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CVE-2020-16128

Aptdaemon error messages disclosed file existence to unprivileged users via dbus properties

3.8 LowFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.34%Down 0.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 3.8

Aptdaemon error messages disclosed file existence to unprivileged users via dbus properties

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.

Record
CVE-2020-16128
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Weakness
CWE-209
Updated
2026-11-02
EUVDEUVD-2020-8094 3.8

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.

Record
EUVD-2020-8094
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-hpfw-6cc8-9hhj No score

The aptdaemon DBus interface disclosed file existence disclosure by setting Terminal...

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.

Record
GHSA-hpfw-6cc8-9hhj
Weakness
CWE-209
Updated
2026-11-02
NVD 3.8

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.

Record
CVE-2020-16128
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-209
Updated
2026-11-02
OSVUBUNTU-CVE-2020-16128 3.8

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.

Record
UBUNTU-CVE-2020-16128
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Updated
2026-11-02
OSVUSN-4664-1 No score

aptdaemon vulnerabilities

Kevin Backhouse discovered that Aptdaemon incorrectly handled certain properties. A local attacker could use this issue to test for the presence of local files. (CVE-2020-16128)

Kevin Backhouse discovered that Aptdaemon incorrectly handled permission checks. A local attacker could possibly use this issue to cause a denial of service. (CVE-2020-27349)

Record
USN-4664-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
aptdaemon
Ubuntu:16.04:LTS
 before 1.1.1+bzr982-0ubuntu14.5, plus listed versions
1.1.1+bzr982-0ubuntu141.1.1+bzr982-0ubuntu14.11.1.1+bzr982-0ubuntu14.21.1.1+bzr982-0ubuntu14.31.1.1+bzr982-0ubuntu14.4
1.1.1+bzr982-0ubuntu14.5
aptdaemon
Ubuntu:18.04:LTS
 before 1.1.1+bzr982-0ubuntu19.5, plus listed versions
1.1.1+bzr982-0ubuntu171.1.1+bzr982-0ubuntu191.1.1+bzr982-0ubuntu19.11.1.1+bzr982-0ubuntu19.21.1.1+bzr982-0ubuntu19.31.1.1+bzr982-0ubuntu19.4
1.1.1+bzr982-0ubuntu19.5
aptdaemon
Ubuntu:20.04:LTS
 before 1.1.1+bzr982-0ubuntu32.3, plus listed versions
1.1.1+bzr982-0ubuntu281.1.1+bzr982-0ubuntu301.1.1+bzr982-0ubuntu311.1.1+bzr982-0ubuntu321.1.1+bzr982-0ubuntu32.11.1.1+bzr982-0ubuntu32.2
1.1.1+bzr982-0ubuntu32.3
aptdaemon
Ubuntu:16.04:LTS
From an advisory covering 2 CVEs
 before 1.1.1+bzr982-0ubuntu14.5, plus listed versions
1.1.1+bzr982-0ubuntu141.1.1+bzr982-0ubuntu14.11.1.1+bzr982-0ubuntu14.21.1.1+bzr982-0ubuntu14.31.1.1+bzr982-0ubuntu14.4
1.1.1+bzr982-0ubuntu14.5
aptdaemon
Ubuntu:18.04:LTS
From an advisory covering 2 CVEs
 before 1.1.1+bzr982-0ubuntu19.5, plus listed versions
1.1.1+bzr982-0ubuntu171.1.1+bzr982-0ubuntu191.1.1+bzr982-0ubuntu19.11.1.1+bzr982-0ubuntu19.21.1.1+bzr982-0ubuntu19.31.1.1+bzr982-0ubuntu19.4
1.1.1+bzr982-0ubuntu19.5
aptdaemon
Ubuntu:20.04:LTS
From an advisory covering 2 CVEs
 before 1.1.1+bzr982-0ubuntu32.3, plus listed versions
1.1.1+bzr982-0ubuntu281.1.1+bzr982-0ubuntu301.1.1+bzr982-0ubuntu311.1.1+bzr982-0ubuntu321.1.1+bzr982-0ubuntu32.11.1.1+bzr982-0ubuntu32.2
1.1.1+bzr982-0ubuntu32.3

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-16128 is a low vulnerability (CVSS 3.8) in Canonical Aptdaemon, published December 8, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.34%, the 27th percentile. Fixed in aptdaemon 1.1.1+bzr982-0ubuntu14.5.

References

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