Skip to navigation

Security Advisory Low: xinetd security and bug fix update

Advisory: RHSA-2013:1302-1
Type: Security Advisory
Severity: Low
Issued on: 2013-09-30
Last updated on: 2013-09-30
Affected Products: Red Hat Enterprise Linux (v. 5 server)
Red Hat Enterprise Linux Desktop (v. 5 client)
CVEs (cve.mitre.org): CVE-2012-0862

Details

An updated xinetd package that fixes one security issue and two bugs is now
available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

The xinetd package provides a secure replacement for inetd, the Internet
services daemon. xinetd 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-access attacks.

When xinetd services are configured with the "TCPMUX" or "TCPMUXPLUS" type,
and the tcpmux-server service is enabled, those services are accessible via
port 1. It was found that enabling the tcpmux-server service (it is
disabled by default) allowed every xinetd service, including those that are
not configured with the "TCPMUX" or "TCPMUXPLUS" type, to be accessible via
port 1. This could allow a remote attacker to bypass intended firewall
restrictions. (CVE-2012-0862)

Red Hat would like to thank Thomas Swan of FedEx for reporting this issue.

This update also fixes the following bugs:

* Prior to this update, a file descriptor array in the service.c source
file was not handled as expected. As a consequence, some of the descriptors
remained open when xinetd was under heavy load. Additionally, the system
log was filled with a large number of messages that took up a lot of disk
space over time. This update modifies the xinetd code to handle the file
descriptors correctly and messages no longer fill the system log.
(BZ#852274)

* Prior to this update, services were disabled permanently when their CPS
limit was reached. As a consequence, a failed bind operation could occur
when xinetd attempted to restart the service. This update adds additional
logic that attempts to restart the service. Now, the service is only
disabled if xinetd cannot restart the service after 30 attempts.
(BZ#811000)

All users of xinetd are advised to upgrade to this updated package, which
contains backported patches to correct these issues.


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/site/articles/11258

Updated packages

Red Hat Enterprise Linux (v. 5 server)

SRPMS:
xinetd-2.3.14-19.el5.src.rpm
File outdated by:  RHSA-2013:1409
    MD5: 5e9d69bca71f6a93217d80b1307aec82
SHA-256: cf674fd772d65b1f4696b420a8da62f95fa971b04504d2c02aa71ee42772222e
 
IA-32:
xinetd-2.3.14-19.el5.i386.rpm
File outdated by:  RHSA-2013:1409
    MD5: 716c414de3dea266995c848aef347375
SHA-256: fe40a858efa7cc0920527b9f1bcb8396435abfe866bdbf5cf15757dc7ebe8a20
xinetd-debuginfo-2.3.14-19.el5.i386.rpm
File outdated by:  RHSA-2013:1409
    MD5: 0b57b69b68c994d05cd69aaa17a66a68
SHA-256: ddf166b1ae3c0ffe106a5a92364f0918d6f9ff6f216682f2d229fa53caf6a9f9
 
IA-64:
xinetd-2.3.14-19.el5.ia64.rpm
File outdated by:  RHSA-2013:1409
    MD5: eee9eec830dc94239d0db7f4583045fb
SHA-256: ad4ede48060d8e56ba230ac0b3b182730f123227636b34d8bfa8ff82270ce48e
xinetd-debuginfo-2.3.14-19.el5.ia64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 5aeb982be5a8e7e75e6f359ed23a0067
SHA-256: 5a4733b8a935054ef032aa0ebb6dc3b9567cb9bd11a675871e4031873620d3eb
 
PPC:
xinetd-2.3.14-19.el5.ppc.rpm
File outdated by:  RHSA-2013:1409
    MD5: 2fe93fc1870c9605c576c4cc578ed90f
SHA-256: 76aaab0819ce1cbdbf1e11dca3fab2eb0a7e187887952c01c8921bd4d6328669
xinetd-debuginfo-2.3.14-19.el5.ppc.rpm
File outdated by:  RHSA-2013:1409
    MD5: 8cac2fe6c492f5c0498a7e8c769dbf6e
SHA-256: e5dd09780271b3064b12bf93dc83b2c6643a64a76d63832d4b2535094c876596
 
s390x:
xinetd-2.3.14-19.el5.s390x.rpm
File outdated by:  RHSA-2013:1409
    MD5: eaeb368415662bcfd07482fbbb7b4e16
SHA-256: 9410b92b4cfa2a3f5d0af5543dd9d3995797fab7b78620b6a0aab2485002ef2b
xinetd-debuginfo-2.3.14-19.el5.s390x.rpm
File outdated by:  RHSA-2013:1409
    MD5: a6019a63ce15a1c64e4afc1dbbf1037a
SHA-256: 90d4a4bd4227cf16b17b7310bfc69514b93cfd4dab1b00b8c864f4b9ee71c292
 
x86_64:
xinetd-2.3.14-19.el5.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 7ad4790326937460360dbec603cba7e9
SHA-256: 0316811271f15a11b42408f7a815e66800da6296393702de54f216a825348a45
xinetd-debuginfo-2.3.14-19.el5.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 179ebb7099cfa4160eda6252eb92a891
SHA-256: 7e3ce8242b0efbefbf749c1ed8e653f9ca11d8eab3212f6dc3506c55d8f4e0a8
 
Red Hat Enterprise Linux Desktop (v. 5 client)

SRPMS:
xinetd-2.3.14-19.el5.src.rpm
File outdated by:  RHSA-2013:1409
    MD5: 5e9d69bca71f6a93217d80b1307aec82
SHA-256: cf674fd772d65b1f4696b420a8da62f95fa971b04504d2c02aa71ee42772222e
 
IA-32:
xinetd-2.3.14-19.el5.i386.rpm
File outdated by:  RHSA-2013:1409
    MD5: 716c414de3dea266995c848aef347375
SHA-256: fe40a858efa7cc0920527b9f1bcb8396435abfe866bdbf5cf15757dc7ebe8a20
xinetd-debuginfo-2.3.14-19.el5.i386.rpm
File outdated by:  RHSA-2013:1409
    MD5: 0b57b69b68c994d05cd69aaa17a66a68
SHA-256: ddf166b1ae3c0ffe106a5a92364f0918d6f9ff6f216682f2d229fa53caf6a9f9
 
x86_64:
xinetd-2.3.14-19.el5.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 7ad4790326937460360dbec603cba7e9
SHA-256: 0316811271f15a11b42408f7a815e66800da6296393702de54f216a825348a45
xinetd-debuginfo-2.3.14-19.el5.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 179ebb7099cfa4160eda6252eb92a891
SHA-256: 7e3ce8242b0efbefbf749c1ed8e653f9ca11d8eab3212f6dc3506c55d8f4e0a8
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

790940 - CVE-2012-0862 xinetd: enables unintentional services over tcpmux port


References


Keywords

xinetd


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/