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USN-4784-1: Xerces-C++ vulnerabilities

15 March 2021

Several security issues were fixed in Xerces-C++.

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Releases

Packages

  • xerces-c - Validating XML parser written in a portable subset of C++

Details

It was discovered that Xerces-C++ XML Parser mishandles certain kinds of
external DTD references, resulting in a user-after-free. An attacker could
use this vulnerability to cause a denial of service (crash) or possibly
execute arbitrary code. This issue affected only Ubuntu 16.04 ESM.
(CVE-2016-2099)

It was discovered that Xerces-C++ XML Parser fails to successfully parse a
DTD that is too deeply nested. An unauthenticated attacker could use this
vulnerability to cause a denial of service. This issue affected only Ubuntu
16.04 ESM. (CVE-2016-4463)

It was discovered that Xerces-C++ mishandles certain kinds of external DTD
references, resulting in dereference of a NULL pointer. An attacker could
use this vulnerability to cause a denial of service. (CVE-2017-12627)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 18.04
Ubuntu 16.04

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