CVE-2021-37845
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).
Does this matter?
Lower severity and a low EPSS score (0.66%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 3.7 LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.66% probability · 50th percentile
- CISA KEV
- Not listed
- Affected
- citadel/webcit
- Source
- cve@mitre.org
References
- http://uncensored.citadel.org/dotgoto?room=Citadel%20SecurityIssue Tracking
- https://nostarttls.secvuln.info/Broken Link
- https://uncensored.citadel.org/msg/2099264259Exploit
- http://uncensored.citadel.org/dotgoto?room=Citadel%20SecurityIssue Tracking
- https://nostarttls.secvuln.info/Broken Link
- https://uncensored.citadel.org/msg/2099264259Exploit
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.