hi, firefox-locale-zu, firefox-locale-kk, firefox-locale-ms, firefox-locale-nl, firefox-locale-oc, firefox-locale-kab, firefox-locale-ta, firefox-locale-mk, firefox-locale-tr, firefox-locale-lg, firefox-geckodriver, firefox-locale-gu, firefox-locale-sv, firefox-locale-fr, firefox-locale-ru, firefox-locale-ja, firefox-locale-pt, firefox-locale-ast, firefox-locale-bn, firefox-locale-ur, firefox-locale-gn, firefox-dev, firefox
  • USN-4717-1: firefox-locale-gd, firefox-locale-ro, firefox-locale-uz, firefox-locale-az, firefox-locale-af, firefox-locale-sr, firefox-locale-de, firefox-locale-ca, firefox-mozsymbols, firefox-locale-ko, firefox-locale-mr, firefox-locale-et, firefox-locale-as, firefox-locale-te, firefox-locale-mai, firefox-locale-ne, firefox-locale-ku, firefox-locale-km, firefox-locale-ml, firefox-locale-xh, firefox-locale-kn, firefox-locale-ia, firefox-locale-or, firefox-locale-zh-hant, firefox-locale-sl, firefox-locale-an, firefox-locale-fi, firefox-locale-lv, firefox-locale-nn, firefox-locale-lt, firefox-locale-vi, firefox-locale-id, firefox-locale-ga, firefox-locale-ka, firefox-locale-pa, firefox-locale-hy, firefox-locale-gl, firefox-locale-nso, firefox-locale-fy, firefox-locale-be, firefox-locale-csb, firefox-locale-he, firefox-locale-bg, firefox-locale-hu, firefox-locale-nb, firefox-locale-es, firefox-locale-uk, firefox-locale-da, firefox-locale-th, firefox-locale-pl, firefox-locale-ar, firefox-locale-el, firefox-locale-br, firefox-locale-mn, firefox-locale-cak, firefox-locale-si, firefox-locale-eo, firefox-locale-cy, firefox-locale-en, firefox-locale-eu, firefox-locale-zh-hans, firefox-locale-cs, firefox-locale-sk, firefox-locale-bs, firefox-locale-it, firefox-locale-is, firefox-locale-hr, firefox-locale-fa, firefox-locale-sw, firefox-locale-hsb, firefox-locale-sq, firefox-locale-my, firefox-locale-hi, firefox-locale-zu, firefox-locale-kk, firefox-locale-ms, firefox-locale-nl, firefox-locale-oc, firefox-locale-kab, firefox-locale-ta, firefox-locale-mk, firefox-locale-tr, firefox-locale-lg, firefox-geckodriver, firefox-locale-gu, firefox-locale-sv, firefox-locale-fr, firefox-locale-ru, firefox-locale-ja, firefox-locale-pt, firefox-locale-ast, firefox-locale-bn, firefox-locale-ur, firefox-locale-gn, firefox-dev, firefox
  • USN-4995-2: thunderbird-locale-dsb, thunderbird-locale-it, thunderbird-locale-kk, thunderbird, thunderbird-locale-kab, thunderbird-locale-is, thunderbird-locale-ar, thunderbird-locale-af, thunderbird-locale-th, thunderbird-gnome-support, thunderbird-locale-sl, thunderbird-locale-fa, thunderbird-locale-cy, thunderbird-locale-es-es, thunderbird-locale-hr, thunderbird-locale-pt-pt, thunderbird-locale-ast, thunderbird-locale-nl, thunderbird-locale-zh-cn, thunderbird-locale-de, thunderbird-locale-uk, thunderbird-locale-fy-nl, thunderbird-locale-ro, thunderbird-locale-fy, thunderbird-locale-sv-se, thunderbird-locale-es, thunderbird-locale-hsb, thunderbird-locale-mk, thunderbird-locale-hu, thunderbird-locale-hy, thunderbird-locale-cs, thunderbird-locale-ta-lk, thunderbird-locale-fr, thunderbird-locale-eu, thunderbird-locale-da, thunderbird-locale-ta, xul-ext-calendar-timezones, thunderbird-locale-br, thunderbird-locale-ka, thunderbird-locale-gd, thunderbird-locale-zh-hant, thunderbird-locale-ga-ie, thunderbird-locale-nb, thunderbird-locale-uz, thunderbird-locale-es-ar, thunderbird-locale-id, thunderbird-locale-bn-bd, thunderbird-locale-sv, thunderbird-locale-ru, thunderbird-locale-el, thunderbird-locale-sk, thunderbird-locale-lt, thunderbird-locale-zh-tw, thunderbird-locale-cak, thunderbird-locale-sq, thunderbird-locale-fi, thunderbird-locale-he, thunderbird-locale-be, thunderbird-locale-nn-no, thunderbird-locale-gl, thunderbird-mozsymbols, thunderbird-locale-ga, thunderbird-locale-ms, thunderbird-locale-en-gb, thunderbird-locale-pa, thunderbird-locale-pl, thunderbird-locale-nb-no, thunderbird-locale-en, thunderbird-locale-ko, thunderbird-locale-vi, thunderbird-locale-tr, thunderbird-locale-ja, thunderbird-locale-bg, thunderbird-locale-nn, xul-ext-gdata-provider, thunderbird-locale-pa-in, xul-ext-lightning, thunderbird-locale-sr, thunderbird-locale-zh-hans, thunderbird-locale-rm, thunderbird-locale-si, thunderbird-locale-ca, thunderbird-locale-en-us, thunderbird-locale-pt, thunderbird-locale-bn, thunderbird-locale-pt-br, thunderbird-locale-et, thunderbird-dev
  • USN-4978-1: firefox-locale-gd, firefox-locale-ro, firefox-locale-uz, firefox-locale-az, firefox-locale-af, firefox-locale-sr, firefox-locale-de, firefox-locale-ca, firefox-mozsymbols, firefox-locale-ko, firefox-locale-mr, firefox-locale-et, firefox-locale-as, firefox-locale-te, firefox-locale-mai, firefox-locale-ne, firefox-locale-ku, firefox-locale-km, firefox-locale-ml, firefox-locale-xh, firefox-locale-kn, firefox-locale-ia, firefox-locale-or, firefox-locale-zh-hant, firefox-locale-sl, firefox-locale-an, firefox-locale-fi, firefox-locale-lv, firefox-locale-nn, firefox-locale-lt, firefox-locale-vi, firefox-locale-id, firefox-locale-ga, firefox-locale-ka, firefox-locale-pa, firefox-locale-hy, firefox-locale-gl, firefox-locale-nso, firefox-locale-fy, firefox-locale-be, firefox-locale-csb, firefox-locale-he, firefox-locale-bg, firefox-locale-hu, firefox-locale-nb, firefox-locale-es, firefox-locale-uk, firefox-locale-da, firefox-locale-th, firefox-locale-pl, firefox-locale-ar, firefox-locale-el, firefox-locale-br, firefox-locale-mn, firefox-locale-cak, firefox-locale-si, firefox-locale-szl, firefox-locale-eo, firefox-locale-cy, firefox-locale-en, firefox-locale-eu, firefox-locale-zh-hans, firefox-locale-cs, firefox-locale-sk, firefox-locale-bs, firefox-locale-it, firefox-locale-is, firefox-locale-hr, firefox-locale-fa, firefox-locale-sw, firefox-locale-hsb, firefox-locale-sq, firefox-locale-my, firefox-locale-hi, firefox-locale-zu, firefox-locale-kk, firefox-locale-ms, firefox-locale-nl, firefox-locale-oc, firefox-locale-kab, firefox-locale-ta, firefox-locale-mk, firefox-locale-tr, firefox-locale-lg, firefox-geckodriver, firefox-locale-gu, firefox-locale-sv, firefox-locale-fr, firefox-locale-ru, firefox-locale-ja, firefox-locale-pt, firefox-locale-ast, firefox-locale-bn, firefox-locale-ur, firefox-locale-gn, firefox-dev, firefox
  • USN-4893-1: firefox-locale-gd, firefox-locale-ro, firefox-locale-uz, firefox-locale-az, firefox-locale-af, firefox-locale-sr, firefox-locale-de, firefox-locale-ca, firefox-mozsymbols, firefox-locale-ko, firefox-locale-mr, firefox-locale-et, firefox-locale-as, firefox-locale-te, firefox-locale-mai, firefox-locale-ne, firefox-locale-ku, firefox-locale-km, firefox-locale-ml, firefox-locale-xh, firefox-locale-kn, firefox-locale-ia, firefox-locale-or, firefox-locale-zh-hant, firefox-locale-sl, firefox-locale-an, firefox-locale-fi, firefox-locale-lv, firefox-locale-nn, firefox-locale-lt, firefox-locale-vi, firefox-locale-id, firefox-locale-ga, firefox-locale-ka, firefox-locale-pa, firefox-locale-hy, firefox-locale-gl, firefox-locale-nso, firefox-locale-fy, firefox-locale-be, firefox-locale-csb, firefox-locale-he, firefox-locale-bg, firefox-locale-hu, firefox-locale-nb, firefox-locale-es, firefox-locale-uk, firefox-locale-da, firefox-locale-th, firefox-locale-pl, firefox-locale-ar, firefox-locale-el, firefox-locale-br, firefox-locale-mn, firefox-locale-cak, firefox-locale-si, firefox-locale-szl, firefox-locale-eo, firefox-locale-cy, firefox-locale-en, firefox-locale-eu, firefox-locale-zh-hans, firefox-locale-cs, firefox-locale-sk, firefox-locale-bs, firefox-locale-it, firefox-locale-is, firefox-locale-hr, firefox-locale-fa, firefox-locale-sw, firefox-locale-hsb, firefox-locale-sq, firefox-locale-my, firefox-locale-hi, firefox-locale-zu, firefox-locale-kk, firefox-locale-ms, firefox-locale-nl, firefox-locale-oc, firefox-locale-kab, firefox-locale-ta, firefox-locale-mk, firefox-locale-tr, firefox-locale-lg, firefox-geckodriver, firefox-locale-gu, firefox-locale-sv, firefox-locale-fr, firefox-locale-ru, firefox-locale-ja, firefox-locale-pt, firefox-locale-ast, firefox-locale-bn, firefox-locale-ur, firefox-locale-gn, firefox-dev, firefox