CVE-2009-4492: Input Validation
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2009-4492?
CVE-2009-4492 is considered to have a moderate severity level due to the potential for remote exploitation.
How do I fix CVE-2009-4492?
To fix CVE-2009-4492, upgrade WEBrick to version 1.4.0 or later.
Which versions of WEBrick are affected by CVE-2009-4492?
WEBrick versions up to and including 1.3.1 are affected by CVE-2009-4492.
What types of attacks can CVE-2009-4492 enable?
CVE-2009-4492 might allow remote attackers to modify a window's title or potentially execute arbitrary commands.
Is any version of Ruby affected by CVE-2009-4492?
Yes, Ruby versions 1.8.6 through patchlevel 383, 1.8.7 through patchlevel 248, 1.9.1 through patchlevel 376 are affected by CVE-2009-4492.