CVE-2009-4492

Public Exploit

Description

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.

7.5

CVSS

Severity: High

CVSS 2.0 •

EPSS 16.81% Top 10%

Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory secunia.com Vendor Advisory ruby-lang.org

Affected: n/a n/a

References

Link	Tags
http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection	patch vendor advisory
http://www.redhat.com/support/errata/RHSA-2011-0909.html	third party advisory vendor advisory
http://secunia.com/advisories/37949	not applicable third party advisory vendor advisory
http://www.vupen.com/english/advisories/2010/0089	vdb entry permissions required
http://www.redhat.com/support/errata/RHSA-2011-0908.html	third party advisory vendor advisory
http://www.ush.it/team/ush/hack_httpd_escape/adv.txt	broken link exploit
http://www.securityfocus.com/bid/37710	exploit vdb entry third party advisory broken link
http://www.securityfocus.com/archive/1/508830/100/0/threaded	mailing list vdb entry third party advisory broken link
http://securitytracker.com/id?1023429	exploit vdb entry third party advisory broken link

Frequently Asked Questions

What is the severity of CVE-2009-4492?: CVE-2009-4492 has been scored as a high severity vulnerability.
How to fix CVE-2009-4492?: To fix CVE-2009-4492, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-4492 being actively exploited in the wild?: It is possible that CVE-2009-4492 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~17% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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