RHBA-2012:0430 - Bug Fix Advisory

Topic

Updated curl packages that fix two bugs are now available for Red Hat Enterprise
Linux 6.

Description

The curl packages provide the libcurl library and the cURL command line tool for
transferring data using various protocols, including HTTP, FTP, FILE, LDAP,
TELNET, TFTP, SCP. Both, libcurl and cURL, support many useful capabilities,
such as user authentication, proxy support, FTP uploading, HTTP POST and PUT
methods, SSL certificates, and file transfer resume.

This update fixes the following bugs:

• Previously, SSL connections could not be established with libcurl if the

selected Network Security Services (NSS) database was broken or invalid. This
update modifies the code of libcurl to initialize NSS without a valid database,
which allows applications to establish SSL connections as expected in this
scenario. (BZ#800903)

• The OpenLDAP suite was recently modified to use NSS instead of OpenSSL as the

SSL back end. This change led to collisions between libcurl and OpenLDAP on NSS
initialization and shutdown. Consequently, applications that were using both,
libcurl and OpenLDAP, failed to establish SSL connections. This update modifies
libcurl to use the same NSS API as OpenLDAP, which prevents collisions from
occurring. Applications using OpenLDAP and libcurl can now connect to the LDAP
server over SSL as expected. (BZ#800904)

All users of curl are advised to upgrade to these updated packages, which fix
these bugs. All running applications that use libcurl have to be restarted for
this update to take effect.

Solution

Before applying this update, make sure all previously-released errata relevant
to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.2 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.2 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.2 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.2 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.2 i386
• Red Hat Storage 2.0 x86_64
• Red Hat Gluster Storage Server for On-premise 2.0 x86_64
• Red Hat Storage for Public Cloud (via RHUI) 2.0 x86_64
• Red Hat Enterprise Linux Server - AUS 6.2 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 800904 - OpenLDAP linked with Mozilla NSS intermittently fails to initialize

CVEs

(none)

References

(none)