Date: Thu, 1 Dec 2022 14:26:10 GMT From: Cy Schubert <cy@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 942281f6e23a - stable/12 - heimdal: Add missing kadmind error checks Message-ID: <202212011426.2B1EQARx079737@gitrepo.freebsd.org>
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The branch stable/12 has been updated by cy: URL: https://cgit.FreeBSD.org/src/commit/?id=942281f6e23aa5f12dad78d5c4244374aaba6efb commit 942281f6e23aa5f12dad78d5c4244374aaba6efb Author: Cy Schubert <cy@FreeBSD.org> AuthorDate: 2022-11-26 17:48:31 +0000 Commit: Cy Schubert <cy@FreeBSD.org> CommitDate: 2022-12-01 14:25:53 +0000 heimdal: Add missing kadmind error checks Inspired by: Heimdal commmit 1b213c1082be4ef5a1c23928d614c762f837dbe7 (cherry picked from commit 80999dcd5bdebd0beb2591a1de3f6db9767c0066) --- crypto/heimdal/kadmin/server.c | 108 ++++++++++++++++++++++++----------------- 1 file changed, 63 insertions(+), 45 deletions(-) diff --git a/crypto/heimdal/kadmin/server.c b/crypto/heimdal/kadmin/server.c index 2800a2e1fc29..ed6ba5a1f790 100644 --- a/crypto/heimdal/kadmin/server.c +++ b/crypto/heimdal/kadmin/server.c @@ -38,7 +38,8 @@ static kadm5_ret_t kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, krb5_data *in, krb5_data *out) { - kadm5_ret_t ret; + kadm5_ret_t ret = 0; + kadm5_ret_t ret_sp = 0; int32_t cmd, mask, tmp; kadm5_server_context *contextp = kadm_handlep; char client[128], name[128], name2[128]; @@ -50,16 +51,23 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, int n_keys; char **princs; int n_princs; - krb5_storage *sp; + krb5_storage *rsp = NULL; /* response goes here */ + krb5_storage *sp = NULL; - krb5_unparse_name_fixed(contextp->context, contextp->caller, + memset(&ent, 0, sizeof(ent)); + krb5_data_zero(out); + ret = krb5_unparse_name_fixed(contextp->context, contextp->caller, client, sizeof(client)); sp = krb5_storage_from_data(in); if (sp == NULL) krb5_errx(contextp->context, 1, "out of memory"); - krb5_ret_int32(sp, &cmd); + ret = krb5_ret_int32(sp, &cmd); + if (ret) { + krb5_storage_free(sp); + goto fail; + } switch(cmd){ case kadm_get:{ op = "GET"; @@ -72,9 +80,10 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, goto fail; } mask |= KADM5_PRINCIPAL; - krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); + ret = krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); krb5_warnx(contextp->context, "%s: %s %s", client, op, name); - ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_GET, princ); + if (ret == 0) + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_GET, princ); if(ret){ krb5_free_principal(contextp->context, princ); goto fail; @@ -95,9 +104,10 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, ret = krb5_ret_principal(sp, &princ); if(ret) goto fail; - krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); + ret = krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); krb5_warnx(contextp->context, "%s: %s %s", client, op, name); - ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_DELETE, princ); + if (ret == 0) + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_DELETE, princ); if(ret){ krb5_free_principal(contextp->context, princ); goto fail; @@ -124,10 +134,11 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, kadm5_free_principal_ent(contextp->context, &ent); goto fail; } - krb5_unparse_name_fixed(contextp->context, ent.principal, + ret = krb5_unparse_name_fixed(contextp->context, ent.principal, name, sizeof(name)); krb5_warnx(contextp->context, "%s: %s %s", client, op, name); - ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_ADD, + if (ret == 0) + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_ADD, ent.principal); if(ret){ kadm5_free_principal_ent(contextp->context, &ent); @@ -155,10 +166,11 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, kadm5_free_principal_ent(contextp, &ent); goto fail; } - krb5_unparse_name_fixed(contextp->context, ent.principal, + ret = krb5_unparse_name_fixed(contextp->context, ent.principal, name, sizeof(name)); krb5_warnx(contextp->context, "%s: %s %s", client, op, name); - ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_MODIFY, + if (ret == 0) + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_MODIFY, ent.principal); if(ret){ kadm5_free_principal_ent(contextp, &ent); @@ -181,11 +193,13 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, krb5_free_principal(contextp->context, princ); goto fail; } - krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); - krb5_unparse_name_fixed(contextp->context, princ2, name2, sizeof(name2)); + ret = krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); + if (ret == 0) + ret = krb5_unparse_name_fixed(contextp->context, princ2, name2, sizeof(name2)); krb5_warnx(contextp->context, "%s: %s %s -> %s", client, op, name, name2); - ret = _kadm5_acl_check_permission(contextp, + if (ret == 0) + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_ADD, princ2) || _kadm5_acl_check_permission(contextp, @@ -214,7 +228,7 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, krb5_free_principal(contextp->context, princ); goto fail; } - krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); + ret = krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); krb5_warnx(contextp->context, "%s: %s %s", client, op, name); /* @@ -227,26 +241,28 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, * c) the user is on the CPW ACL. */ - if (krb5_config_get_bool_default(contextp->context, NULL, TRUE, - "kadmin", "allow_self_change_password", NULL) - && initial - && krb5_principal_compare (contextp->context, contextp->caller, - princ)) - { - krb5_data pwd_data; - const char *pwd_reason; - - pwd_data.data = password; - pwd_data.length = strlen(password); - - pwd_reason = kadm5_check_password_quality (contextp->context, - princ, &pwd_data); - if (pwd_reason != NULL) - ret = KADM5_PASS_Q_DICT; - else - ret = 0; - } else - ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_CPW, princ); + if (ret == 0) { + if (krb5_config_get_bool_default(contextp->context, NULL, TRUE, + "kadmin", "allow_self_change_password", NULL) + && initial + && krb5_principal_compare (contextp->context, contextp->caller, + princ)) + { + krb5_data pwd_data; + const char *pwd_reason; + + pwd_data.data = password; + pwd_data.length = strlen(password); + + pwd_reason = kadm5_check_password_quality (contextp->context, + princ, &pwd_data); + if (pwd_reason != NULL) + ret = KADM5_PASS_Q_DICT; + else + ret = 0; + } else + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_CPW, princ); + } if(ret) { krb5_free_principal(contextp->context, princ); @@ -304,7 +320,7 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, } } - krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); + ret = krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); krb5_warnx(contextp->context, "%s: %s %s", client, op, name); /* @@ -312,7 +328,8 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, * this it to force password quality check on the user. */ - ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_CPW, princ); + if (ret == 0) + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_CPW, princ); if(ret) { int16_t dummy = n_key_data; @@ -339,7 +356,7 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, ret = krb5_ret_principal(sp, &princ); if(ret) goto fail; - krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); + ret = krb5_unparse_name_fixed(contextp->context, princ, name, sizeof(name)); krb5_warnx(contextp->context, "%s: %s %s", client, op, name); /* * The change is allowed if at least one of: @@ -347,13 +364,14 @@ kadmind_dispatch(void *kadm_handlep, krb5_boolean initial, * b) the user is on the CPW ACL. */ - if (initial - && krb5_principal_compare (contextp->context, contextp->caller, + if (ret == 0) { + if (initial + && krb5_principal_compare (contextp->context, contextp->caller, princ)) - ret = 0; - else - ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_CPW, princ); - + ret = 0; + else + ret = _kadm5_acl_check_permission(contextp, KADM5_PRIV_CPW, princ); + } if(ret) { krb5_free_principal(contextp->context, princ); goto fail;
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