Medium: dovecot

Issue Overview:

In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components. (CVE-2019-7524)

It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users. (CVE-2019-3814)

Affected Packages:

dovecot

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 dovecot to update your system.

New Packages:

aarch64:  
    dovecot-2.2.36-6.amzn2.aarch64  
    dovecot-pigeonhole-2.2.36-6.amzn2.aarch64  
    dovecot-pgsql-2.2.36-6.amzn2.aarch64  
    dovecot-mysql-2.2.36-6.amzn2.aarch64  
    dovecot-devel-2.2.36-6.amzn2.aarch64  
    dovecot-debuginfo-2.2.36-6.amzn2.aarch64  
  
i686:  
    dovecot-2.2.36-6.amzn2.i686  
    dovecot-pigeonhole-2.2.36-6.amzn2.i686  
    dovecot-pgsql-2.2.36-6.amzn2.i686  
    dovecot-mysql-2.2.36-6.amzn2.i686  
    dovecot-devel-2.2.36-6.amzn2.i686  
    dovecot-debuginfo-2.2.36-6.amzn2.i686  
  
src:  
    dovecot-2.2.36-6.amzn2.src  
  
x86_64:  
    dovecot-2.2.36-6.amzn2.x86_64  
    dovecot-pigeonhole-2.2.36-6.amzn2.x86_64  
    dovecot-pgsql-2.2.36-6.amzn2.x86_64  
    dovecot-mysql-2.2.36-6.amzn2.x86_64  
    dovecot-devel-2.2.36-6.amzn2.x86_64  
    dovecot-debuginfo-2.2.36-6.amzn2.x86_64  

Additional References

Red Hat: CVE-2019-3814, CVE-2019-7524

Mitre: CVE-2019-3814, CVE-2019-7524