Buffer overflow in Cyrus IMAP Server - CVE-2019-11356

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Main Vulnerability Database Vulnerabilities #VU18717

Buffer overflow in Cyrus IMAP Server - CVE-2019-11356

Published: June 9, 2019


Vulnerability identifier: #VU18717
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-11356
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in a crafted HTTP PUT operation for an event with a long iCalendar property name. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Cyrus IMAP Server
cyrus-imapd (Debian package)
cyrus-admin (Ubuntu package)
cyrus-caldav (Ubuntu package)
cyrus-common (Ubuntu package)
cyrus-imapd (Ubuntu package)
cyrus-replication (Ubuntu package)
cyrus-imapd
Red Hat Enterprise Linux for x86_64
Ubuntu
Fedora

How to mitigate CVE-2019-11356

Install update from vendor's website.

Cyrus IMAP Server - addressed in versions 2.5.13, 3.0.10
cyrus-imapd (Debian package) - update to 2.5.10-3+deb9u1
cyrus-admin (Ubuntu package) - update to 2.5.10-3ubuntu1.1
cyrus-caldav (Ubuntu package) - update to 2.5.10-3ubuntu1.1
cyrus-common (Ubuntu package) - update to 2.5.10-3ubuntu1.1
cyrus-imapd (Ubuntu package) - update to 2.5.10-3ubuntu1.1
cyrus-replication (Ubuntu package) - update to 2.5.10-3ubuntu1.1
cyrus-imapd - addressed in versions 3.0.10-1.fc29, 3.0.10-1.fc30

External References

Related Security Bulletins