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USN-4308-2: Twisted vulnerabilities

30 March 2020

Several security issues were fixed in Twisted.



  • twisted - Event-based framework for internet applications


USN-4308-1 fixed several vulnerabilities in Twisted. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

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.

It was discovered that Twisted incorrectly verified XMPP TLS certificates.
A remote attacker could possibly use this issue to perform a
machine-in-the-middle attack and obtain sensitive information. (CVE-2019-12855)

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,

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.04

In general, a standard system update will make all the necessary changes.

Related notices

  • USN-4308-1: python-twisted-words, python-twisted-core, python-twisted-names, python-twisted-runner, twisted, python3-twisted, python3-twisted-bin, twisted-doc, python-twisted-mail, python-twisted-news, python-twisted, python-twisted-bin, python-twisted-web, python-twisted-conch