RHBA-2011:0784 - Bug Fix Advisory

Topic

An updated xinetd package that fixes two bugs is now available for Red Hat
Enterprise Linux 6.

Description

The xinetd daemon is a secure replacement for inetd, the Internet services
daemon. It provides access control for all services based on the address of the
remote host and/or on time of access, and can prevent denial of service attacks.

This update fixes the following bugs:

• When a binary is built with the "RELRO" flag, the ELF sections are reordered

to include internal data sections before program's data sections, and the Global
Offset Table (GOT) address section of the resulting ELF file is mapped
read-only. This ensures that any attempt to overwrite the GOT entry and gain
control over the execution flow of a program fails with an error. Because of
this, the xinetd daemon is now compiled with full RELRO by using the
"-Wl,-z,relro,-z,now" gcc option. (BZ#676013)

• When a log file of a xinetd-controlled service exceeded the size limit

specified in its configuration file, xinetd terminated unexpectedly with a
segmentation fault. With this update, a patch has been applied to address this
issue, and the xinetd daemon no longer crashes. (BZ#678493)

All users of xinetd are advised to upgrade to this updated package, which fixes
these bugs.

Solution

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

This update is available via 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 Server - Extended Life Cycle Support 6 x86_64
• 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 Power, big endian 6 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 Life Cycle Support 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 678493 - RHEL4 SIGSEGV in xinetd when application's logfile hit size limit

CVEs

(none)

References

(none)