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CVE-2009-4492
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…
High7.5EPSS 16.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 16.2% · top 3.0% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- n/a
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- RubyGemswebrickGHSA-6mq2-37j5-w6r6 (opens in a new tab)
References (9)
- http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2011:0909 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 37949 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2010-0089 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- RHSA-2011:0908 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://www.ush.it/team/ush/hack_httpd_escape/adv.txt (opens in a new tab)x_refsource_MISCx_transferred
- 37710 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20100110 Nginx, Varnish, Cherokee, thttpd, mini-httpd, WEBrick, Orion, AOLserver, Yaws and Boa log escape sequence injection (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 1023429 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-6mq2-37j5-w6r6 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2009-4492)Record last updated .