CVE-2009-4492: Input Validation
First published: Wed Jan 13 2010(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| rubygems/webrick | <=1.3.1 | 1.4.0 |
| WEBrick | =1.3.1 | |
| Ruby | >=1.8.6<=1.8.6.383 | |
| Ruby | >=1.8.7<=1.8.7.248 | |
| Ruby | >=1.9.1<=1.9.1.376 |
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Reference Links
- http://www.ush.it/team/ush/hack_httpd_escape/adv.txt
- http://www.securityfocus.com/bid/37710
- http://securitytracker.com/id?1023429
- http://secunia.com/advisories/37949
- http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection
- http://www.vupen.com/english/advisories/2010/0089
- http://www.redhat.com/support/errata/RHSA-2011-0908.html
- http://www.redhat.com/support/errata/RHSA-2011-0909.html
- http://www.securityfocus.com/archive/1/508830/100/0/threaded
- https://nvd.nist.gov/vuln/detail/CVE-2009-4492
- https://github.com/advisories/GHSA-6mq2-37j5-w6r6 (Advisory)
- https://web.archive.org/web/20100113155532/http://www.vupen.com/english/advisories/2010/0089
- https://web.archive.org/web/20100815010948/http://secunia.com/advisories/37949
- https://web.archive.org/web/20170402100552/http://securitytracker.com/id?1023429
- https://web.archive.org/web/20170908140655/http://www.securityfocus.com/archive/1/508830/100/0/threaded
- https://web.archive.org/web/20200228145937/http://www.securityfocus.com/bid/37710
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.
- collector/nvd-historical
- collector/github-advisory-latest
- alias/GHSA-6mq2-37j5-w6r6
- alias/CVE-2009-4492
- collector/github-advisory
- agent/type
- agent/remedy
- agent/references
- agent/weakness
- agent/severity
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/trending
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-api
- agent/software-canonical-lookup-request
- collector/nvd-cve
- collector/nvd-index
- package-manager/rubygems
- vendor/ruby-lang
- canonical/webrick
- version/webrick/1.3.1
- canonical/ruby
- version/ruby/1.8.6
- version/ruby/1.8.6.383
- version/ruby/1.8.7
- version/ruby/1.8.7.248
- version/ruby/1.9.1
- version/ruby/1.9.1.376