Debian update for cyrus-imapd

Published: 2019-06-09 | Updated: 2019-06-09
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-11356
Exploitation vector Network
Public exploit N/A
Vulnerable software cyrus-imapd (Debian package) Subscribe
Vendor Debian

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Buffer overflow

Severity: Medium

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-11356

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer


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.


Update the affected package to version: 2.5.10-3+deb9u1.

Vulnerable software versions

cyrus-imapd (Debian package): 2.5.7-0+exp1, 2.5.7-0+exp2, 2.5.7-0+exp3, 2.5.7-0+exp4, 2.5.7-1, 2.5.8-1, 2.5.9-1, 2.5.9-2, 2.5.10-1, 2.5.10-2, 2.5.10-3

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.