文書番号: 000222081
root@nwserver:~# cat /etc/redhat-release Red Hat Enterprise Linux release 8.9 (Ootpa)
root@nwserver:~# mailx -s "test email" backupadmin@domain.com < /dev/null Null message body; hope that's ok root@nwserver:~# tail -n 7 /var/log/maillog Feb 14 16:13:49 nwserver sendmail[24024]: 41ELDnaE024024: from=root, size=229, class=0, nrcpts=1, msgid=<202402142113.41ELDnaE024024@nwserver.amer.lan>, relay=root@localhost Feb 14 16:13:49 nwserver sendmail[24024]: STARTTLS=client, relay=[127.0.0.1], version=TLSv1.3, verify=FAIL, cipher=TLS_AES_256_GCM_SHA384, bits=256/256 Feb 14 16:13:49 nwserver sendmail[24025]: STARTTLS=server, relay=localhost [127.0.0.1], version=TLSv1.3, verify=NOT, cipher=TLS_AES_256_GCM_SHA384, bits=256/256 Feb 14 16:13:49 nwserver sendmail[24025]: 41ELDn4l024025: from=<root@nwserver.amer.lan>, size=490, class=0, nrcpts=1, msgid=<202402142113.41ELDnaE024024@nwserver.amer.lan>, proto=ESMTPS, daemon=MTA, relay=localhost [127.0.0.1] Feb 14 16:13:49 nwserver sendmail[24024]: 41ELDnaE024024: to=backupadmin@domain.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30229, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (41ELDn4l024025 Message accepted for delivery) Feb 14 16:13:50 nwserver sendmail[24027]: STARTTLS=client, relay=mailhub.domain.com., version=TLSv1.2, verify=OK, cipher=ECDHE-RSA-AES256-GCM-SHA384, bits=256/256 Feb 14 16:13:50 nwserver sendmail[24027]: 41ELDn4l024025: to=<backupadmin@domain.com>, ctladdr=<root@nwserver.amer.lan> (0/0), delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=120490, relay=mailhub.domain.com. [10.10.10.10], dsn=2.0.0, stat=Sent (ok: Message 225328373 accepted)
root@nwserver:~# nsr_render_log /nsr/logs/policy/Server\ Protection/workflow_Server\ backup_064001.raw
133550 02/14/2024 11:01:35 AM 1 0 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow NSR notice Starting Protection Policy 'Server Protection' workflow 'Server backup'.
199800 02/14/2024 11:01:35 AM 1 5 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow NSR notice Consider starting action 'Server db backup', enabled 1, schedule action '1'
204318 02/14/2024 11:01:35 AM 1 1 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow SYSTEM notice Request to run the enabled action 'Server db backup' that has level configured as '1'.
201496 02/14/2024 11:01:35 AM 1 1 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow SYSTEM notice Starting the scheduled action 'Server db backup'.
123316 02/14/2024 11:01:35 AM 1 0 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow NSR notice Starting action 'Server Protection/Server backup/Server db backup' with command: 'nsrdbsave -l 1'.
123321 02/14/2024 11:01:35 AM 1 0 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow NSR notice Action 'Server Protection/Server backup/Server db backup's log will be in '/nsr/logs/policy/Server Protection/Server backup/Server db backup_064002.raw'.
123325 02/14/2024 11:02:25 AM 1 0 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow NSR notice Action 'Server Protection/Server backup/Server db backup' succeeded.
199800 02/14/2024 11:02:25 AM 1 5 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow NSR notice Consider starting action 'Expiration', enabled 1, schedule action 'exec'
204318 02/14/2024 11:02:25 AM 1 1 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow SYSTEM notice Request to run the enabled action 'Expiration' that has level configured as 'exec'.
201496 02/14/2024 11:02:25 AM 1 1 0 3269973824 446260 0 nwserver.amer.lan nsrworkflow SYSTEM notice Starting the scheduled action 'Expiration'.
5 02/14/2024 11:02:25 AM 1 1 0 0 unknown unknown LOG unrendered /bin/mailx: symbol lookup error: /bin/mailx: undefined symbol: SSLv3_client_method, version OPENSSL_1_1_0
NetWorker : Comment utiliser nsr_render_log.
L’une des améliorations apportées à NetWorker 19.10 concernait SSL. NetWorker fournit sa propre bibliothèque SSL qui est exportée dans le fichier networkerrc
lime:
root@nwserver:~# cat /opt/nsr/admin/networkerrc | grep "NSR_LIBS\|LD_LIBRARY_PATH" NSR_LIBS=/usr/lib/nsr NSR_LIBS=/usr/lib/nsr/lib64 # It must be the first entry of LD_LIBRARY_PATH otherwise it fails to load libraries. NSR_LIBS=/usr/lib/nsr/lib64/cst:/usr/lib/nsr/lib64 LD_LIBRARY_PATH=${NSR_LIBS}:$LD_LIBRARY_PATH export LD_LIBRARY_PATH
La version de mail sur Red Hat 8.x inclut une bibliothèque SSL qui inclut SSv3 :
root@nwserver:~# ldd /bin/mail | grep ssl libssl.so.1.1 => /lib64/libssl.so.1.1 (0x00007f116357b000) root@lnx-client02:~# nm -D /lib64/libssl.so.1.1 | egrep -i "SSLv3_" 0000000000022780 T SSLv3_client_method 0000000000022760 T SSLv3_method 0000000000022770 T SSLv3_server_method root@nwserver:~#
NetWorker 19.10 a supprimé SSLv3 de sa bibliothèque, car il s’agit d’une faille de sécurité potentielle exploitable :
root@nwserver:~# nm -D /usr/lib/nsr/lib64/libssl.so.1.1 | egrep -i "SSLv" root@nwserver:~#
Le colis utilise un ancien libssl
bibliothèque. Le problème vient du colis postal ; donc en dehors de NetWorker.
L’administrateur Exchange ou de messagerie peut examiner la configuration des serveurs de messagerie et vérifier si des options sont disponibles pour désactiver SSLv3 en faveur de TLS 1.2.
Un correctif pour ce problème doit être publié dans le package mail/mailx Linux. Le courrier doit être mis à jour pour inclure un libssl
qui n’utilise pas SSLv3. Au moment de la rédaction de cet article de la base de connaissances, le seul package de messagerie répertorié pour Red Hat 8.x est mailx-12.5-29.el8.x86_64 qui a été publié en 2019. Ce problème a un impact sur ce colis de messagerie.
Confirmez le package de messagerie installé :
rpm -qa | grep mail
root@nwserver:~# rpm -qa | grep mail
sendmail-8.15.2-34.el8.x86_64
mailcap-2.1.48-3.el8.noarch
mailx-12.5-29.el8.x86_64
procmail-3.22-47.el8.x86_64
Obtenez les détails du colis de messagerie en exécutant :
yum provides mail
root@nwserver:~# yum provides mail Updating Subscription Management repositories. Last metadata expiration check: 1:55:22 ago on Wed 21 Feb 2024 09:35:43 AM EST. mailx-12.5-29.el8.x86_64 : Enhanced implementation of the mailx command Repo : @System Matched from: Filename : /bin/mail mailx-12.5-29.el8.x86_64 : Enhanced implementation of the mailx command Repo : rhel-8-for-x86_64-baseos-rpms Matched from: Filename : /bin/mail
yum provides
Affiche une version plus récente, vous pouvez également essayer :
yum upgrade mailx
/opt/nsr/admin/networkerrc
pour contenir OS_LIBS=/lib64
linux86w)
# cst path is required to locate dynamic libraries of cst (also loads internal bsafe crypto libraries).
# It must be the first entry of LD_LIBRARY_PATH otherwise it fails to load libraries.
# cst comes with own bsafe library. cst bsafe library version may or may not be the same
# version of bsafe library used by other components in the product.
NSR_LIBS=/usr/lib/nsr/lib64/cst:/usr/lib/nsr/lib64
OS_LIBS=/lib64
ERLCOOKIE_HOME=/nsr/rabbitmq
:::::::
esac
LD_LIBRARY_PATH=${OS_LIBS}:${NSR_LIBS}:$LD_LIBRARY_PATH
2. Restart NetWorker:
systemctl restart networker
libssl
bibliothèque. Cette bibliothèque plus récente n’utilise pas SSLv3. Le problème n’est pas reproductible et aucune solution de contournement n’a été nécessaire avec NetWorker 19.10 sur Red Hat 9.x.
root@lnx-nwserv:~# ldd /usr/bin/mail
linux-vdso.so.1 (0x00007fffb211a000)
libssl.so.3 => /lib64/libssl.so.3 (0x00007fad91b73000)
libcrypto.so.3 => /lib64/libcrypto.so.3 (0x00007fad91600000)
libgssapi_krb5.so.2 => /lib64/libgssapi_krb5.so.2 (0x00007fad91b1c000)
libidn2.so.0 => /lib64/libidn2.so.0 (0x00007fad91afb000)
libtinfo.so.6 => /lib64/libtinfo.so.6 (0x00007fad91acb000)
libc.so.6 => /lib64/libc.so.6 (0x00007fad91200000)
libz.so.1 => /lib64/libz.so.1 (0x00007fad91aaf000)
libkrb5.so.3 => /lib64/libkrb5.so.3 (0x00007fad91525000)
libk5crypto.so.3 => /lib64/libk5crypto.so.3 (0x00007fad91a96000)
libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00007fad91a8f000)
libkrb5support.so.0 => /lib64/libkrb5support.so.0 (0x00007fad91a7e000)
libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00007fad91a77000)
libresolv.so.2 => /lib64/libresolv.so.2 (0x00007fad91a61000)
libunistring.so.2 => /lib64/libunistring.so.2 (0x00007fad9107b000)
/lib64/ld-linux-x86-64.so.2 (0x00007fad91d2e000)
libselinux.so.1 => /lib64/libselinux.so.1 (0x00007fad91a34000)
libpcre2-8.so.0 => /lib64/libpcre2-8.so.0 (0x00007fad91489000)
root@lnx-nwserv:~# nm -D /lib64/libssl.so.3 | egrep -i "SSLv3_"
root@lnx-nwserv:~#
NetWorker : Nsrworkflow NSR severe Impossible de stat file /usr/bin/mailNetWorker
NetWorker Family, NetWorker Series
23 7月 2024
9
Solution