I’ve re read your first message, you as for “Jenkins CLI over SSH”, there you cannot do anything until we replace the ssh-module. The module will support those MACs and is not posible to disable them. However, I doubt that the Jenkins CLI use those MACs , and you can always use HTTPS.
El El mié, 10 feb 2021 a las 18:28, Eric Fetzer <[email protected]> escribió: > My MACs line says: > > MACs hmac-ripemd160,hmac-sha2-256,hmac-sha2-512,[email protected] > > I believe this is hardened, isn't it? > > Thanks, > Eric > > On Wed, Feb 10, 2021 at 9:40 AM kuisathaverat <[email protected]> > wrote: > >> hmac-* are Message authentication code algorithms (MACs), so you have to >> configure your Message authentication code algorithms (MACs) supported, for >> example >> >> MACs hmac-sha2-256,hmac-sha2-512 >> >> see >> https://www.ssh.com/ssh/sshd_config/#common-configuration-changes-for-the-enterprise >> >> El mié, 10 feb 2021 a las 17:24, Eric Fetzer (<[email protected]>) >> escribió: >> >>> Hmmm, I already hardened by that link: >>> https://www.ssh.com/ssh/sshd_config >>> >>> My /etc/ssh/sshd_config has: >>> >>> Ciphers aes128-ctr,aes192-ctr,aes256-ctr >>> >>> This is still showing up on my security scan though. Am I missing >>> something? >>> >>> Thanks, >>> Eric >>> >>> On Tue, Feb 9, 2021 at 12:23 PM kuisathaverat <[email protected]> >>> wrote: >>> >>>> There is work in progress to bump the version of the library and >>>> convert the sshd-module in a plugin to resolve this kind of issues quickly. >>>> For the moment you can configure your sshd servers on the Agents side to do >>>> not allow weak ciphers, see https://www.ssh.com/ssh/sshd_config. >>>> >>>> https://github.com/jenkinsci/sshd-module/pull/37 >>>> https://github.com/jenkinsci/sshd-module/pull/38 >>>> >>>> >>>> El mar, 9 feb 2021 a las 17:19, [email protected] (< >>>> [email protected]>) escribió: >>>> >>>>> I'm sorry, I just saw the last comment on here and, once again, this >>>>> showed up on our vulnerability report. I don't get exactly what I need to >>>>> do in order to fix this. Can someone lay it out for me please? Thanks - >>>>> Eric >>>>> >>>>> On Wednesday, August 26, 2020 at 12:39:40 PM UTC-6 [email protected] >>>>> wrote: >>>>> >>>>>> I was wrong you cannot configure the ciphers for the ssh server on >>>>>> the Java security files. The SSH server on Jenkins uses the >>>>>> https://github.com/apache/mina-sshd , IIRC the Jenkins >>>>>> implementation of the ssh server not read the sshd_config files so it is >>>>>> not posible to configure the ssh server. Apache mina has deprecated and >>>>>> disable those algorithms on 2.6.0 >>>>>> https://issues.apache.org/jira/browse/SSHD-1004, the sshd-module and >>>>>> CLI are using 1.7.0 >>>>>> https://github.com/jenkinsci/sshd-module/blob/master/pom.xml#L42 and >>>>>> https://github.com/jenkinsci/jenkins/blob/master/cli/pom.xml#L77 So >>>>>> I guess both should bump the dependency to remove support for weak >>>>>> algorithms >>>>>> >>>>>> >>>>>> El miércoles, 26 de agosto de 2020 a las 16:06:22 UTC+2, >>>>>> [email protected] escribió: >>>>>> >>>>>>> I think I found the solution to this: >>>>>>> >>>>>>> >>>>>>> https://www.thegeekdiary.com/how-to-disable-md5-based-hmac-algorithms-for-ssh/ >>>>>>> >>>>>>> >>>>>>> On Tuesday, August 25, 2020 at 1:59:49 PM UTC-6 [email protected] >>>>>>> wrote: >>>>>>> >>>>>>>> I'm confused. It doesn't look like the ciphers the vulnerability >>>>>>>> is citing are allowed in the java.security file on this system. We're >>>>>>>> getting flagged for: >>>>>>>> >>>>>>>> hmac-md5 >>>>>>>> hmac-md5-96 >>>>>>>> hmac-sha1-96 >>>>>>>> >>>>>>>> Settings are: >>>>>>>> >>>>>>>> jdk.tls.disabledAlgorithms=SSLv3, RC4, DES, MD5withRSA, DH keySize >>>>>>>> < 1024, \ >>>>>>>> EC keySize < 224, 3DES_EDE_CBC, anon, NULL >>>>>>>> >>>>>>>> Am I missing this, not a java security expert by any means... >>>>>>>> Thanks! >>>>>>>> On Monday, August 24, 2020 at 11:09:43 AM UTC-6 [email protected] >>>>>>>> wrote: >>>>>>>> >>>>>>>>> Yes, configuring the ciphers accepted by your JDK edit the >>>>>>>>> file lib\security\java.security (the path will vary based on your Java >>>>>>>>> version) >>>>>>>>> >>>>>>>>> El lunes, 24 de agosto de 2020 a las 16:48:22 UTC+2, >>>>>>>>> [email protected] escribió: >>>>>>>>> >>>>>>>>>> Hi all! I'm getting hit by my secuity team for a vulnerability >>>>>>>>>> for the Jenkins CLI via ssh allowing the following weak ciphers: >>>>>>>>>> >>>>>>>>>> hmac-md5 >>>>>>>>>> hmac-md5-96 >>>>>>>>>> hmac-sha1-96 >>>>>>>>>> >>>>>>>>>> Is there a way to configure ciphers accepted for the Jenkins CLI? >>>>>>>>>> >>>>>>>>>> Thanks, >>>>>>>>>> Eric >>>>>>>>>> >>>>>>>>> -- >>>>> You received this message because you are subscribed to a topic in the >>>>> Google Groups "Jenkins Users" group. >>>>> To unsubscribe from this topic, visit >>>>> https://groups.google.com/d/topic/jenkinsci-users/f84HCfhF4vY/unsubscribe >>>>> . >>>>> To unsubscribe from this group and all its topics, send an email to >>>>> [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/jenkinsci-users/07db750a-9c00-40ee-bc68-0a2b051c48fdn%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/jenkinsci-users/07db750a-9c00-40ee-bc68-0a2b051c48fdn%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> >>>> >>>> -- >>>> Un Saludo >>>> Iván Fernández Calvo >>>> https://www.linkedin.com/in/iv%C3%A1n-fern%C3%A1ndez-calvo-21425033 >>>> >>>> -- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "Jenkins Users" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/jenkinsci-users/f84HCfhF4vY/unsubscribe >>>> . >>>> To unsubscribe from this group and all its topics, send an email to >>>> [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/jenkinsci-users/CAKo5QrruVhwNoAi_XfMoFmHf_iwg-wPVBM%2BiwyRajRuyvmrbeQ%40mail.gmail.com >>>> <https://groups.google.com/d/msgid/jenkinsci-users/CAKo5QrruVhwNoAi_XfMoFmHf_iwg-wPVBM%2BiwyRajRuyvmrbeQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "Jenkins Users" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/jenkinsci-users/f84HCfhF4vY/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/jenkinsci-users/CAByBicY8swNixDjYvy0_VkiRWZKs_wrw6QFm0jxOVFR1rEx%3DKw%40mail.gmail.com >>> <https://groups.google.com/d/msgid/jenkinsci-users/CAByBicY8swNixDjYvy0_VkiRWZKs_wrw6QFm0jxOVFR1rEx%3DKw%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> >> >> -- >> Un Saludo >> Iván Fernández Calvo >> https://www.linkedin.com/in/iv%C3%A1n-fern%C3%A1ndez-calvo-21425033 >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "Jenkins Users" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/jenkinsci-users/f84HCfhF4vY/unsubscribe >> . >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/jenkinsci-users/CAKo5Qrr8WB8JO%3DB-1ZWiOFDi0eGA%2BDftezyF21LG9hpAHLB_0Q%40mail.gmail.com >> <https://groups.google.com/d/msgid/jenkinsci-users/CAKo5Qrr8WB8JO%3DB-1ZWiOFDi0eGA%2BDftezyF21LG9hpAHLB_0Q%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "Jenkins Users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/jenkinsci-users/f84HCfhF4vY/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jenkinsci-users/CAByBicbBQcu0aT7-L74otHM8qqSU-EAYpoV71n7hJOujqFRWqQ%40mail.gmail.com > <https://groups.google.com/d/msgid/jenkinsci-users/CAByBicbBQcu0aT7-L74otHM8qqSU-EAYpoV71n7hJOujqFRWqQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- Un Saludo Iván Fernández Calvo https://www.linkedin.com/in/iv%C3%A1n-fern%C3%A1ndez-calvo-21425033 -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. 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