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CVE-2017-17847

Date: December 22, 2017

An issue was discovered in Enigmail before 1.9.9. Signature spoofing is possible because the UI does not properly distinguish between an attachment signature, and a signature that applies to the entire containing message, aka TBE-01-021. This is demonstrated by an e-mail message with an attachment that is a signed e-mail message in message/rfc822 format.

Severity Score

Related Resources (10)

https://enigmail.net/download/other/Enigmail%20Pentest%20Report%20by%20Cure53%20-%20Excerpt.pdf
https://lists.debian.org/debian-lts-announce/2017/12/msg00021.html
https://www.mail-archive.com/enigmail-users%40enigmail.net/msg04280.html
https://sourceforge.net/p/enigmail/bugs/709/
https://security-tracker.debian.org/tracker/CVE-2017-17847
https://nvd.nist.gov/vuln/detail/CVE-2017-17847
https://www.debian.org/security/2017/dsa-4070
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-17847
https://lists.debian.org/debian-security-announce/2017/msg00333.html
https://www.mend.io/vulnerability-database/CVE-2017-17847

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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