Ubuntu 16.04 LTS / 18.04 LTS / 19.10 : Twisted vulnerabilities (USN-4308-1) (Ping Flood) (Reset Flood) (Settings Flood)

critical Nessus Plugin ID 134758
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The remote Ubuntu host is missing one or more security-related patches.


it was discovered that Twisted incorrectly validated or sanitized certain URIs or HTTP methods. A remote attacker could use this issue to inject invalid characters and possibly perform header injection attacks. (CVE-2019-12387)

It was discovered that Twisted incorrectly verified XMPP TLS certificates. A remote attacker could possibly use this issue to perform a man-in-the-middle attack and obtain sensitive information.

It was discovered that Twisted incorrectly handled HTTP/2 connections.
A remote attacker could possibly use this issue to cause Twisted to hang or consume resources, leading to a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.10. (CVE-2019-9512, CVE-2019-9514, CVE-2019-9515)

Jake Miller and ZeddYu Lu discovered that Twisted incorrectly handled certain content-length headers. A remote attacker could possibly use this issue to perform HTTP request splitting attacks. (CVE-2020-10108, CVE-2020-10109).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

See Also


Plugin Details

Severity: Critical

ID: 134758

File Name: ubuntu_USN-4308-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 3/20/2020

Updated: 9/17/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-10109


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:python-twisted, p-cpe:/a:canonical:ubuntu_linux:python-twisted-bin, p-cpe:/a:canonical:ubuntu_linux:python-twisted-web, p-cpe:/a:canonical:ubuntu_linux:python3-twisted, p-cpe:/a:canonical:ubuntu_linux:python3-twisted-bin, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:19.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 3/19/2020

Vulnerability Publication Date: 6/10/2019

Reference Information

CVE: CVE-2019-12387, CVE-2019-12855, CVE-2019-9512, CVE-2019-9514, CVE-2019-9515, CVE-2020-10108, CVE-2020-10109

USN: 4308-1