CVE-2021-37845

Public Exploit

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.

3.7

CVSS

Severity: Low

CVSS 3.1 •

EPSS 0.09%

Affected: n/a n/a

References

Link	Tags
http://uncensored.citadel.org/dotgoto?room=Citadel%20Security	issue tracking
https://uncensored.citadel.org/msg/2099264259	exploit
https://nostarttls.secvuln.info/	broken link

Frequently Asked Questions

What is the severity of CVE-2021-37845?: CVE-2021-37845 has been scored as a low severity vulnerability.
How to fix CVE-2021-37845?: To fix CVE-2021-37845, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-37845 being actively exploited in the wild?: It is possible that CVE-2021-37845 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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