USN-3048-1: curl vulnerabilities

8 August 2016

curl vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


Several security issues were fixed in curl.

Software Description

  • curl - HTTP, HTTPS, and FTP client and client libraries


Bru Rom discovered that curl incorrectly handled client certificates when resuming a TLS session. (CVE-2016-5419)

It was discovered that curl incorrectly handled client certificates when reusing TLS connections. (CVE-2016-5420)

Marcelo Echeverria and Fernando Muñoz discovered that curl incorrectly reused a connection struct, contrary to expectations. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-5421)

Update instructions

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

Ubuntu 16.04 LTS
libcurl3 - 7.47.0-1ubuntu2.1
libcurl3-gnutls - 7.47.0-1ubuntu2.1
libcurl3-nss - 7.47.0-1ubuntu2.1
Ubuntu 14.04 LTS
libcurl3 - 7.35.0-1ubuntu2.8
libcurl3-gnutls - 7.35.0-1ubuntu2.8
libcurl3-nss - 7.35.0-1ubuntu2.8
Ubuntu 12.04 LTS
libcurl3 - 7.22.0-3ubuntu4.16
libcurl3-gnutls - 7.22.0-3ubuntu4.16
libcurl3-nss - 7.22.0-3ubuntu4.16

To update your system, please follow these instructions:

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