National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-4492)

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Last updated: Sun May 26 01:21:49 EDT 2013

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Vulnerability Summary for CVE-2009-4492

Original release date:01/13/2010

Last revised:08/24/2011

Source: US-CERT/NIST

Overview

WEBrick 1.3.1 in Ruby 1.8.6 through patchlevel 383, 1.8.7 through patchlevel 248, 1.8.8dev, 1.9.1 through patchlevel 376, and 1.9.2dev writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:P/I:N/A:N) (legend)

Impact Subscore: 2.9

Exploitability Subscore: 10.0

CVSS Version 2 Metrics:

Access Vector: Network exploitable

Access Complexity: Low

Authentication: Not required to exploit

Impact Type:Allows unauthorized disclosure of information

Per: http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection "Affected versions * Ruby 1.8.6 patchlevel 383 and all prior versions * Ruby 1.8.7 patchlevel 248 and all prior versions * Development versions of Ruby 1.8 (1.8.8dev) * Ruby 1.9.1 patchlevel 376 and all prior versions * Development versions of Ruby 1.9 (1.9.2dev)"

Vendor Statements (disclaimer)

Official Statement from Red Hat (01/21/2010)

Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-4492 The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw.

References to Advisories, Solutions, and Tools

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External Source: CONFIRM

Name: http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection

Type: Advisory; Patch Information

Hyperlink:http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection

External Source: VUPEN

Name: ADV-2010-0089

Hyperlink:http://www.vupen.com/english/advisories/2010/0089

External Source: MISC

Name: http://www.ush.it/team/ush/hack_httpd_escape/adv.txt

Hyperlink:http://www.ush.it/team/ush/hack_httpd_escape/adv.txt

External Source: BID

Name: 37710