Vulnerability in Mozilla Thunderbird
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.011 (63.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking, Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-32/ (Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html (vendor-advisory)
- seclists.org/bugtraq/2019/Nov/24 (mailing-list)
- www.debian.org/security/2019/dsa-4571 (vendor-advisory)
- lists.debian.org/debian-lts-announce/2019/11/msg00017.html (mailing-list)
- usn.ubuntu.com/4202-1/ (vendor-advisory)
- usn.ubuntu.com/4335-1/ (vendor-advisory)
Frequently asked questions
- What is CVE-2019-11755?
- CVE-2019-11755 is a high-severity vulnerability in Mozilla Thunderbird, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2019-09-27.
- How severe is CVE-2019-11755?
- High severity. CVSS v3 base score is 7.5 out of 10.