CVE-2019-11755

A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted message. Previous versions had only suppressed showing a digital signature for messages with an outer multipart/signed layer. This vulnerability affects Thunderbird < 68.1.1.

• How can I get the fixes?
• What do statuses mean?

References

• MITRE
• NVD
• Launchpad
• Debian

Related Ubuntu Security Notices (USN)

• USN-4202-1
• Thunderbird vulnerabilities
• 26 November 2019
• USN-4335-1
• Thunderbird vulnerabilities
• 21 April 2020

Other references

• https://www.mozilla.org/en-US/security/advisories/mfsa2019-32/#CVE-2019-11755
• https://bugzilla.mozilla.org/show_bug.cgi?id=1240290
• https://www.mozilla.org/security/advisories/mfsa2019-32/
• https://www.cve.org/CVERecord?id=CVE-2019-11755