CVE-2018-20743

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-01-25 · updated 2026-06-17
Weakness: CWE-20

Description

murmur in Mumble through 1.2.19 before 2018-08-31 mishandles multiple concurrent requests that are persisted in the database, which allows remote attackers to cause a denial of service (daemon hang or crash) via a message flood.

Affected products

Debian Linux: 8.0, 9.0
Mumble: through 1.2.19

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00045.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00058.html
https://bugs.debian.org/919249
https://github.com/mumble-voip/mumble/issues/3505
https://github.com/mumble-voip/mumble/pull/3510
https://github.com/mumble-voip/mumble/pull/3512
https://lists.debian.org/debian-lts-announce/2019/02/msg00006.html
https://www.debian.org/security/2019/dsa-4402
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00045.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00058.html

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