Buffer overflow in Cyrus IMAP server

Published: 2019-06-09 | Updated: 2019-06-09
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-11356
CWE ID CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software Cyrus IMAP Server Subscribe
Vendor Carnegie Mellon University

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

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cyrus IMAP Server: 2.5.0, 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.5.5, 2.5.6, 2.5.7, 2.5.8, 2.5.9, 2.5.10, 2.5.11, 2.5.12, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.0.8, 3.0.9

CPE External links

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IGO43JS7IFDNITHXOOHOP6JHRKRDIYY6/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PICSZDC3UGEUZ27VXGGM6OFI67D3KKLZ/
https://www.cyrusimap.org/imap/download/release-notes/2.5/index.html
https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.13.html
https://www.cyrusimap.org/imap/download/release-notes/3.0/index.html
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.10.html
https://www.debian.org/security/2019/dsa-4458

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.