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Gentoo: GLSA-202006-24 Normal: Postfix Security Issue Causes DoS Attack

gentoo
Calendar Grey June 15, 2020
Dist Gentoo Esm H88
Cyrus IMAP Server vulnerability enables mailbox creation under administrator rights; upgrade suggested. Check Gentoo's advisory for details.
An error in Cyrus IMAP Server allows mailboxes to be created with administrative privileges.

Summary

An issue was discovered in Cyrus IMAP Server where sieve script uploading is excessively trusted.

Topics%20covered

Topics Covered

security advisory gentoo email server normal severity access bypass administrative privilege cyrus imap

Resolution

All Cyrus IMAP Server users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/cyrus-imapd-3.0.13"

References

[ 1 ] CVE-2019-19783 https://nvd.nist.gov/vuln/detail/CVE-2019-19783

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202006-23
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: Cyrus IMAP Server: Access restriction bypass
Date: June 15, 2020
Bugs: #703630
ID: 202006-23

Topics%20covered

Topics Covered

security advisory gentoo email server normal severity access bypass administrative privilege cyrus imap

Synopsis

An error in Cyrus IMAP Server allows mailboxes to be created with administrative privileges.

Background

The Cyrus IMAP Server is an efficient, highly-scalable IMAP e-mail server.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-mail/cyrus-imapd < 3.0.13 >= 3.0.13

Impact

===== A user can use a sieve script to create any mailbox with administrator privileges.

Workaround

Disable sieve script uploading until the upgrade is complete.

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