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D-Bus: Denial of Service

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201308-02 / d-bus
Release Date August 22, 2013
Latest Revision August 22, 2013: 1
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
sys-apps/dbus < 1.6.12 >= 1.6.12 All supported architectures

Related bugreports: #473190

Synopsis

A vulnerability has been found in D-Bus which allows a local user to cause a Denial of Service.

2.  Impact Information

Background

D-Bus is a message bus system which processes can use to talk to each other.

Description

D-Bus’ _dbus_printf_string_upper_bound() function crashes if it returns exactly 1024 bytes.

Impact

A local attacker could provide specially-crafted input to an application using D-Bus which would cause _dbus_printf_string_upper_bound() to return 1024 bytes and crash, causing a Denial of Service condition.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All D-Bus users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-apps/dbus-1.6.12"

4.  References



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Page updated August 22, 2013

Summary: This is a Gentoo Linux Security Advisory

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