Important: cyrus-imapd

Issue Overview:

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. (CVE-2021-33582)

Affected Packages:

cyrus-imapd

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update cyrus-imapd to update your system.

New Packages:

aarch64:  
    cyrus-imapd-2.4.22-1.amzn2.0.1.aarch64  
    cyrus-imapd-devel-2.4.22-1.amzn2.0.1.aarch64  
    cyrus-imapd-utils-2.4.22-1.amzn2.0.1.aarch64  
    cyrus-imapd-debuginfo-2.4.22-1.amzn2.0.1.aarch64  
  
i686:  
    cyrus-imapd-2.4.22-1.amzn2.0.1.i686  
    cyrus-imapd-devel-2.4.22-1.amzn2.0.1.i686  
    cyrus-imapd-utils-2.4.22-1.amzn2.0.1.i686  
    cyrus-imapd-debuginfo-2.4.22-1.amzn2.0.1.i686  
  
src:  
    cyrus-imapd-2.4.22-1.amzn2.0.1.src  
  
x86_64:  
    cyrus-imapd-2.4.22-1.amzn2.0.1.x86_64  
    cyrus-imapd-devel-2.4.22-1.amzn2.0.1.x86_64  
    cyrus-imapd-utils-2.4.22-1.amzn2.0.1.x86_64  
    cyrus-imapd-debuginfo-2.4.22-1.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2021-33582

Mitre: CVE-2021-33582