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Security Advisory Low: xinetd security and bug fix update

Advisory: RHSA-2013:0499-2
Type: Security Advisory
Severity: Low
Issued on: 2013-02-21
Last updated on: 2013-02-21
Affected Products: Red Hat Enterprise Linux Desktop (v. 6)
Red Hat Enterprise Linux HPC Node (v. 6)
Red Hat Enterprise Linux Server (v. 6)
Red Hat Enterprise Linux Workstation (v. 6)
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 6.

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#790036)

* 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#809271)

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/knowledge/articles/11258

Updated packages

Red Hat Enterprise Linux Desktop (v. 6)

SRPMS:
xinetd-2.3.14-38.el6.src.rpm
File outdated by:  RHSA-2013:1409
    MD5: f8dd1b79fb249d52e35367d2eefa8918
SHA-256: e4ad00053f8f8756ab2771954dc5bc4fae54ba639f855f9d2e98410087e5b710
 
IA-32:
xinetd-2.3.14-38.el6.i686.rpm
File outdated by:  RHSA-2013:1409
    MD5: 2b8f826c7b0773c3aea42796b3ca0f0f
SHA-256: 392f4439a9a15eaa8f7b4f6afd5cd6295fb65ac46faf97f2d7a3bafc1523ef70
xinetd-debuginfo-2.3.14-38.el6.i686.rpm
File outdated by:  RHSA-2013:1409
    MD5: 8a25a5100d76b5bf611c8763a8cf99d0
SHA-256: 732a58d162184d8a5e564e5472da44fc309275cd1397d1f32b12bd055d94c0ac
 
x86_64:
xinetd-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 5cbb98f5aef485bde624f92c3f762bc7
SHA-256: 375c25bb4d6607a1ef166379a0350cdc6753f137901965503b0f1a8ab45ecde8
xinetd-debuginfo-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: b9d91c5bc5e16902085be1b66cb3278c
SHA-256: b0853df8e8cf60a732b205250ec998f43dbac26b015363dd40c87f37a26f932d
 
Red Hat Enterprise Linux HPC Node (v. 6)

SRPMS:
xinetd-2.3.14-38.el6.src.rpm
File outdated by:  RHSA-2013:1409
    MD5: f8dd1b79fb249d52e35367d2eefa8918
SHA-256: e4ad00053f8f8756ab2771954dc5bc4fae54ba639f855f9d2e98410087e5b710
 
x86_64:
xinetd-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 5cbb98f5aef485bde624f92c3f762bc7
SHA-256: 375c25bb4d6607a1ef166379a0350cdc6753f137901965503b0f1a8ab45ecde8
xinetd-debuginfo-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: b9d91c5bc5e16902085be1b66cb3278c
SHA-256: b0853df8e8cf60a732b205250ec998f43dbac26b015363dd40c87f37a26f932d
 
Red Hat Enterprise Linux Server (v. 6)

SRPMS:
xinetd-2.3.14-38.el6.src.rpm
File outdated by:  RHSA-2013:1409
    MD5: f8dd1b79fb249d52e35367d2eefa8918
SHA-256: e4ad00053f8f8756ab2771954dc5bc4fae54ba639f855f9d2e98410087e5b710
 
IA-32:
xinetd-2.3.14-38.el6.i686.rpm
File outdated by:  RHSA-2013:1409
    MD5: 2b8f826c7b0773c3aea42796b3ca0f0f
SHA-256: 392f4439a9a15eaa8f7b4f6afd5cd6295fb65ac46faf97f2d7a3bafc1523ef70
xinetd-debuginfo-2.3.14-38.el6.i686.rpm
File outdated by:  RHSA-2013:1409
    MD5: 8a25a5100d76b5bf611c8763a8cf99d0
SHA-256: 732a58d162184d8a5e564e5472da44fc309275cd1397d1f32b12bd055d94c0ac
 
PPC:
xinetd-2.3.14-38.el6.ppc64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 39cc016fa38866ab0c499da58dd326ff
SHA-256: 8ef86871771c2ad03097a0d10e0b518f5a95b66df92a977146e3f123ab80c71e
xinetd-debuginfo-2.3.14-38.el6.ppc64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 0c22b000903e19c0a46f4b3939cba502
SHA-256: aae3bfe4ef33df913bff8b40a50e1bcb533f7bd9771def7e9c99f90cc4616ed7
 
s390x:
xinetd-2.3.14-38.el6.s390x.rpm
File outdated by:  RHSA-2013:1409
    MD5: d44d464609ccd3ec8802af0ddc1cdd14
SHA-256: 276d8b0e42a31bdd0d4a8987e7150fda12aa40ab248770068ccbe7d40209ca44
xinetd-debuginfo-2.3.14-38.el6.s390x.rpm
File outdated by:  RHSA-2013:1409
    MD5: 03a04771d9cf385e4d6f1c3f8607ec19
SHA-256: 8ab1c7b686795b8d655cea68458bc59489cceb73ed760c6dfa4cf8f3227ca773
 
x86_64:
xinetd-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 5cbb98f5aef485bde624f92c3f762bc7
SHA-256: 375c25bb4d6607a1ef166379a0350cdc6753f137901965503b0f1a8ab45ecde8
xinetd-debuginfo-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: b9d91c5bc5e16902085be1b66cb3278c
SHA-256: b0853df8e8cf60a732b205250ec998f43dbac26b015363dd40c87f37a26f932d
 
Red Hat Enterprise Linux Workstation (v. 6)

SRPMS:
xinetd-2.3.14-38.el6.src.rpm
File outdated by:  RHSA-2013:1409
    MD5: f8dd1b79fb249d52e35367d2eefa8918
SHA-256: e4ad00053f8f8756ab2771954dc5bc4fae54ba639f855f9d2e98410087e5b710
 
IA-32:
xinetd-2.3.14-38.el6.i686.rpm
File outdated by:  RHSA-2013:1409
    MD5: 2b8f826c7b0773c3aea42796b3ca0f0f
SHA-256: 392f4439a9a15eaa8f7b4f6afd5cd6295fb65ac46faf97f2d7a3bafc1523ef70
xinetd-debuginfo-2.3.14-38.el6.i686.rpm
File outdated by:  RHSA-2013:1409
    MD5: 8a25a5100d76b5bf611c8763a8cf99d0
SHA-256: 732a58d162184d8a5e564e5472da44fc309275cd1397d1f32b12bd055d94c0ac
 
x86_64:
xinetd-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: 5cbb98f5aef485bde624f92c3f762bc7
SHA-256: 375c25bb4d6607a1ef166379a0350cdc6753f137901965503b0f1a8ab45ecde8
xinetd-debuginfo-2.3.14-38.el6.x86_64.rpm
File outdated by:  RHSA-2013:1409
    MD5: b9d91c5bc5e16902085be1b66cb3278c
SHA-256: b0853df8e8cf60a732b205250ec998f43dbac26b015363dd40c87f37a26f932d
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

790036 - xinetd leaking file descriptors
790940 - CVE-2012-0862 xinetd: enables unintentional services over tcpmux port


References



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/