Bug 1993232 (CVE-2021-33582) - CVE-2021-33582 cyrus-imapd: Denial of service via string hashing algorithm collisions
Summary: CVE-2021-33582 cyrus-imapd: Denial of service via string hashing algorithm co...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-33582
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1994029 1994030 1994032 1994033 1994034 2000080 2002979
Blocks: 1993234
TreeView+ depends on / blocked
 
Reported: 2021-08-12 15:15 UTC by Pedro Sampaio
Modified: 2022-05-17 09:58 UTC (History)
10 users (show)

Fixed In Version: cyrus-imapd 3.0.16, cyrus-imapd 3.2.8, cyrus-imapd 3.4.2
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in cyrus-imapd. A bad string hashing algorithm used in internal hash tables allows user inputs to be stored in predictable buckets. A user may cause a CPU denial of service by maliciously directing many inputs to a single bucket. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed: 2021-09-13 12:21:10 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:3492 0 None None None 2021-09-13 07:50:42 UTC
Red Hat Product Errata RHSA-2021:3493 0 None None None 2021-09-13 07:36:51 UTC
Red Hat Product Errata RHSA-2021:3546 0 None None None 2021-09-15 07:44:33 UTC

Description Pedro Sampaio 2021-08-12 15:15:23 UTC 
A flaw was found in cyrus-imapd 2.4, 2.5, 3.0, 3.2 and 3.4. A bad string hashing algorithm used in internal hash tables allows user inputs to be stored in predictable buckets.  A user may cause a CPU DOS by maliciously directing many inputs to a single bucket.
Comment 8 Marian Rehak 2021-09-01 10:47:38 UTC 
Created cyrus-imapd tracking bugs for this issue:

Affects: fedora-all [bug 2000080]
Comment 9 Tomas Hoger 2021-09-02 19:55:48 UTC 
References:

https://cyrus.topicbox.com/groups/announce/T3dde0a2352462975-M1386fc44adf967e072f8df13/cyrus-imap-3-4-2-3-2-8-and-3-0-16-released
https://www.cyrusimap.org/imap/download/release-notes/3.4/x/3.4.2.html
https://www.cyrusimap.org/imap/download/release-notes/3.2/x/3.2.8.html
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.16.html
Comment 10 errata-xmlrpc 2021-09-13 07:36:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:3493 https://access.redhat.com/errata/RHSA-2021:3493
Comment 11 errata-xmlrpc 2021-09-13 07:50:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:3492 https://access.redhat.com/errata/RHSA-2021:3492
Comment 12 Product Security DevOps Team 2021-09-13 12:21:10 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-33582
Comment 13 errata-xmlrpc 2021-09-15 07:44:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:3546 https://access.redhat.com/errata/RHSA-2021:3546
Note You need to log in before you can comment on or make changes to this bug.