Bug 974109 - (CVE-2013-2168) CVE-2013-2168 dbus: Crash of system services that use libdbus (DoS) due to non-portable use of va_list in UNIX format string wrapper
CVE-2013-2168 dbus: Crash of system services that use libdbus (DoS) due to no...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20130613,repor...
: Security
Depends On: 974128
Blocks:
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Reported: 2013-06-13 08:45 EDT by Jan Lieskovsky
Modified: 2013-06-29 14:22 EDT (History)
3 users (show)

See Also:
Fixed In Version: dbus-1.4.26, dbus-1.6.12, dbus-1.7.4
Doc Type: Bug Fix
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Last Closed: 2013-06-19 05:12:19 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Jan Lieskovsky 2013-06-13 08:45:13 EDT
A denial of service flaw was found in the way UNIX system D-BUS format string wrapper implementation of D-BUS, a system for sending messages between applications, used to measure the length of the provided format string and its arguments in certain circumstances. A remote attacker could supply a specially-crafted input to an application / service, utilizing the services / functionality of the libdbus library that, when processed would lead to that application / service crash.

References:
[1] http://www.openwall.com/lists/oss-security/2013/06/13/2

Relevant upstream patch:
[2] http://cgit.freedesktop.org/dbus/dbus/commit/?id=954d75b2b64e4799f360d2a6bf9cff6d9fee37e7
Comment 1 Jan Lieskovsky 2013-06-13 08:53:13 EDT
Original upstream report for the issue that led to introduction of this problem:
[3] https://bugs.freedesktop.org/show_bug.cgi?id=11668

Upstream patch that introduced the issue (dbus-1.4.16 and dbus-1.5.8):
[4] http://cgit.freedesktop.org/dbus/dbus/commit/?id=7fc9c026669976463adcd1e02ad19c582ed27289
Comment 2 Jan Lieskovsky 2013-06-13 08:54:54 EDT
This issue did NOT affect the versions of the dbus package, as shipped with Red Hat Enterprise Linux 5 and 6 (as they did not introduce the upstream change [4] yet).

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This issue did NOT affect the version of the dbus package, as shipped with Fedora release of 17 (as it did not introduce the upstream change [4] yet).

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This issue affects the version of the dbus package, as shipped with Fedora release of 18. Please schedule an update.
Comment 3 Jan Lieskovsky 2013-06-13 09:28:40 EDT
Created dbus tracking bugs for this issue

Affects: fedora-18 [bug 974128]
Comment 4 Jan Lieskovsky 2013-06-13 09:30:54 EDT
Statement:

Not vulnerable. This issue did not affect the versions of dbus as shipped with Red Hat Enterprise Linux 5 and 6 as they did not include the upstream commit 7fc9c026669976463adcd1e02ad19c582ed27289 that introduced this issue.
Comment 8 Fedora Update System 2013-06-29 14:22:34 EDT
dbus-1.6.12-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

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