CVE-2019-18835

Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 38%
VendorProductVersion
matrixsynapse
𝑥
< 1.5.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
matrix-synapse
sid
1.116.0-3
fixed
trixie
1.116.0-3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
matrix-synapse
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
not-affected
groovy
not-affected
focal
not-affected
bionic
Fixed 0.24.0+dfsg-1ubuntu0.1~esm1
released
xenial
dne
trusty
dne
Common Weakness Enumeration
References
https://github.com/matrix-org/synapse/pull/6262
https://github.com/matrix-org/synapse/releases/tag/v1.5.0
https://github.com/matrix-org/synapse/pull/6262
https://github.com/matrix-org/synapse/releases/tag/v1.5.0