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Security Advisory Updated xinetd packages fix denial of service vulnerability

Advisory: RHSA-2002:196-19
Type: Security Advisory
Severity: N/A
Issued on: 2002-09-06
Last updated on: 2002-12-02
Affected Products: Red Hat Linux 7.0
Red Hat Linux 7.1
Red Hat Linux 7.2
Red Hat Linux 7.3
Red Hat Linux 8.0
CVEs (cve.mitre.org): CVE-2002-0871

Details

Xinetd contains a denial-of-service (DoS) vulnerability.

UPDATE 2002-12-02: Updated packages are available to fix issues encountered
with the previous errata packages.

Xinetd is a secure replacement for inetd, the Internet services daemon.

Versions of Xinetd prior to 2.3.7 leak file descriptors for the signal
pipe to services that are launched by xinetd. This could allow an attacker
to execute a DoS attack via the pipe. The Common Vulnerabilities and
Exposures project has assigned the name CAN-2002-0871 to this issue.

Red Hat Linux 7.3 shipped with xinetd version 2.3.4 and is therefore
vulnerable to this issue. All users are advised to upgrade to the errata
packages which fix the vulnerability.

Thanks to Solar Designer for discovering this issue.


Solution

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Updated packages

Red Hat Linux 7.0

SRPMS:
xinetd-2.3.7-4.7x.src.rpm
File outdated by:  RHSA-2003:160
    MD5: 38b5f218a384a7ba7cdc0168e2d5f892
 
Alpha:
ftp://updates.redhat.com/rhn/repository/NULL/xinetd/2.3.7-4.7x/alpha/xinetd-2.3.7-4.7x.alpha.rpm
Missing file
    MD5: ee9c54046762e1b3aa53d66da927f9ce
 
IA-32:
ftp://updates.redhat.com/rhn/repository/NULL/xinetd/2.3.7-4.7x/i386/xinetd-2.3.7-4.7x.i386.rpm
Missing file
    MD5: b4d37fb0fda2fa6606befda4cbd7d458
 
Red Hat Linux 7.1

SRPMS:
xinetd-2.3.7-4.7x.src.rpm
File outdated by:  RHSA-2003:160
    MD5: 38b5f218a384a7ba7cdc0168e2d5f892
 
Alpha:
ftp://updates.redhat.com/rhn/repository/NULL/xinetd/2.3.7-4.7x/alpha/xinetd-2.3.7-4.7x.alpha.rpm
Missing file
    MD5: ee9c54046762e1b3aa53d66da927f9ce
 
IA-32:
xinetd-2.3.7-4.7x.i386.rpm
File outdated by:  RHSA-2003:160
    MD5: b4d37fb0fda2fa6606befda4cbd7d458
 
IA-64:
ftp://updates.redhat.com/rhn/repository/NULL/xinetd/2.3.7-4.7x/ia64/xinetd-2.3.7-4.7x.ia64.rpm
Missing file
    MD5: 569ae16839959297a167bf29e1fb5293
 
Red Hat Linux 7.2

SRPMS:
xinetd-2.3.7-4.7x.src.rpm
File outdated by:  RHSA-2003:160
    MD5: 38b5f218a384a7ba7cdc0168e2d5f892
 
IA-32:
xinetd-2.3.7-4.7x.i386.rpm
File outdated by:  RHSA-2003:160
    MD5: b4d37fb0fda2fa6606befda4cbd7d458
 
IA-64:
xinetd-2.3.7-4.7x.ia64.rpm
File outdated by:  RHSA-2003:160
    MD5: 569ae16839959297a167bf29e1fb5293
 
Red Hat Linux 7.3

SRPMS:
xinetd-2.3.7-4.7x.src.rpm
File outdated by:  RHSA-2003:160
    MD5: 38b5f218a384a7ba7cdc0168e2d5f892
 
IA-32:
xinetd-2.3.7-4.7x.i386.rpm
File outdated by:  RHSA-2003:160
    MD5: b4d37fb0fda2fa6606befda4cbd7d458
 
Red Hat Linux 8.0

SRPMS:
xinetd-2.3.7-5.src.rpm
File outdated by:  RHSA-2003:160
    MD5: 07c7f1cedf7b9a20bad65815765d4ff2
 
IA-32:
xinetd-2.3.7-5.i386.rpm
File outdated by:  RHSA-2003:160
    MD5: 26e6f6faec33503f3538a4ac80c82ce2
 

Bugs fixed (see bugzilla for more information)

74696 - Broken tcp_wrappers support
76146 - xinetd 2.3.9 causes hanging CLOSE_WAIT connections
77781 - xinetd stop serving the services because "Too many open files"


References


Keywords

descriptor, file, flaw:dos-release, leak, xinetd


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