Vulnerability CVE-2017-17847

Vulnerability Name:

CVE-2017-17847 (CCN-136689)

Assigned:

2017-12-22

Published:

2017-12-22

Updated:

2018-02-04

Summary:

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.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): High Availibility (A): None

4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

Vulnerability Type:

CWE-347

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2017-17847

Source: MISC
Type: Vendor Advisory
https://enigmail.net/download/other/Enigmail%20Pentest%20Report%20by%20Cure53%20-%20Excerpt.pdf

Source: XF
Type: UNKNOWN
enigmail-cve201717847-spoofing(136689)

Source: MLIST
Type: UNKNOWN
[debian-lts-announce] 20171223 [SECURITY] [DLA 1219-1] enigmail security update

Source: MISC
Type: Third Party Advisory
https://lists.debian.org/debian-security-announce/2017/msg00333.html

Source: MISC
Type: Third Party Advisory
https://sourceforge.net/p/enigmail/bugs/709/

Source: CCN
Type: Debian Security Advisory: DSA-4070-1
enigmail -- security update

Source: DEBIAN
Type: Third Party Advisory
DSA-4070

Source: CCN
Type: Enigmail Web site
A simple interface for OpenPGP email security

Source: MISC
Type: Mailing List, Vendor Advisory
https://www.mail-archive.com/enigmail-users@enigmail.net/msg04280.html

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2017-17847

Vulnerable Configuration:

Configuration 1:

cpe:/a:enigmail:enigmail:*:*:*:*:*:*:*:* (Version < 1.9.9)

Configuration 2:

cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:enigmail:enigmail:1.9.8:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.artful:def:201717847000	V	CVE-2017-17847 on Ubuntu 17.10 (artful) - high.	2017-12-27
oval:com.ubuntu.trusty:def:201717847000	V	CVE-2017-17847 on Ubuntu 14.04 LTS (trusty) - high.	2017-12-27
oval:com.ubuntu.xenial:def:201717847000	V	CVE-2017-17847 on Ubuntu 16.04 LTS (xenial) - high.	2017-12-27
oval:com.ubuntu.xenial:def:2017178470000000	V	CVE-2017-17847 on Ubuntu 16.04 LTS (xenial) - high.	2017-12-27

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