Moderate: cyrus-imapd security update

Synopsis

Moderate: cyrus-imapd security update

Type/Severity

Security Advisory: Moderate

Topic

An update for cyrus-imapd is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The cyrus-imapd packages contain a high-performance mail server with IMAP, POP3, NNTP, and SIEVE support.

Security Fix(es):

• cyrus-imapd: privilege escalation in HTTP request (CVE-2019-18928)
  
• cyrus-imapd: lmtpd component created mailboxes with administrator privileges if the "fileinto" was used, bypassing ACL checks (CVE-2019-19783)
  

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64

Fixes

• BZ - 1671239 - Changelog was removed, reverting the commit is required
• BZ - 1710722 - cyrus-imapd-key.pem has wrong permissions
• BZ - 1775177 - CVE-2019-18928 cyrus-imapd: privilege escalation in HTTP request
• BZ - 1786756 - CVE-2019-19783 cyrus-imapd: lmtpd component created mailboxes with administrator privileges if the "fileinto" was used, bypassing ACL checks

CVEs

• CVE-2019-18928
• CVE-2019-19783

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/