[Fwd: [RHSA-2002:196-09] Updated xinetd packages fix denial of service vulnerability]

From: Dan Rowles (d.rowlesat_private)
Date: Wed Dec 04 2002 - 05:43:29 PST

  • Next message: grazer@digit-labs.org: "Cobalt RaQ4 Remote root exploit" 

    On October 15th, Redhat sent a post to BugTraq advising users of Xinetd
to upgrade to 2.3.9-0.xx

Their latest post (3rd December) advises people to "upgrade" to
2.3.7-4.xx

Can anyone from RedHat please comment on what people who have already
got 2.3.9 installed should do from here? Do we need to force a
downgrade, or is 2.3.9 OK? If so, why the second update, and why has the
2.3.9 RPM disappeared from the mirrors?????

-- 
Dan Rowles
CTO
Outcome Technologies

_________________________________

t: +44 (0)207 656 2460
f: +44 (0)709 230 6588
m: +44 (0)798 076 8143
e: rowlesdat_private
w: http://www.outcometechnologies.com
BUPA House
15-19 Bloomsbury Way
London WC1A 2BA
_________________________________

***This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they are
addressed. If you receive this message in error, please return it to the
sender.***

    attached mail follows:

    --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated xinetd packages fix denial of service vulnerability Advisory ID: RHSA-2002:196-09 Issue date: 2002-09-06 Updated on: 2002-10-14 Product: Red Hat Linux Keywords: xinetd file descriptor leak Cross references: Obsoletes: CVE Names: CAN-2002-0871 --------------------------------------------------------------------- 1. Topic: Xinetd contains a denial-of-service (DoS) vulnerability. 2. Relevant releases/architectures: Red Hat Linux 7.0 - alpha, i386 Red Hat Linux 7.1 - alpha, i386, ia64 Red Hat Linux 7.2 - i386, ia64 Red Hat Linux 7.3 - i386 3. Problem description: Xinetd is a secure replacement for inetd, the Internet services daemon. Versions 2.3.4 through 2.3.7 of Xinetd 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. 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 containing xinetd version 2.3.9 which is not vulnerable to this issue. This issue was discovered by Solar Designer. 4. 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. 5. RPMs required: Red Hat Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/xinetd-2.3.9-0.70.src.rpm alpha: ftp://updates.redhat.com/7.0/en/os/alpha/xinetd-2.3.9-0.70.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/xinetd-2.3.9-0.70.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/xinetd-2.3.9-0.71.src.rpm alpha: ftp://updates.redhat.com/7.1/en/os/alpha/xinetd-2.3.9-0.71.alpha.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/xinetd-2.3.9-0.71.i386.rpm ia64: ftp://updates.redhat.com/7.1/en/os/ia64/xinetd-2.3.9-0.71.ia64.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/xinetd-2.3.9-0.72.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/xinetd-2.3.9-0.72.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/xinetd-2.3.9-0.72.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/xinetd-2.3.9-0.73.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/xinetd-2.3.9-0.73.i386.rpm 6. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 8c6ac9eda0398dcd94bca0381ac03026 7.0/en/os/SRPMS/xinetd-2.3.9-0.70.src.rpm eba55ee2c7f1008f216a520044ccb15d 7.0/en/os/alpha/xinetd-2.3.9-0.70.alpha.rpm 68c73e5047b4038147cc93db1d2a3585 7.0/en/os/i386/xinetd-2.3.9-0.70.i386.rpm 621d5914e49a9ad6b61fc185c194de62 7.1/en/os/SRPMS/xinetd-2.3.9-0.71.src.rpm 36b905178ce4485f17a5bf5851f4f867 7.1/en/os/alpha/xinetd-2.3.9-0.71.alpha.rpm c8b4f5b662351972f1502c929154925c 7.1/en/os/i386/xinetd-2.3.9-0.71.i386.rpm e26bdae93d1adcb72bb73c5e9d79d3f0 7.1/en/os/ia64/xinetd-2.3.9-0.71.ia64.rpm a3e5cbc60ca4ca0c5396d77e179adef5 7.2/en/os/SRPMS/xinetd-2.3.9-0.72.src.rpm f1bc1eefa580f873011821d0b50da5d6 7.2/en/os/i386/xinetd-2.3.9-0.72.i386.rpm 3051f3f4b9b6df880e3e8bc101fa36b9 7.2/en/os/ia64/xinetd-2.3.9-0.72.ia64.rpm a791cd356503d853ca867f3e73f1080a 7.3/en/os/SRPMS/xinetd-2.3.9-0.73.src.rpm ef5508fb220839e60e21840a565972cc 7.3/en/os/i386/xinetd-2.3.9-0.73.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/about/contact/pgpkey.html You can verify each package with the following command: rpm --checksig <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg <filename> 7. References: http://www.xinetd.org/ http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0871 Copyright(c) 2000, 2001, 2002 Red Hat, Inc.

    attached mail follows:

    --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated xinetd packages fix denial of service vulnerability Advisory ID: RHSA-2002:196-19 Issue date: 2002-09-06 Updated on: 2002-12-02 Product: Red Hat Linux Keywords: xinetd file descriptor leak flaw:dos-release Cross references: Obsoletes: CVE Names: CAN-2002-0871 --------------------------------------------------------------------- 1. Topic: 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. 2. Relevant releases/architectures: Red Hat Linux 7.0 - i386, alpha Red Hat Linux 7.1 - i386, alpha, ia64 Red Hat Linux 7.2 - i386, ia64 Red Hat Linux 7.3 - i386 Red Hat Linux 8.0 - i386 3. Problem description: 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. 4. 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. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 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" 6. RPMs required: Red Hat Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm alpha: ftp://updates.redhat.com/7.0/en/os/alpha/xinetd-2.3.7-4.7x.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm alpha: ftp://updates.redhat.com/7.1/en/os/alpha/xinetd-2.3.7-4.7x.alpha.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm ia64: ftp://updates.redhat.com/7.1/en/os/ia64/xinetd-2.3.7-4.7x.ia64.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/xinetd-2.3.7-4.7x.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm Red Hat Linux 8.0: SRPMS: ftp://updates.redhat.com/8.0/en/os/SRPMS/xinetd-2.3.7-5.src.rpm i386: ftp://updates.redhat.com/8.0/en/os/i386/xinetd-2.3.7-5.i386.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 38b5f218a384a7ba7cdc0168e2d5f892 7.0/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm ee9c54046762e1b3aa53d66da927f9ce 7.0/en/os/alpha/xinetd-2.3.7-4.7x.alpha.rpm b4d37fb0fda2fa6606befda4cbd7d458 7.0/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm 38b5f218a384a7ba7cdc0168e2d5f892 7.1/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm ee9c54046762e1b3aa53d66da927f9ce 7.1/en/os/alpha/xinetd-2.3.7-4.7x.alpha.rpm b4d37fb0fda2fa6606befda4cbd7d458 7.1/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm 569ae16839959297a167bf29e1fb5293 7.1/en/os/ia64/xinetd-2.3.7-4.7x.ia64.rpm 38b5f218a384a7ba7cdc0168e2d5f892 7.2/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm b4d37fb0fda2fa6606befda4cbd7d458 7.2/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm 569ae16839959297a167bf29e1fb5293 7.2/en/os/ia64/xinetd-2.3.7-4.7x.ia64.rpm 38b5f218a384a7ba7cdc0168e2d5f892 7.3/en/os/SRPMS/xinetd-2.3.7-4.7x.src.rpm b4d37fb0fda2fa6606befda4cbd7d458 7.3/en/os/i386/xinetd-2.3.7-4.7x.i386.rpm 07c7f1cedf7b9a20bad65815765d4ff2 8.0/en/os/SRPMS/xinetd-2.3.7-5.src.rpm 26e6f6faec33503f3538a4ac80c82ce2 8.0/en/os/i386/xinetd-2.3.7-5.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at http://www.redhat.com/about/contact/pgpkey.html You can verify each package with the following command: rpm --checksig -v <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum <filename> 8. References: http://www.xinetd.org/ http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0871 9. Contact: The Red Hat security contact is <securityat_private>. More contact details at http://www.redhat.com/solutions/security/news/contact.html Copyright(c) 2000, 2001, 2002 Red Hat, Inc.

    This archive was generated by hypermail 2b30 : Thu Dec 05 2002 - 13:51:06 PST