CVE-2019-11755 — Improper Verification of Cryptographic Signature in Mozilla Thunderbird
Severity
7.5HIGHNVD
OSV8.8
EPSS
0.4%
top 38.90%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedSep 27
Latest updateMay 24
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitability: 3.9 | Impact: 3.6
Affected Packages5 packages
🔴Vulnerability Details
5GHSA▶
GHSA-42rq-cwg9-m583: 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↗2022-05-24
OSV▶
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↗2019-09-27
📋Vendor Advisories
5Debian▶
CVE-2019-11755: thunderbird - A crafted S/MIME message consisting of an inner encryption layer and an outer Si...↗2019