HIGH
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 May 23, 2012
8.7
HIGHCVSS 4.0
EPSS 1.36%
Description
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.
Affected products
No data.
OR
- ≤ 2.2
- 1.0
- 1.0.1
- 1.1
- 1.1.1
- 1.2
- 1.2.1
- 2.0
- 2.1
- 2.1.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
8.7 HIGH GHSA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality None
Vulnerable System Integrity High
Vulnerable System Availability None
Subsequent System Confidentiality None
Subsequent System Integrity None
Subsequent System Availability None
7.5 HIGH GHSA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.36% 0.01358
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01358
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.36% (0.01358) | 70.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.36% (0.01362) | 68.05th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.33% (0.00329) | 53.67th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.37% (0.00374) | 73.59th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.37% (0.00374) | 71.95th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.37% (0.00374) | 68.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
Weaknesses (1)
References (11)
- http://openwall.com/lists/oss-security/2012/05/18/12 mailing-listx_refsource_MLIST
- http://secunia.com/advisories/49185 third-party-advisoryx_refsource_SECUNIA
- http://www.openwall.com/lists/oss-security/2012/05/18/6 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/53612 vdb-entryx_refsource_BID
- http://www.tornadoweb.org/documentation/releases/v2.2.1.html x_refsource_CONFIRMVendor Advisory
- https://github.com/advisories/GHSA-f7fv-v9rh-prvc Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/tornado/PYSEC-2012-5.yaml
- https://github.com/tornadoweb/tornado/commit/1ae91f6d58e6257e0ab49d295d8741ce1727bdb7
- https://nvd.nist.gov/vuln/detail/CVE-2012-2374
- https://web.archive.org/web/20140720192646/http://secunia.com/advisories/49185
- https://web.archive.org/web/20200229124524/http://www.securityfocus.com/bid/53612
| Link | Providers | Tags |
|---|---|---|
| http://openwall.com/lists/oss-security/2012/05/18/12 | mailing-listx_refsource_MLIST | |
| http://secunia.com/advisories/49185 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.openwall.com/lists/oss-security/2012/05/18/6 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/53612 | vdb-entryx_refsource_BID | |
| http://www.tornadoweb.org/documentation/releases/v2.2.1.html | x_refsource_CONFIRMVendor Advisory | |
| https://github.com/advisories/GHSA-f7fv-v9rh-prvc | Advisory | |
| https://github.com/pypa/advisory-database/tree/main/vulns/tornado/PYSEC-2012-5.yaml | ||
| https://github.com/tornadoweb/tornado/commit/1ae91f6d58e6257e0ab49d295d8741ce1727bdb7 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2012-2374 | ||
| https://web.archive.org/web/20140720192646/http://secunia.com/advisories/49185 | ||
| https://web.archive.org/web/20200229124524/http://www.securityfocus.com/bid/53612 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published May 23, 2012
Updated Aug 6, 2024
Reserved Apr 19, 2012
Link CVE-2012-2374
CISA Vulnrichment
GHSA-F7FV-V9RH-PRVC Updated n/a