PatchTheCVECVE-2017-17844: An issue was discovered in Enigmail before 1.9.9
CVE-2017-17844 is a medium-severity flaw (CVSS 6.5) affecting enigmail, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 1.4% (top 28%) |
| CISA exploited list | No |
| Weakness | CWE-319 |
| Published | 2017-12-27 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2017-17844?
enigmail: upgrade to 1.9.9; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2017-17844 being exploited?
CVE-2017-17844 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2017-17844 affect?
CVE-2017-17844 affects enigmail, debian linux. Severity is medium (CVSS 6.5). 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
How urgent is CVE-2017-17844?
Priority 46/100. On your watchlist
Software pages
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