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at "client config", mention clients should explicitly be configured with the most secure authentication mechanism supported

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to prevent authentication mechanism downgrade attacks by MitM.
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Mechiel Lukkien 2024-01-09 10:50:42 +01:00
parent 2392f79aa9
commit dda0a4ced1
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3 changed files with 9 additions and 2 deletions
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7
main.go
View file

@ -528,6 +528,13 @@ func printClientConfig(d dns.Domain) {
for _, e := range cc.Entries {
fmt.Printf("%-20s %-30s %5d %-15s %s\n", e.Protocol, e.Host, e.Port, e.Listener, e.Note)
}
fmt.Printf(`
To prevent authentication mechanism downgrade attempts that may result in
clients sending plain text passwords to a MitM, clients should always be
explicitly configured with the most secure authentication mechanism supported,
the first of: SCRAM-SHA-256-PLUS, SCRAM-SHA-1-PLUS, SCRAM-SHA-256, SCRAM-SHA-1,
CRAM-MD5.
`)
}
func cmdConfigTest(c *cmd) {

2
webadmin/admin.js
View file

@ -1919,7 +1919,7 @@ const domain = async (d) => {
let fieldset;
let localpart;
let account;
dom._kids(page, crumbs(crumblink('Mox Admin', '#'), 'Domain ' + domainString(dnsdomain)), dom.ul(dom.li(dom.a('Required DNS records', attr.href('#domains/' + d + '/dnsrecords'))), dom.li(dom.a('Check current actual DNS records and domain configuration', attr.href('#domains/' + d + '/dnscheck')))), dom.br(), dom.h2('Client configuration'), dom.div('If autoconfig/autodiscover does not work with an email client, use the settings below for this domain. Authenticate with email address and password.'), dom.table(dom.thead(dom.tr(dom.th('Protocol'), dom.th('Host'), dom.th('Port'), dom.th('Listener'), dom.th('Note'))), dom.tbody((clientConfigs.Entries || []).map(e => dom.tr(dom.td(e.Protocol), dom.td(domainString(e.Host)), dom.td('' + e.Port), dom.td('' + e.Listener), dom.td('' + e.Note))))), dom.br(), dom.h2('DMARC aggregate reports summary'), renderDMARCSummaries(dmarcSummaries || []), dom.br(), dom.h2('TLS reports summary'), renderTLSRPTSummaries(tlsrptSummaries || []), dom.br(), dom.h2('Addresses'), dom.table(dom.thead(dom.tr(dom.th('Address'), dom.th('Account'), dom.th('Action'))), dom.tbody(Object.entries(localpartAccounts).map(t => dom.tr(dom.td(t[0] || '(catchall)'), dom.td(dom.a(t[1], attr.href('#accounts/' + t[1]))), dom.td(dom.clickbutton('Remove', async function click(e) {
dom._kids(page, crumbs(crumblink('Mox Admin', '#'), 'Domain ' + domainString(dnsdomain)), dom.ul(dom.li(dom.a('Required DNS records', attr.href('#domains/' + d + '/dnsrecords'))), dom.li(dom.a('Check current actual DNS records and domain configuration', attr.href('#domains/' + d + '/dnscheck')))), dom.br(), dom.h2('Client configuration'), dom.p('If autoconfig/autodiscover does not work with an email client, use the settings below for this domain. Authenticate with email address and password. ', dom.span('Explicitly configure', attr.title('To prevent authentication mechanism downgrade attempts that may result in clients sending plain text passwords to a MitM.')), ' the first supported authentication mechanism: SCRAM-SHA-256-PLUS, SCRAM-SHA-1-PLUS, SCRAM-SHA-256, SCRAM-SHA-1, CRAM-MD5.'), dom.table(dom.thead(dom.tr(dom.th('Protocol'), dom.th('Host'), dom.th('Port'), dom.th('Listener'), dom.th('Note'))), dom.tbody((clientConfigs.Entries || []).map(e => dom.tr(dom.td(e.Protocol), dom.td(domainString(e.Host)), dom.td('' + e.Port), dom.td('' + e.Listener), dom.td('' + e.Note))))), dom.br(), dom.h2('DMARC aggregate reports summary'), renderDMARCSummaries(dmarcSummaries || []), dom.br(), dom.h2('TLS reports summary'), renderTLSRPTSummaries(tlsrptSummaries || []), dom.br(), dom.h2('Addresses'), dom.table(dom.thead(dom.tr(dom.th('Address'), dom.th('Account'), dom.th('Action'))), dom.tbody(Object.entries(localpartAccounts).map(t => dom.tr(dom.td(t[0] || '(catchall)'), dom.td(dom.a(t[1], attr.href('#accounts/' + t[1]))), dom.td(dom.clickbutton('Remove', async function click(e) {
e.preventDefault();
if (!window.confirm('Are you sure you want to remove this address?')) {
return;

2
webadmin/admin.ts
View file

@ -852,7 +852,7 @@ const domain = async (d: string) => {
),
dom.br(),
dom.h2('Client configuration'),
dom.div('If autoconfig/autodiscover does not work with an email client, use the settings below for this domain. Authenticate with email address and password.'),
dom.p('If autoconfig/autodiscover does not work with an email client, use the settings below for this domain. Authenticate with email address and password. ', dom.span('Explicitly configure', attr.title('To prevent authentication mechanism downgrade attempts that may result in clients sending plain text passwords to a MitM.')), ' the first supported authentication mechanism: SCRAM-SHA-256-PLUS, SCRAM-SHA-1-PLUS, SCRAM-SHA-256, SCRAM-SHA-1, CRAM-MD5.'),
dom.table(
dom.thead(
dom.tr(