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Fencer Vulns
high 7.5

CVE-2018-20743 json

murmur in Mumble through 1.2.19 before 2018-08-31 mishandles multiple concurrent requests that are persisted in the database, which allows…

published 2019-01-25 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13288

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

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.

Patch / fix

  • mumble Debian 14, Debian 13, Debian 12 1.3.0~git20190114.9fcc588+dfsg-1

debian advisories DEBIAN-CVE-2018-20743

  • mumble openSUSE Tumbleweed 1.3.4-2.7
  • mumble Package Hub 15 SP1 1.2.19-bp151.6.6.1
  • mumble Package Hub 15 SP1 1.2.19-bp151.6.3.1
  • mumble Package Hub 15, Package Hub 12, openSUSE Leap 15.1 +1 more 1.2.19-bp150.3.3.1

opensuse advisories openSUSE-SU-2024:11065-1openSUSE-SU-2020:0137-1openSUSE-SU-2019:1876-1openSUSE-SU-2019:1794-1

  • mumble Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 1.2.19-r9
  • mumble Alpine 3.6 1.2.19-r2
  • mumble Alpine 3.7 1.2.19-r5
  • mumble Alpine 3.8 1.2.19-r7

alpine advisories ALPINE-CVE-2018-20743

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-20743 updated cvss 7.5

mumble: instability and crash due to message flood

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.62% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.