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OpenAdvisories
Medium USN-4202-1 9 CVEs

thunderbird vulnerabilities

Published Nov 26, 2019 · Updated Apr 27, 2026

Ecosystem: Ubuntu

Summary

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)

Fixed packages 1

ReleasePackageFixed in
Ubuntu · 18.04 LTS 18.04:LTS thunderbird 1:68.2.1+build1-0ubuntu0.18.04.1

Vulnerabilities 9

References

  • report
    https://ubuntu.com/security/CVE-2019-11755
  • report
    https://ubuntu.com/security/CVE-2019-11757
  • report
    https://ubuntu.com/security/CVE-2019-11758
  • report
    https://ubuntu.com/security/CVE-2019-11759
  • report
    https://ubuntu.com/security/CVE-2019-11760
  • report
    https://ubuntu.com/security/CVE-2019-11761
  • report
    https://ubuntu.com/security/CVE-2019-11762
  • report
    https://ubuntu.com/security/CVE-2019-11763
  • report
    https://ubuntu.com/security/CVE-2019-11764
  • report
    https://ubuntu.com/security/CVE-2019-15903