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Gentoo: 201308-02 Normal: D-Bus DoS Attack Exploit Details and Mitigation

gentoo
Calendar Grey August 22, 2013
Scroller Gentoo
Security flaw in D-Bus discovered in Gentoo; local users can potentially cause Denial of Service. Please update immediately for protection!
A vulnerability has been found in D-Bus which allows a local user to cause a Denial of Service.

Summary

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

Topics%20covered

Topics Covered

security advisory denial of service gentoo dbus normal severity

Resolution

All D-Bus users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-apps/dbus-1.6.12"

References

[ 1 ] CVE-2013-2168 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-2168

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201308-02
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: D-Bus: Denial of Service
Date: August 22, 2013
Bugs: #473190
ID: 201308-02

Topics%20covered

Topics Covered

security advisory denial of service gentoo dbus normal severity

Synopsis

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

Background

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

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-apps/dbus < 1.6.12 >= 1.6.12

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.

Workaround

There is no known workaround at this time.