CVE-2021-37845
Last modified
CVE-2021-37845 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. 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). EPSS estimates a 0.66% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Citadel | Webcit | <= 932 |
References
- https://nostarttls.secvuln.info/Broken Link
- https://nostarttls.secvuln.info/Broken Link
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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