Vulnerability DatabaseCVE-2019-12387
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CVE-2019-12387
Published:June 10, 2019
Updated:May 17, 2026
In Twisted before 19.2.1, twisted.web did not validate or sanitize URIs or HTTP methods, allowing an attacker to inject invalid characters such as CRLF.
Affected Packages
twisted (PYTHON):
Affected version(s) >=1.0.1 <19.2.1
Fix Suggestion:
Update to version 19.2.1
Related Resources (19)
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ344MAWNN7N/
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00030.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ344MAWNN7N
https://github.com/twisted/twisted
https://usn.ubuntu.com/4308-2/
https://usn.ubuntu.com/4308-1/
https://github.com/advisories/GHSA-6cc5-2vg4-cc7m
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ344MAWNN7N
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00042.html
https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2019-128.yaml
https://usn.ubuntu.com/4308-2
https://access.redhat.com/security/cve/CVE-2019-12387
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ344MAWNN7N/
https://nvd.nist.gov/vuln/detail/CVE-2019-12387
https://twistedmatrix.com/pipermail/twisted-python/2019-June/032352.html
https://usn.ubuntu.com/4308-1
https://labs.twistedmatrix.com/2019/06/twisted-1921-released.html
https://www.oracle.com/security-alerts/cpuapr2020.html
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of CRLF Sequences ('CRLF Injection')
CWE-93
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-74
EPSS
Base Score:
0.52