CVE-2009-3287 json
High severity vulnerability that affects thin
published 2009-09-22 17 y ago modified 2026-06-16 4 mo ago also GHSA-j24p-r6wx-r79w , EUVD-2017-0256
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.
Patch / fix
- rubygems thin 1.2.4
- thin Debian 14, Debian 13, Debian 12 1.2.4-1
debian advisories DEBIAN-CVE-2009-3287
Exploit prediction
1.38% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | thin | <1.2.4 |
1.2.4 |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/macournoyer/thin/commit/7bd027914c5ffd36bb408ef47dc749de3b6e063a
web, patch
-
github.com
/macournoyer/thin/blob/master/CHANGELOG
web
-
openwall.com
/lists/oss-security/2009/09/12/1
mailing-list, web
-
nvd.nist.gov
/vuln/detail/CVE-2009-3287
advisory
-
github.com
/advisories/GHSA-j24p-r6wx-r79w
advisory
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/thin/CVE-2009-3287.yml
web
-
github.com
/macournoyer/thin
package
Sources
- CVE List CVE-2009-3287
- GitHub Advisory GHSA-j24p-r6wx-r79w
- NVD CVE-2009-3287
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