CVE-2020-16128: Aptdaemon error messages disclosed file existence to unprivileged users via dbus properties

Severity: low (CVSS 3.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-09 · updated 2026-06-17
Weakness: CWE-209

Description

The aptdaemon DBus interface disclosed file existence disclosure by setting Terminal/DebconfSocket properties, aka GHSL-2020-192 and GHSL-2020-196. This affected versions prior to 1.1.1+bzr982-0ubuntu34.1, 1.1.1+bzr982-0ubuntu32.3, 1.1.1+bzr982-0ubuntu19.5, 1.1.1+bzr982-0ubuntu14.5.

Affected products

Canonical Ubuntu Linux: 16.04, 18.04, 20.04, 20.10

References

https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/1899513
https://usn.ubuntu.com/usn/usn-4664-1
https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/1899513
https://usn.ubuntu.com/usn/usn-4664-1

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