CVE-2018-12291

The on_get_missing_events function in handlers/federation.py in Matrix Synapse before 0.31.1 has a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 43%
VendorProductVersion
matrixsynapse
𝑥
< 0.31.1
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
noble
needs-triage
mantic
ignored
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
ignored
hirsute
ignored
groovy
ignored
focal
not-affected
eoan
ignored
disco
ignored
cosmic
ignored
bionic
Fixed 0.24.0+dfsg-1ubuntu0.1~esm1
released
artful
ignored
xenial
dne
trusty
dne
References
https://github.com/matrix-org/synapse/pull/3371
https://github.com/matrix-org/synapse/releases/tag/v0.31.1
https://github.com/matrix-org/synapse/pull/3371
https://github.com/matrix-org/synapse/releases/tag/v0.31.1