CVE catalog
CVE-2021-37845
UBUNTU-CVE-2021-37845
- Severity
- Unknown
- Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.66% · Oct 27, 2026
An issue was discovered in Citadel through webcit-932. A meddler-in-the-middle attacker can fixate their own session during the cleartext phase before a STARTTLS command (a violation of "The STARTTLS command is only valid in non-authenticated state." in RFC2595). This potentially allows an attacker to cause a victim's e-mail messages to be stored into an attacker's IMAP mailbox, but depends on details of the victim's client behavior.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | citadel | 16.04 | 9.01-1 | vulnerable |
| Ubuntu | citadel | 18.04 | 911-1 | vulnerable |
| Ubuntu | citadel | 18.04 | 917-2 | vulnerable |
| Ubuntu | citadel | 20.04 | 917-3 | vulnerable |
| Ubuntu | citadel | 20.04 | 917-4 | vulnerable |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed: