medium
5.5
CWE
404
Advisory Published
Updated

CVE-2020-12049

First published: Mon Jun 08 2020(Updated: )

An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Freedesktop Dbus>=1.3.0<1.12.18
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
Canonical Ubuntu Linux=20.04
IBM Cloud Pak for Security (CP4S)<=1.7.2.0
IBM Cloud Pak for Security (CP4S)<=1.7.1.0
IBM Cloud Pak for Security (CP4S)<=1.7.0.0
ubuntu/dbus<1.12.2-1ubuntu1.2
1.12.2-1ubuntu1.2
ubuntu/dbus<1.12.14-1ubuntu2.1
1.12.14-1ubuntu2.1
ubuntu/dbus<1.12.16-2ubuntu2.1
1.12.16-2ubuntu2.1
ubuntu/dbus<1.6.18-0ubuntu4.5+
1.6.18-0ubuntu4.5+
ubuntu/dbus<1.12.18<1.10.30
1.12.18
1.10.30
ubuntu/dbus<1.10.6-1ubuntu3.6
1.10.6-1ubuntu3.6
debian/dbus
1.12.28-0+deb11u1
1.12.24-0+deb11u1
1.14.10-1~deb12u1
1.14.10-4

Remedy

http://www.openwall.com/lists/oss-security/2020/06/04/3

Remedy

https://gitlab.freedesktop.org/dbus/dbus/-/commit/272d484283883fa9ff95b69d924fff6cd34842f5

Remedy

https://gitlab.freedesktop.org/dbus/dbus/-/commit/8bc1381819e5a845331650bfa28dacf6d2ac1748

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-12049?

    CVE-2020-12049 is a vulnerability in D-Bus that can be exploited to cause a denial of service.

  • How does CVE-2020-12049 impact D-Bus?

    CVE-2020-12049 can result in a denial of service by leaking file descriptors when a message exceeds the per-message file descriptor limit.

  • What is the severity of CVE-2020-12049?

    The severity of CVE-2020-12049 is medium, with a severity value of 5.5.

  • How can I fix CVE-2020-12049?

    To fix CVE-2020-12049, update to the recommended versions of D-Bus provided by your operating system or package manager.

  • Where can I find more information about CVE-2020-12049?

    You can find more information about CVE-2020-12049 in the references provided: [link 1](http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html), [link 2](http://www.openwall.com/lists/oss-security/2020/06/04/3), [link 3](https://gitlab.freedesktop.org/dbus/dbus/-/issues/294).

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