CVE-2014-3477: The dbus-daemon in D-Bus 1.2.x through 1.4.x, 1.6.x before 1.6.20, and 1.8.x before 1.8.4, sends an AccessDeni

Routine

MEDIUM 4.0DOWNGRADEMITIGATE

CVE-2014-3477 is a medium-severity flaw (CVSS 4.0) affecting d-bus, dbus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The dbus-daemon in D-Bus 1.2.x through 1.4.x, 1.6.x before 1.6.20, and 1.8.x before 1.8.4, sends an AccessDenied error to the service instead of a client when the client is prohibited from accessing the service, which allows local users to cause a denial of service (initialization failure and exit) or possibly conduct a side-channel attack via a D-Bus message to an inactive service.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.0 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Published	2014-07-01
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: d-bus project · freedesktop

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-07-01 17:55 UTCPublished CVE record published
2026-06-17 00:08 UTCUpdated Record last modified

d-bus project d-bus DOWNGRADE

Affected: 1.2.4.2 · 1.2.4.4 · 1.2.4.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.4.2

1. Check installed version

apt-cache policy d-bus || rpm -q d-bus || d-bus --version

2. No fixed release: DOWNGRADE to a release before 1.2.4.2 (Debian / Ubuntu)

apt-cache madison d-bus sudo apt install d-bus=<VERSION_BEFORE_1.2.4.2> sudo apt-mark hold d-bus

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list d-bus sudo dnf downgrade d-bus-<VERSION_BEFORE_1.2.4.2> sudo dnf versionlock add d-bus

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

freedesktop dbus MITIGATE

Affected: 1.2.1 · 1.2.3 · 1.2.4 · 1.2.6 · 1.2.8 · 1.2.10 · 1.2.12 · 1.2.14

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dbus || rpm -q dbus || dbus --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Downgrade not recommended

This is a core system component: downgrading can break the OS. Apply the distro update or the vendor mitigation.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2014-3477?

d-bus: downgrade or apply the listed mitigation; dbus: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-3477 being exploited?

CVE-2014-3477 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2014-3477 affect?

CVE-2014-3477 affects d-bus, dbus. Severity is medium (CVSS 4.0). The dbus-daemon in D-Bus 1.2.x through 1.4.x, 1.6.x before 1.6.20, and 1.8.x before 1.8.4, sends an AccessDenied error to the service instead of a client when the client is prohibited from accessing the service, which allows local users to

How urgent is CVE-2014-3477?

Priority 24/100. No elevated risk signals yet.

Related CVEs

CVE-2014-3639 LOW 2.1 MITIGATE UPGRADE The dbus-daemon in D-Bus before 1.6.24 and 1.8.x before 1.8.8 does not properly close old connections, which a
CVE-2014-3638 LOW 2.1 UPGRADE MITIGATE The bus_connections_check_reply function in config-parser.c in D-Bus before 1.6.24 and 1.8.x before 1.8.8 allo
CVE-2014-3636 LOW 1.9 UPGRADE MITIGATE D-Bus 1.3.0 through 1.6.x before 1.6.24 and 1.8.x before 1.8.8 allows local users to (1) cause a denial of ser
CVE-2014-3635 MEDIUM 4.4 UPGRADE MITIGATE Off-by-one error in D-Bus 1.3.0 through 1.6.x before 1.6.24 and 1.8.x before 1.8.8, when running on a 64-bit s

References

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