https://bugs.kde.org/show_bug.cgi?id=353317
Bug ID: 353317
Summary: kMail 5.0: Wrong signature issuer shown for OpenPGP
signed mails (SMIME not tested).
Product: kmail2
Version: unspecified
Platform: Kubuntu Packages
OS: Linux
Status: UNCONFIRMED
Severity: major
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Not sure if there might even be security implications:
A friend of mine sends signed messages which are always
* shown as having a valid signature (green display and everything)
* but from a completely wrong sender (!)
******************************************************************
Die Nachricht enthält die Signatur von [email protected] (Schlüsselkennung:
0x9F8E2A98D1A4EDE5).
Die Signatur ist gültig, und der Schlüssel ist vertrauenswürdig.
******************************************************************
(translation: The message contains the signature of [email protected] (Key-ID:
0x9F8E2A98D1A4EDE5).
The signature is valid and the key is trusted.
******************************************************************
I have this public key in my keyring, but it has nothing to do with the mail
that is displayed - if I extract its PGP signature into a separate file and use
gpg to display information about it, the following is displayed:
******************************************************************
$ LANG= gpg --verify sigfile /dev/null
gpg: Signature made Tue Sep 29 11:11:08 2015 CEST using RSA key ID 22B2951D
gpg: WARNING: digest algorithm MD5 is deprecated
gpg: please see https://gnupg.org/faq/weak-digest-algos.html for more
information
gpg: BAD signature from "Matthias XXXXXXX <[email protected]>"
******************************************************************
Neither mail address nor key ID have anything to do with the wrong key that is
picked up for display by kMail...
I'm also not sure why the wrong key is displayed as "trusted" in the first
place - it does not seem to be considered trusted by gpg:
******************************************************************
gpg: using classic trust model
pub 2048R/D1A4EDE5 created: 2000-02-26 expires: never usage: SCE
trust: undefined validity: unknown
******************************************************************
Reproducible: Always
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