Cleartext transmission of sensitive information in Enigmail - CVE-2017-17844
Published: December 27, 2017 / Updated: July 17, 2020
Vulnerability identifier: #VU31376
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-17844
CWE-ID: CWE-319
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
An issue was discovered in Enigmail before 1.9.9. A remote attacker can obtain cleartext content by sending an encrypted data block (that the attacker cannot directly decrypt) to a victim, and relying on the victim to automatically decrypt that block and then send it back to the attacker as quoted text, aka the TBE-01-005 "replay" issue.
Affected software
Enigmail
How to mitigate CVE-2017-17844
Install update from vendor's website.
Enigmail - update to 1.9.9
External References
- 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://lists.debian.org/debian-security-announce/2017/msg00333.html
- https://www.debian.org/security/2017/dsa-4070
- https://www.mail-archive.com/enigmail-users@enigmail.net/msg04280.html