Hi all,
we are releasing a CVE patch release 2.3.21.1.
https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot
Kind regards, Aki Tuomi Open-Xchange oy
- CVE-2024-23184: A large number of address headers in email resulted in excessive CPU usage.
- CVE-2024-23185: Abnormally large email headers are now truncated or discarded, with a limit of 10MB on a single header and 50MB for all the headers of all the parts of an email.
- oauth2: Dovecot would send client_id and client_secret as POST parameters to introspection server. These need to be optionally in Basic auth instead as required by OIDC specification.
- oauth2: JWT key type check was too strict.
- oauth2: JWT token audience was not validated against client_id as required by OIDC specification.
- oauth2: XOAUTH2 and OAUTHBEARER mechanisms were not giving out protocol specific error message on all errors. This broke OIDC discovery.
- oauth2: JWT aud validation was not performed if aud was missing from token, but was configured on Dovecot.
we are releasing a CVE patch release 2.3.21.1.
https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot
I know about these issues with openssl 3 and if I remember correctly this is solved in 2.4. But when do you expect packages for el9 to be available?
On 14/08/2024 15:07 EEST Marc via dovecot <dovecot@dovecot.org> wrote:
we are releasing a CVE patch release 2.3.21.1.
https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot
I know about these issues with openssl 3 and if I remember correctly this is solved in 2.4. But when do you expect packages for el9 to be available?
Hi!
EL9 packages will be provided from 2.4 forward.
Aki
On 15/08/24 00:07, Marc via dovecot via dovecot wrote:
we are releasing a CVE patch release 2.3.21.1.
https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot
I know about these issues with openssl 3 and if I remember correctly this is solved in 2.4. But when do you expect packages for el9 to be available?
El9 packages are in GhettoForge: http://ghettoforge.org/
2.3.21.1 is being built now and will hopefully be released in a couple of hours.
Peter
Hi Aki,
we are releasing a CVE patch release 2.3.21.1.
Your message to the oss-security list [0] says both 2.2 and 2.3 versions are vulnerable to CVE-2024-23184. Using the following test message as reproducer
From: foo@example.net
To: bar1@example.net
, bar2@example.net
[…]
, bar$n@example.net
Bcc: baz1@example.net
[…]
Bcc: baz$n@example.net
Date: $(LC_TIME=C.UTF-8 date -R)
Subject: boom
Message-Id: $(cat /proc/sys/kernel/random/uuid)@example.net
boomI could reproduce the issue back to 2.3.10 but not with earlier
versions. I used doveadm fetch imap.envelope all to measure the
(non-cached) IMAP ENVELOPE command.
For n=100k, it takes ~20s with 2.3.19 vs. ~0.5s with early 2.3.x and 2.2.x. For n=500k, I measured ~2s with early 2.3.x and 2.2.x, so for these versions it doesn't look like parsing is O(n²) in the number of addresses.
I didn't try to bisect to pinpoint the exact commit, but AFAICT the main problem you described
| each header line's address is added to the end of a linked list. This | is done by walking the whole linked list, which becomes more inefficient | the more addresses there are.
was introduced in 2.3.10 by https://github.com/dovecot/core/commit/469fcd3bdd7df40bb8f4d131121f3bfbceade... .
Is my reproducer/analysis incorrect, or are versions before 2.3.10 immune to CVE-2024-23184? (AFAICT they are affected by CVE-2024-23185; only talking about -23184 here.)
Thanks,
Guilhem.
On 2. Sep 2024, at 15.44, Guilhem Moulin via dovecot <dovecot@dovecot.org> wrote:
Hi Aki,
we are releasing a CVE patch release 2.3.21.1.
Your message to the oss-security list [0] says both 2.2 and 2.3 versions are vulnerable to CVE-2024-23184. Using the following test message as reproducer
From: foo@example.net To: bar1@example.net , bar2@example.net […] , bar$n@example.net Bcc: baz1@example.net […] Bcc: baz$n@example.net Date: $(LC_TIME=C.UTF-8 date -R) Subject: boom Message-Id: $(cat /proc/sys/kernel/random/uuid)@example.net
boom
I could reproduce the issue back to 2.3.10 but not with earlier versions. I used
doveadm fetch imap.envelope allto measure the (non-cached) IMAP ENVELOPE command.For n=100k, it takes ~20s with 2.3.19 vs. ~0.5s with early 2.3.x and 2.2.x. For n=500k, I measured ~2s with early 2.3.x and 2.2.x, so for these versions it doesn't look like parsing is O(n²) in the number of addresses.
I didn't try to bisect to pinpoint the exact commit, but AFAICT the main problem you described
| each header line's address is added to the end of a linked list. This | is done by walking the whole linked list, which becomes more inefficient | the more addresses there are.
was introduced in 2.3.10 by https://github.com/dovecot/core/commit/469fcd3bdd7df40bb8f4d131121f3bfbceade... .
Is my reproducer/analysis incorrect, or are versions before 2.3.10 immune to CVE-2024-23184? (AFAICT they are affected by CVE-2024-23185; only talking about -23184 here.)
Yes, looks like this is all correct. I guess we didn't really verify the oldest version this affects.
On 14/08/24 23:25, Aki Tuomi via dovecot wrote:
Hi all,
we are releasing a CVE patch release 2.3.21.1.
https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot
Tests failing when attempting to build for both EL8 and 9:
test-failures.c:152: Assert failed: internal_line_match(line, long_log_prefix, TEXT128) test-failures.c:152: Assert failed: internal_line_match(line, long_log_prefix, TEXT128) test-failures.c:152: Assert failed: internal_line_match(line, long_log_prefix, TEXT128)
...this test did not fail in 2.3.21
Peter
On 14/08/24 23:25, Aki Tuomi via dovecot wrote:
Hi all,
we are releasing a CVE patch release 2.3.21.1.
https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot
Tests failing when attempting to build for both EL8 and 9:
When is 2.4 for el9 expected?
On 7/09/24 00:55, Marc via dovecot wrote:
On 14/08/24 23:25, Aki Tuomi via dovecot wrote:
Hi all,
we are releasing a CVE patch release 2.3.21.1.
https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.21.1.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot
Tests failing when attempting to build for both EL8 and 9:
When is 2.4 for el9 expected?
GhettoForge will release it after the general availablility of 2.4. Others from Dovecot have stated that it will be available directly from the dovecot ce repos once 2.4 is released.
Peter
Tests failing when attempting to build for both EL8 and 9:
When is 2.4 for el9 expected?
GhettoForge will release it after the general availablility of 2.4. Others from Dovecot have stated that it will be available directly from the dovecot ce repos once 2.4 is released.
But there is nothing like a date known yet?
participants (5)
-
Aki Tuomi
-
Guilhem Moulin
-
Marc
-
Peter
-
Timo Sirainen