CVE-2021-32728

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if a private key belongs to previously downloaded public certificate. If the Nextcloud instance serves a malicious public key, the data would be encrypted for this key and thus could be accessible to a malicious actor. This issue is fixed in Nextcloud Desktop Client version 3.3.0. There are no known workarounds aside from upgrading.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
GitHub_MCNA
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVEADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 62%
VendorProductVersion
nextclouddesktop
𝑥
< 3.3.0
debiandebian_linux
10.0
debiandebian_linux
11.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
nextcloud-desktop
bullseye (security)
3.1.1-2+deb11u1
fixed
bullseye
3.1.1-2+deb11u1
fixed
bookworm
3.7.3-1+deb12u1
fixed
sid
3.13.2-2
fixed
trixie
3.13.2-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
nextcloud-desktop
noble
not-affected
mantic
not-affected
lunar
not-affected
kinetic
ignored
jammy
needs-triage
impish
ignored
hirsute
ignored
focal
needs-triage
bionic
dne
xenial
ignored
trusty
dne