Bug 1973610 (CVE-2021-33515) - CVE-2021-33515 dovecot: plaintext commands injection
Summary: CVE-2021-33515 dovecot: plaintext commands injection
Alias: CVE-2021-33515
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1974393 1979832 1980013 1980014
Blocks: 1973612
TreeView+ depends on / blocked
Reported: 2021-06-18 10:21 UTC by Marian Rehak
Modified: 2022-05-11 06:46 UTC (History)
6 users (show)

Fixed In Version: dovecot
Doc Type: If docs needed, set a value
Doc Text:
It was found that dovecot could still accept plaintext commands while the STARTTLS negotiation process is ongoing. This could allow an active person in the middle, with valid credentials on dovecot, to, for example, steal confidential data such as the client's emails and passwords.
Clone Of:
Last Closed: 2022-05-11 06:46:39 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:1950 0 None None None 2022-05-10 14:27:05 UTC

Description Marian Rehak 2021-06-18 10:21:22 UTC
On-path attacker could inject plaintext commands before STARTTLS negotiation that would be executed after STARTTLS finished with the client. Only the SMTP submission service is affected.

Reference : https://dovecot.org/pipermail/dovecot-news/2021-June/000462.html

Comment 1 Guilherme de Almeida Suckevicz 2021-06-21 14:49:08 UTC
Created dovecot tracking bugs for this issue:

Affects: fedora-all [bug 1974393]

Comment 6 errata-xmlrpc 2022-05-10 14:27:01 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1950 https://access.redhat.com/errata/RHSA-2022:1950

Comment 7 Product Security DevOps Team 2022-05-11 06:46:37 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


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