Zammad: S/MIME signature verification allows forged sender impersonation
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| zammad | zammad | affected |
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No data.
No data.
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| Zammad | Zammad |
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No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.124% probability within 30 days)
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ssvc
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| First Time appeared |
Zammad
Zammad zammad |
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| Vendors & Products |
Zammad
Zammad zammad |
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| Description | Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when Zammad checks the digital signature on an incoming S/MIME-signed email, it does not verify that the signing certificate is genuinely trusted, it only checks whether a certificate with a matching name is already stored in the system. An attacker can create their own certificate using the name of a real, previously trusted sender and use it to send a forged email. Zammad will display that email with the same "validly signed" indicator as a genuine message from the real sender, even though the attacker never had access to that sender's actual certificate or private key. This issue is fixed in version 7.1.2. | |
| Title | Zammad: S/MIME signature verification allows forged sender impersonation | |
| Weaknesses | CWE-290 CWE-295 CWE-347 |
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| References |
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| Metrics |
cvssV4_0
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