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krb5-mini.2274
0105-Fix-leaks-in-kadmin-server-stubs-CVE-2015-...
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File 0105-Fix-leaks-in-kadmin-server-stubs-CVE-2015-8631.patch of Package krb5-mini.2274
From 83ed75feba32e46f736fcce0d96a0445f29b96c2 Mon Sep 17 00:00:00 2001 From: Greg Hudson <ghudson@mit.edu> Date: Fri, 8 Jan 2016 13:16:54 -0500 Subject: [PATCH] Fix leaks in kadmin server stubs [CVE-2015-8631] In each kadmind server stub, initialize the client_name and server_name variables, and release them in the cleanup handler. Many of the stubs will otherwise leak the client and server name if krb5_unparse_name() fails. Also make sure to free the prime_arg variables in rename_principal_2_svc(), or we can leak the first one if unparsing the second one fails. Discovered by Simo Sorce. CVE-2015-8631: In all versions of MIT krb5, an authenticated attacker can cause kadmind to leak memory by supplying a null principal name in a request which uses one. Repeating these requests will eventually cause kadmind to exhaust all available memory. CVSSv2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C/E:POC/RL:OF/RC:C ticket: 8343 (new) target_version: 1.14-next target_version: 1.13-next tags: pullup diff --git a/src/kadmin/server/server_stubs.c b/src/kadmin/server/server_stubs.c index 1879dc6..6ac797e 100644 --- a/src/kadmin/server/server_stubs.c +++ b/src/kadmin/server/server_stubs.c @@ -334,7 +334,8 @@ create_principal_2_svc(cprinc_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; restriction_t *rp; @@ -382,10 +383,10 @@ create_principal_2_svc(cprinc_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); - gss_release_buffer(&minor_stat, &client_name); - gss_release_buffer(&minor_stat, &service_name); exit_func: + gss_release_buffer(&minor_stat, &client_name); + gss_release_buffer(&minor_stat, &service_name); free_server_handle(handle); return &ret; } @@ -395,7 +396,8 @@ create_principal3_2_svc(cprinc3_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; restriction_t *rp; @@ -444,10 +446,10 @@ create_principal3_2_svc(cprinc3_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); - gss_release_buffer(&minor_stat, &client_name); - gss_release_buffer(&minor_stat, &service_name); exit_func: + gss_release_buffer(&minor_stat, &client_name); + gss_release_buffer(&minor_stat, &service_name); free_server_handle(handle); return &ret; } @@ -457,8 +459,8 @@ delete_principal_2_svc(dprinc_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -501,10 +503,10 @@ delete_principal_2_svc(dprinc_arg *arg, struct svc_req *rqstp) } free(prime_arg); - gss_release_buffer(&minor_stat, &client_name); - gss_release_buffer(&minor_stat, &service_name); exit_func: + gss_release_buffer(&minor_stat, &client_name); + gss_release_buffer(&minor_stat, &service_name); free_server_handle(handle); return &ret; } @@ -514,8 +516,8 @@ modify_principal_2_svc(mprinc_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; restriction_t *rp; @@ -559,9 +561,9 @@ modify_principal_2_svc(mprinc_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -570,10 +572,9 @@ generic_ret * rename_principal_2_svc(rprinc_arg *arg, struct svc_req *rqstp) { static generic_ret ret; - char *prime_arg1, - *prime_arg2; - gss_buffer_desc client_name, - service_name; + char *prime_arg1 = NULL, *prime_arg2 = NULL; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; restriction_t *rp; @@ -655,11 +656,11 @@ rename_principal_2_svc(rprinc_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } +exit_func: free(prime_arg1); free(prime_arg2); gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -669,8 +670,8 @@ get_principal_2_svc(gprinc_arg *arg, struct svc_req *rqstp) { static gprinc_ret ret; char *prime_arg, *funcname; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -719,9 +720,9 @@ get_principal_2_svc(gprinc_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -731,8 +732,8 @@ get_princs_2_svc(gprincs_arg *arg, struct svc_req *rqstp) { static gprincs_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -777,9 +778,9 @@ get_princs_2_svc(gprincs_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -789,8 +790,8 @@ chpass_principal_2_svc(chpass_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -840,9 +841,9 @@ chpass_principal_2_svc(chpass_arg *arg, struct svc_req *rqstp) } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -852,8 +853,8 @@ chpass_principal3_2_svc(chpass3_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -909,9 +910,9 @@ chpass_principal3_2_svc(chpass3_arg *arg, struct svc_req *rqstp) } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -921,8 +922,8 @@ setv4key_principal_2_svc(setv4key_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -969,9 +970,9 @@ setv4key_principal_2_svc(setv4key_arg *arg, struct svc_req *rqstp) } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -981,8 +982,8 @@ setkey_principal_2_svc(setkey_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1029,9 +1030,9 @@ setkey_principal_2_svc(setkey_arg *arg, struct svc_req *rqstp) } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1041,8 +1042,8 @@ setkey_principal3_2_svc(setkey3_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1092,9 +1093,9 @@ setkey_principal3_2_svc(setkey3_arg *arg, struct svc_req *rqstp) } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1106,8 +1107,8 @@ chrand_principal_2_svc(chrand_arg *arg, struct svc_req *rqstp) krb5_keyblock *k; int nkeys; char *prime_arg, *funcname; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1164,9 +1165,9 @@ chrand_principal_2_svc(chrand_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1178,8 +1179,8 @@ chrand_principal3_2_svc(chrand3_arg *arg, struct svc_req *rqstp) krb5_keyblock *k; int nkeys; char *prime_arg, *funcname; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1241,9 +1242,9 @@ chrand_principal3_2_svc(chrand3_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1253,8 +1254,8 @@ create_policy_2_svc(cpol_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1295,9 +1296,9 @@ create_policy_2_svc(cpol_arg *arg, struct svc_req *rqstp) if (errmsg != NULL) krb5_free_error_message(handle->context, errmsg); } +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1307,8 +1308,8 @@ delete_policy_2_svc(dpol_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1347,9 +1348,9 @@ delete_policy_2_svc(dpol_arg *arg, struct svc_req *rqstp) if (errmsg != NULL) krb5_free_error_message(handle->context, errmsg); } +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1359,8 +1360,8 @@ modify_policy_2_svc(mpol_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1400,9 +1401,9 @@ modify_policy_2_svc(mpol_arg *arg, struct svc_req *rqstp) if (errmsg != NULL) krb5_free_error_message(handle->context, errmsg); } +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1413,8 +1414,8 @@ get_policy_2_svc(gpol_arg *arg, struct svc_req *rqstp) static gpol_ret ret; kadm5_ret_t ret2; char *prime_arg, *funcname; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_principal_ent_rec caller_ent; kadm5_server_handle_t handle; @@ -1475,9 +1476,9 @@ get_policy_2_svc(gpol_arg *arg, struct svc_req *rqstp) log_unauth(funcname, prime_arg, &client_name, &service_name, rqstp); } +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; @@ -1488,8 +1489,8 @@ get_pols_2_svc(gpols_arg *arg, struct svc_req *rqstp) { static gpols_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1531,9 +1532,9 @@ get_pols_2_svc(gpols_arg *arg, struct svc_req *rqstp) if (errmsg != NULL) krb5_free_error_message(handle->context, errmsg); } +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1541,7 +1542,8 @@ exit_func: getprivs_ret * get_privs_2_svc(krb5_ui_4 *arg, struct svc_req *rqstp) { static getprivs_ret ret; - gss_buffer_desc client_name, service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1571,9 +1573,9 @@ getprivs_ret * get_privs_2_svc(krb5_ui_4 *arg, struct svc_req *rqstp) if (errmsg != NULL) krb5_free_error_message(handle->context, errmsg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1583,7 +1585,8 @@ purgekeys_2_svc(purgekeys_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg, *funcname; - gss_buffer_desc client_name, service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; @@ -1629,9 +1632,9 @@ purgekeys_2_svc(purgekeys_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1641,8 +1644,8 @@ get_strings_2_svc(gstrings_arg *arg, struct svc_req *rqstp) { static gstrings_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1688,9 +1691,9 @@ get_strings_2_svc(gstrings_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1700,8 +1703,8 @@ set_string_2_svc(sstring_arg *arg, struct svc_req *rqstp) { static generic_ret ret; char *prime_arg; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; OM_uint32 minor_stat; kadm5_server_handle_t handle; const char *errmsg = NULL; @@ -1744,9 +1747,9 @@ set_string_2_svc(sstring_arg *arg, struct svc_req *rqstp) krb5_free_error_message(handle->context, errmsg); } free(prime_arg); +exit_func: gss_release_buffer(&minor_stat, &client_name); gss_release_buffer(&minor_stat, &service_name); -exit_func: free_server_handle(handle); return &ret; } @@ -1754,8 +1757,8 @@ exit_func: generic_ret *init_2_svc(krb5_ui_4 *arg, struct svc_req *rqstp) { static generic_ret ret; - gss_buffer_desc client_name, - service_name; + gss_buffer_desc client_name = GSS_C_EMPTY_BUFFER; + gss_buffer_desc service_name = GSS_C_EMPTY_BUFFER; kadm5_server_handle_t handle; OM_uint32 minor_stat; const char *errmsg = NULL; @@ -1797,10 +1800,10 @@ generic_ret *init_2_svc(krb5_ui_4 *arg, struct svc_req *rqstp) rqstp->rq_cred.oa_flavor); if (errmsg != NULL) krb5_free_error_message(NULL, errmsg); - gss_release_buffer(&minor_stat, &client_name); - gss_release_buffer(&minor_stat, &service_name); exit_func: + gss_release_buffer(&minor_stat, &client_name); + gss_release_buffer(&minor_stat, &service_name); return(&ret); } -- 2.7.0
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