CVE-2012-2374

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.

Published: 2012-05-23 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-2374 is rated Low Risk (38.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.33%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-2374

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.52% 0.33% -0.19%
2 2025-03-29 0.33% 0.52% +0.19%
3 2025-03-17 — 0.33% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-2374

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2012-2374

GitHub Security Advisory for CVE-2012-2374

GHSA-f7fv-v9rh-prvc · Severity: high · Ecosystem: pip — Tornado CRLF injection vulnerability

OS Trackers for CVE-2012-2374

vendor priority summary link
debian low CVE-2012-2374 low priority: Debian including 1 source packages (python-tornado), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-2374
ubuntu medium CVE-2012-2374 medium priority: Ubuntu including 1 source packages (python-tornado), 6 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): DNE 2, not-affected 2, released 2. https://ubuntu.com/security/CVE-2012-2374

Affected software / configurations for CVE-2012-2374

Vendor Product Version Raw CPE
tornadoweb tornado <= 2.2 cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:*
tornadoweb tornado 1.0 cpe:2.3:a:tornadoweb:tornado:1.0:*:*:*:*:*:*:*
tornadoweb tornado 1.0.1 cpe:2.3:a:tornadoweb:tornado:1.0.1:*:*:*:*:*:*:*
tornadoweb tornado 1.1 cpe:2.3:a:tornadoweb:tornado:1.1:*:*:*:*:*:*:*
tornadoweb tornado 1.1.1 cpe:2.3:a:tornadoweb:tornado:1.1.1:*:*:*:*:*:*:*
tornadoweb tornado 1.2 cpe:2.3:a:tornadoweb:tornado:1.2:*:*:*:*:*:*:*
tornadoweb tornado 1.2.1 cpe:2.3:a:tornadoweb:tornado:1.2.1:*:*:*:*:*:*:*
tornadoweb tornado 2.0 cpe:2.3:a:tornadoweb:tornado:2.0:*:*:*:*:*:*:*
tornadoweb tornado 2.1 cpe:2.3:a:tornadoweb:tornado:2.1:*:*:*:*:*:*:*
tornadoweb tornado 2.1.1 cpe:2.3:a:tornadoweb:tornado:2.1.1:*:*:*:*:*:*:*

References for CVE-2012-2374

cvelogic Threat Intelligence