Vulnerability Monitor

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CVE-2017-17848

An issue was discovered in Enigmail before 1.9.9. In a variant of CVE-2017-17847, signature spoofing is possible for multipart/related messages because a signed message part can be referenced with a cid: URI but not actually displayed. In other words, the entire containing message appears to be signed, but the recipient does not see any of the signed text.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 2 products from enigmail, from debian organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-12-27T17:08:19.920

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-347

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	enigmail	enigmail	< 1.9.9	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes

References

http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html Third Party Advisory, VDB Entry ([email protected])
http://seclists.org/fulldisclosure/2019/Apr/38 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2019/04/30/4 Mailing List, Third Party Advisory ([email protected])
https://github.com/RUB-NDS/Johnny-You-Are-Fired ([email protected])
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf ([email protected])
https://lists.debian.org/debian-lts-announce/2017/12/msg00021.html Mailing List, Third Party Advisory ([email protected])
https://lists.debian.org/debian-security-announce/2017/msg00333.html Mailing List, Third Party Advisory ([email protected])
https://sourceforge.net/p/enigmail/bugs/709/ Third Party Advisory ([email protected])
https://www.debian.org/security/2017/dsa-4070 Third Party Advisory ([email protected])
http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2019/Apr/38 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2019/04/30/4 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/RUB-NDS/Johnny-You-Are-Fired (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2017/12/msg00021.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-security-announce/2017/msg00333.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://sourceforge.net/p/enigmail/bugs/709/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2017/dsa-4070 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For enigmail's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.