CVE Tools
Sign in

CVE-2009-4492

Published: Jan 13, 2010Updated: Apr 23, 2026 Sources: CVE List NVD GHSANVD-CWE-noinfo
NVD MITRE
7.5CVSSHIGH
EPSS Score
16.1%
Top 3.5%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LAu:NC:PI:PA:P
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Au:NAuthentication
None
Impact
C:PConfidentiality
Partial
I:PIntegrity
Partial
A:PAvailability
Partial
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

webrickruby-lang
Library
OSS Libraries / generic-library
webrickRubyGemsOSS Libraries
n/an/a
ruby-langoss-projectOSS Librariesaka ruby, rexml
rubygemspackage-ecosystemOSS Libraries

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

http://secunia.com/advisories/37949
secunia.com
http://securitytracker.com/id?1023429
securitytracker.com
http://www.redhat.com/support/errata/RHSA-2011-0908.html
redhat.com
and 15 more references View all →

Timeline

Published
Jan 13, 2010
Last Updated
Apr 23, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2009-4492 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows