CVE-2018-18509

Advisory lineage Upstream: 0 Downstream: 14
Modified
Published: 26 Apr 2019, 16:13
Last modified:05 Aug 2024, 11:08

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
v3.0 (nvd)
EPSS Score
0.25% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Apr 2019, 16:13
Published
Vulnerability first disclosed
05 Aug 2024, 11:08
Last Modified
Vulnerability information updated

Description

A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird < 60.5.1.

CVSS Metrics

  • v3.0•MEDIUM•Score: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.25%• Percentile: 49%

Techniques & Countermeasures

  • CWE-347•Improper Verification of Cryptographic Signature

    The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Affected Systems

  • mozilla•thunderbird

    < 60.5.1 | ≥ unspecified, < 60.5.1

References (9)