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openSUSE:Leap:15.3:Update
dovecot23.24957
CVE-2022-30550.patch
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File CVE-2022-30550.patch of Package dovecot23.24957
From 7bad6a24160e34bce8f10e73dbbf9e5fbbcd1904 Mon Sep 17 00:00:00 2001 From: Timo Sirainen <timo.sirainen@open-xchange.com> Date: Mon, 9 May 2022 15:23:33 +0300 Subject: [PATCH 1/2] auth: Fix handling passdbs with identical driver/args but different mechanisms/username_filter The passdb was wrongly deduplicated in this situation, causing wrong mechanisms or username_filter setting to be used. This would be a rather unlikely configuration though. Fixed by moving mechanisms and username_filter from struct passdb_module to struct auth_passdb, which is where they should have been in the first place. --- src/auth/auth-request.c | 6 +++--- src/auth/auth.c | 18 ++++++++++++++++++ src/auth/auth.h | 5 +++++ src/auth/passdb.c | 15 ++------------- src/auth/passdb.h | 4 ---- 5 files changed, 28 insertions(+), 20 deletions(-) diff --git a/src/auth/auth-request.c b/src/auth/auth-request.c index cd08b1fa02..0ca29f3674 100644 --- a/src/auth/auth-request.c +++ b/src/auth/auth-request.c @@ -534,8 +534,8 @@ auth_request_want_skip_passdb(struct auth_request *request, struct auth_passdb *passdb) { /* if mechanism is not supported, skip */ - const char *const *mechs = passdb->passdb->mechanisms; - const char *const *username_filter = passdb->passdb->username_filter; + const char *const *mechs = passdb->mechanisms; + const char *const *username_filter = passdb->username_filter; const char *username; username = request->fields.user; @@ -548,7 +548,7 @@ auth_request_want_skip_passdb(struct auth_request *request, return TRUE; } - if (passdb->passdb->username_filter != NULL && + if (passdb->username_filter != NULL && !auth_request_username_accepted(username_filter, username)) { auth_request_log_debug(request, request->mech != NULL ? AUTH_SUBSYS_MECH diff --git a/src/auth/auth.c b/src/auth/auth.c index f2f3fda20c..9f6c4ba60c 100644 --- a/src/auth/auth.c +++ b/src/auth/auth.c @@ -99,6 +99,24 @@ auth_passdb_preinit(struct auth *auth, const struct auth_passdb_settings *set, auth_passdb->override_fields_tmpl = passdb_template_build(auth->pool, set->override_fields); + if (*set->mechanisms == '\0') { + auth_passdb->mechanisms = NULL; + } else if (strcasecmp(set->mechanisms, "none") == 0) { + auth_passdb->mechanisms = (const char *const[]){ NULL }; + } else { + auth_passdb->mechanisms = + (const char *const *)p_strsplit_spaces(auth->pool, + set->mechanisms, " ,"); + } + + if (*set->username_filter == '\0') { + auth_passdb->username_filter = NULL; + } else { + auth_passdb->username_filter = + (const char *const *)p_strsplit_spaces(auth->pool, + set->username_filter, " ,"); + } + /* for backwards compatibility: */ if (set->pass) auth_passdb->result_success = AUTH_DB_RULE_CONTINUE; diff --git a/src/auth/auth.h b/src/auth/auth.h index f700e29d5c..460a179765 100644 --- a/src/auth/auth.h +++ b/src/auth/auth.h @@ -41,6 +41,11 @@ struct auth_passdb { struct passdb_template *default_fields_tmpl; struct passdb_template *override_fields_tmpl; + /* Supported authentication mechanisms, NULL is all, {NULL} is none */ + const char *const *mechanisms; + /* Username filter, NULL is no filter */ + const char *const *username_filter; + enum auth_passdb_skip skip; enum auth_db_rule result_success; enum auth_db_rule result_failure; diff --git a/src/auth/passdb.c b/src/auth/passdb.c index eb4ac8ae82..f5eed1af4f 100644 --- a/src/auth/passdb.c +++ b/src/auth/passdb.c @@ -224,19 +224,8 @@ passdb_preinit(pool_t pool, const struct auth_passdb_settings *set) passdb->id = ++auth_passdb_id; passdb->iface = *iface; passdb->args = p_strdup(pool, set->args); - if (*set->mechanisms == '\0') { - passdb->mechanisms = NULL; - } else if (strcasecmp(set->mechanisms, "none") == 0) { - passdb->mechanisms = (const char *const[]){NULL}; - } else { - passdb->mechanisms = (const char* const*)p_strsplit_spaces(pool, set->mechanisms, " ,"); - } - - if (*set->username_filter == '\0') { - passdb->username_filter = NULL; - } else { - passdb->username_filter = (const char* const*)p_strsplit_spaces(pool, set->username_filter, " ,"); - } + /* NOTE: if anything else than driver & args are added here, + passdb_find() also needs to be updated. */ array_push_back(&passdb_modules, &passdb); return passdb; } diff --git a/src/auth/passdb.h b/src/auth/passdb.h index 2e95328e5c..e466a9fdb6 100644 --- a/src/auth/passdb.h +++ b/src/auth/passdb.h @@ -63,10 +63,6 @@ struct passdb_module { /* Default password scheme for this module. If default_cache_key is set, must not be NULL. */ const char *default_pass_scheme; - /* Supported authentication mechanisms, NULL is all, [NULL] is none*/ - const char *const *mechanisms; - /* Username filter, NULL is no filter */ - const char *const *username_filter; /* If blocking is set to TRUE, use child processes to access this passdb. */ From a1022072e2ce36f853873d910287f466165b184b Mon Sep 17 00:00:00 2001 From: Timo Sirainen <timo.sirainen@open-xchange.com> Date: Mon, 16 May 2022 14:58:45 +0200 Subject: [PATCH 2/2] auth: Add a comment about updating userdb_find() --- src/auth/userdb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/auth/userdb.c b/src/auth/userdb.c index 0849659102..830bc2dd64 100644 --- a/src/auth/userdb.c +++ b/src/auth/userdb.c @@ -158,7 +158,8 @@ userdb_preinit(pool_t pool, const struct auth_userdb_settings *set) userdb->id = ++auth_userdb_id; userdb->iface = iface; userdb->args = p_strdup(pool, set->args); - + /* NOTE: if anything else than driver & args are added here, + userdb_find() also needs to be updated. */ array_push_back(&userdb_modules, &userdb); return userdb; }
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