CVE-2019-12387

Name: CVE-2019-12387
Creator: NVD / NIST
Published: 2019-06-10T12:29:00.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 2.54%

Last modified Jun 17, 2026

CVE-2019-12387 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 2.54% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

2.54%

82.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Twisted	Twisted	< 19.2.1
Fedoraproject	Fedora	29
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10
Oracle	Zfs Storage Appliance Kit	8.8
Oracle	Solaris	11

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00030.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00042.htmlBroken Link
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2Patch, Third Party Advisory
https://labs.twistedmatrix.com/2019/06/twisted-1921-released.htmlExploit, Release Notes, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ344MAWNN7N/
https://twistedmatrix.com/pipermail/twisted-python/2019-June/032352.htmlExploit, Release Notes, Vendor Advisory
https://usn.ubuntu.com/4308-1/Third Party Advisory
https://usn.ubuntu.com/4308-2/Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.htmlPatch, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00030.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00042.htmlBroken Link
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2Patch, Third Party Advisory
https://labs.twistedmatrix.com/2019/06/twisted-1921-released.htmlExploit, Release Notes, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ344MAWNN7N/
https://twistedmatrix.com/pipermail/twisted-python/2019-June/032352.htmlExploit, Release Notes, Vendor Advisory
https://usn.ubuntu.com/4308-1/Third Party Advisory
https://usn.ubuntu.com/4308-2/Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.htmlPatch, Third Party Advisory

Timeline

Published: Jun 10, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-12387?

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.

How severe is CVE-2019-12387?

CVE-2019-12387 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 2.54% probability of exploitation in the next 30 days.

How do I fix CVE-2019-12387?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-12387?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST