CVE-2018-18509 - Improper Verification of Cryptographic Signature

Severity

50%

Complexity

99%

Confidentiality

48%

CVSS 3.0 Base Score 5.3. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N).

Demo Examples

Improper Verification of Cryptographic Signature

CWE-347

In the following code, a JarFile object is created from a downloaded file.


               
JarFile jf = new JarFile(f);

The JAR file that was potentially downloaded from an untrusted source is created without verifying the signature (if present). An alternate constructor that accepts a boolean verify parameter should be used instead.

Overview

First reported 5 years ago

2019-04-26 17:29:00

Last updated 5 years ago

2019-06-03 19:29:00

Affected Software

Mozilla Thunderbird

References

openSUSE-SU-2019:1162

http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html

Third Party Advisory, VDB Entry

20190430 OpenPGP and S/MIME signature forgery attacks in multiple email clients

Mailing List, Third Party Advisory

[oss-security] 20190430 Spoofing OpenPGP and S/MIME Signatures in Emails (multiple clients)

Mailing List, Third Party Advisory

RHSA-2019:1144

https://bugzilla.mozilla.org/show_bug.cgi?id=1507218

Issue Tracking, Permissions Required, Vendor Advisory

https://github.com/RUB-NDS/Johnny-You-Are-Fired

https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf

https://www.mozilla.org/security/advisories/mfsa2019-06/

Vendor Advisory

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