USN-3048-1: curl vulnerabilities

Releases

• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

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

Details

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

• libcurl3 - 7.47.0-1ubuntu2.1
• libcurl3-gnutls - 7.47.0-1ubuntu2.1
• libcurl3-nss - 7.47.0-1ubuntu2.1

Ubuntu 14.04

• libcurl3 - 7.35.0-1ubuntu2.8
• libcurl3-gnutls - 7.35.0-1ubuntu2.8
• libcurl3-nss - 7.35.0-1ubuntu2.8

Ubuntu 12.04

• libcurl3 - 7.22.0-3ubuntu4.16
• libcurl3-gnutls - 7.22.0-3ubuntu4.16
• libcurl3-nss - 7.22.0-3ubuntu4.16

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

References

• CVE-2016-5419
• CVE-2016-5420
• CVE-2016-5421