CVE-2017-17844: Debian Linux

Medium severity, CVSS 6.5. EPSS: 1.4% chance of exploitation in the next 30 days.

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 products

• Debian Debian Linux: version 8.0 only; version 9.0 only
• Enigmail Enigmail: before 1.9.9 (fixed in 1.9.9)

Published 2017-12-27. Last modified 2026-06-17.