An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed (3.x) or certain non-default sieve options are enabled (2.x), a user with a mail account on the service can use a sieve script containing a fileinto directive to create any mailbox with administrator privileges, because of folder mishandling in autosievecreatefolder() in imap/lmtpsieve.c.
{
"binaries": [
{
"binary_version": "2.5.10-3ubuntu1.1",
"binary_name": "cyrus-admin"
},
{
"binary_version": "2.5.10-3ubuntu1.1",
"binary_name": "cyrus-caldav"
},
{
"binary_version": "2.5.10-3ubuntu1.1",
"binary_name": "cyrus-clients"
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{
"binary_version": "2.5.10-3ubuntu1.1",
"binary_name": "cyrus-common"
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{
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"binary_name": "cyrus-dev"
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{
"binary_version": "2.5.10-3ubuntu1.1",
"binary_name": "cyrus-imapd"
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{
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"binary_name": "cyrus-murder"
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{
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"binary_name": "cyrus-nntpd"
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{
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"binary_name": "cyrus-pop3d"
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{
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],
"availability": "No subscription required"
}