CVE-2019-11779

Description

In Eclipse Mosquitto 1.5.0 to 1.6.5 inclusive, if a malicious MQTT client sends a SUBSCRIBE packet containing a topic that consists of approximately 65400 or more '/' characters, i.e. the topic hierarchy separator, then a stack overflow will occur.

Categories

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 7.12% Top 10%
Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory eclipse.org
Affected: The Eclipse Foundation Eclipse Mosquitto
Published at:
Updated at:

References

Link Tags
https://bugs.eclipse.org/bugs/show_bug.cgi?id=551160 vendor advisory
https://usn.ubuntu.com/4137-1/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00077.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00008.html mailing list third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HFWQBNFTAVHPUYNGYO2TCPF5PCSWC2Z7/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWNVTFA2CKXERXRYPYE2YFTZP4GNBGYY/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D4WMHIM64Q35NGTR6R3ILZUL4MA4ANB5/ vendor advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00035.html third party advisory mailing list
https://www.debian.org/security/2019/dsa-4570 third party advisory vendor advisory
https://seclists.org/bugtraq/2019/Nov/25 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2019-11779?
CVE-2019-11779 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11779?
To fix CVE-2019-11779, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11779 being actively exploited in the wild?
It is possible that CVE-2019-11779 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-11779?
CVE-2019-11779 affects The Eclipse Foundation Eclipse Mosquitto.
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