CVE-2012-2374 json
Tornado CRLF injection vulnerability
published 2012-05-23 14 y ago modified 2026-06-16 4 mo ago also GHSA-f7fv-v9rh-prvc , PYSEC-2012-5 , EUVD-2012-0029
- cvss
- 7.5
- version 3.1, GitHub
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
CRLF injection vulnerability in the tornado.web.RequestHandler.set_header function in Tornado before 2.2.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via crafted input.
Patch / fix
- pypi tornado 2.2.1
- python-tornado Debian 14, Debian 13, Debian 12 2.1.0-3
debian advisories DEBIAN-CVE-2012-2374
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2012-2374 updated cvss 5.0
python-tornado: Tornado v2.2.1 tornado.web.RequestHandler.set_header() fix to prevent header injection
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | tornado | <2.2.1 |
2.2.1 |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/tornadoweb/tornado/commit/1ae91f6d58e6257e0ab49d295d8741ce1727bdb7
web
-
tornadoweb.org
/documentation/releases/v2.2.1.html
web, vendor-advisory
-
securityfocus.com
/bid/53612
vdb-entry, web
-
secunia.com
/advisories/49185
third-party-advisory, advisory
-
openwall.com
/lists/oss-security/2012/05/18/6
mailing-list, web
-
openwall.com
/lists/oss-security/2012/05/18/12
mailing-list, web
-
nvd.nist.gov
/vuln/detail/CVE-2012-2374
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/tornado/PYSEC-2012-5.yaml
web
-
github.com
/tornadoweb/tornado
package
-
web.archive.org
/web/20140720192646/http://secunia.com/advisories/49185
web
-
web.archive.org
/web/20200229124524/http://www.securityfocus.com/bid/53612
web
-
github.com
/advisories/GHSA-f7fv-v9rh-prvc
advisory
Sources
- CVE List CVE-2012-2374
- GitHub Advisory GHSA-f7fv-v9rh-prvc
- NVD CVE-2012-2374
- OSV PYSEC-2012-5
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.