ldap_modify:更改密码时访问权限不足(50)

ldap_modify:更改密码时访问权限不足(50)

我正在尝试修改 CentOS 6.7(类似于 RHEL 6.7)上全新安装的 OpenLDAP 上的 LDAP 管理员密码。

我创建了一个名为的文件change_ldap_password.ldif

# Hash your password:
# slappasswd -h {SSHA} -s "my_password"

# I also tried {1}hdb instead of {0}config
dn: olcDatabase={0}config,cn=config
changetype: modify
add: olcRootPW
olcRootPW: {SSHA}YP8q2haCD1POSzQC3GAuBdrfaHh+/Y49

当我以 root 身份运行以下命令时,出现访问错误:

# ldapmodify -x  -W -D "cn=admin,dc=my_domain,dc=com" -f ./change_ldap_password.ldif
Enter LDAP Password:
modifying entry "olcDatabase={0}config,cn=config"
ldap_modify: Insufficient access (50)

这是 ldapwhoami 的输出:

# ldapwhoami -x  -W -D "cn=admin,dc=my_domain,dc=com"
Enter LDAP Password:
dn:cn=admin,dc=my_domain,dc=com

以下是在 cn=config 中对 olcRoot 进行 grepping 的结果:

# grep -R olcRoot /etc/openldap/slapd.d/cn=config
/etc/openldap/slapd.d/cn=config/olcDatabase={1}hdb.ldif:olcRootDN: cn=admin,dc=my_domain,dc=com
/etc/openldap/slapd.d/cn=config/olcDatabase={1}hdb.ldif:olcRootPW:: ...

这是 ldapmodify 的调试信息:

# ldapmodify -x  -W -D "cn=admin,dc=my_domain,dc=com" -f ./change_ldap_password.ldif -d1
ldap_create
Enter LDAP Password:
ldap_sasl_bind
ldap_send_initial_request
ldap_new_connection 1 1 0
ldap_int_open_connection
ldap_connect_to_host: TCP localhost:389
ldap_new_socket: 4
ldap_prepare_socket: 4
ldap_connect_to_host: Trying 127.0.0.1:389
ldap_pvt_connect: fd: 4 tm: -1 async: 0
attempting to connect:
connect errno: 111
ldap_close_socket: 4
ldap_int_open_connection
ldap_connect_to_path
ldap_new_socket: 4
ldap_connect_to_path: Trying /var/run/ldapi
ldap_connect_timeout: fd: 4 tm: -1 async: 0
ldap_ndelay_on: 4
ldap_close_socket: 4
ldap_int_open_connection
ldap_connect_to_host: TCP localhost:636
ldap_new_socket: 4
ldap_prepare_socket: 4
ldap_connect_to_host: Trying 127.0.0.1:636
ldap_pvt_connect: fd: 4 tm: -1 async: 0
attempting to connect:
connect success
TLS: certdb config: configDir='/etc/openldap/certs' tokenDescription='ldap(0)' certPrefix='' keyPrefix='' flags=readOnly
TLS: using moznss security dir /etc/openldap/certs prefix .
TLS: certificate [CN=my_server.my_domain.com] is valid
TLS certificate verification: subject: CN=my_server.my_domain.com, issuer: CN=my_server.my_domain.com, cipher: AES-256, security level: high, secret key bits: 256, total key bits: 256, cache hits: 0, cache misses: 0, cache not reusable: 0
ldap_open_defconn: successful
ldap_send_server_request
ber_scanf fmt ({it) ber:
ber_scanf fmt ({i) ber:
ber_flush2: 50 bytes to sd 4
ldap_result ld 0x184a340 msgid 1
wait4msg ld 0x184a340 msgid 1 (infinite timeout)
wait4msg continue ld 0x184a340 msgid 1 all 1
** ld 0x184a340 Connections:
* host: (null)  port: 636  (default)
  refcnt: 2  status: Connected
  last used: Fri Oct 30 14:04:24 2015


** ld 0x184a340 Outstanding Requests:
 * msgid 1,  origid 1, status InProgress
   outstanding referrals 0, parent count 0
  ld 0x184a340 request count 1 (abandoned 0)
** ld 0x184a340 Response Queue:
   Empty
  ld 0x184a340 response count 0
ldap_chkResponseList ld 0x184a340 msgid 1 all 1
ldap_chkResponseList returns ld 0x184a340 NULL
ldap_int_select
read1msg: ld 0x184a340 msgid 1 all 1
ber_get_next
ber_get_next: tag 0x30 len 12 contents:
read1msg: ld 0x184a340 msgid 1 message type bind
ber_scanf fmt ({eAA) ber:
read1msg: ld 0x184a340 0 new referrals
read1msg:  mark request completed, ld 0x184a340 msgid 1
request done: ld 0x184a340 msgid 1
res_errno: 0, res_error: <>, res_matched: <>
ldap_free_request (origid 1, msgid 1)
ldap_parse_result
ber_scanf fmt ({iAA) ber:
ber_scanf fmt (}) ber:
ldap_msgfree
modifying entry "olcDatabase={0}config,cn=config"
ldap_modify_ext
ldap_send_initial_request
ldap_send_server_request
ber_scanf fmt ({it) ber:
ber_scanf fmt ({) ber:
ber_flush2: 102 bytes to sd 4
ldap_result ld 0x184a340 msgid 2
wait4msg ld 0x184a340 msgid 2 (timeout 100000 usec)
wait4msg continue ld 0x184a340 msgid 2 all 1
** ld 0x184a340 Connections:
* host: (null)  port: 636  (default)
  refcnt: 2  status: Connected
  last used: Fri Oct 30 14:04:24 2015


** ld 0x184a340 Outstanding Requests:
 * msgid 2,  origid 2, status InProgress
   outstanding referrals 0, parent count 0
  ld 0x184a340 request count 1 (abandoned 0)
** ld 0x184a340 Response Queue:
   Empty
  ld 0x184a340 response count 0
ldap_chkResponseList ld 0x184a340 msgid 2 all 1
ldap_chkResponseList returns ld 0x184a340 NULL
ldap_int_select
read1msg: ld 0x184a340 msgid 2 all 1
ber_get_next
ber_get_next: tag 0x30 len 12 contents:
read1msg: ld 0x184a340 msgid 2 message type modify
ber_scanf fmt ({eAA) ber:
read1msg: ld 0x184a340 0 new referrals
read1msg:  mark request completed, ld 0x184a340 msgid 2
request done: ld 0x184a340 msgid 2
res_errno: 50, res_error: <>, res_matched: <>
ldap_free_request (origid 2, msgid 2)
ldap_parse_result
ber_scanf fmt ({iAA) ber:
ber_scanf fmt (}) ber:
ldap_msgfree
ldap_err2string
ldap_modify: Insufficient access (50)

ldap_free_connection 1 1
ldap_send_unbind
ber_flush2: 7 bytes to sd 4
ldap_free_connection: actually freed

如果我输入了错误的密码,错误将从访问权限不足变为凭证无效:

ldap_bind: Invalid credentials (49)

我看见这个 ServerFault 问题,但那一个是关于具有有限权限的用户,而不是管理员或根用户。

我该如何克服这个ldap_modify: Insufficient access (50)错误?

为什么作为 LDAP 管理员的 root 没有权限更改密码?

如果这是推荐的解决方案,我可以重新安装 slapd。我想在继续操作之前解决此错误。

编辑:转到 ldapi:/// 上的 cn=config 会出现以下错误:

# ldapsearch -H ldapi:/// -Y EXTERNAL -b 'cn=config' -d1
ldap_url_parse_ext(ldapi:///)
ldap_create
ldap_url_parse_ext(ldapi:///??base)
ldap_sasl_interactive_bind: user selected: EXTERNAL
ldap_int_sasl_bind: EXTERNAL
ldap_new_connection 1 1 0
ldap_int_open_connection
ldap_connect_to_path
ldap_new_socket: 3
ldap_connect_to_path: Trying /var/run/ldapi
ldap_connect_timeout: fd: 3 tm: -1 async: 0
ldap_ndelay_on: 3
ldap_close_socket: 3
ldap_msgfree
ldap_err2string
ldap_sasl_interactive_bind_s: Can't contact LDAP server (-1)

我认为我已经ldapi://在中定义过/etc/openldap/ldap.conf,但我不确定ldapi:///

#
# LDAP Defaults
#

# See ldap.conf(5) for details
# This file should be world readable but not world writable.

BASE    dc=my_domain,dc=com
#URI    ldap://ldap.example.com ldap://ldap-master.example.com:666
URI     ldap:// ldapi:// ldaps://

#SIZELIMIT  12
#TIMELIMIT  15
#DEREF          never

TLS_CACERTDIR /etc/openldap/certs

编辑2ldap_sasl_interactive_bind_s: Can't contact LDAP server (-1):停止防火墙后我收到同样的错误( service iptables stop),所以防火墙不是问题。

答案1

为了管理“cn=config”数据库,您需要“cn=config”管理员,而不是数据数据库的管理员。在 Debian 中,此类管理员是具有 SASL TLS External 的 root。尝试

sudo ldapsearch -H ldapi:/// -Y EXTERNAL -b 'cn=config'

确认上述操作有效后,您可以更改密码。首先,对值进行哈希处理:

slappasswd -h {SSHA} -s "my_password"

然后,将散列值粘贴到 ldif 文件中,例如./change_ldap_password.ldif

dn: olcDatabase={0}config,cn=config
changetype: modify
add: olcRootPW
olcRootPW: {SSHA}cZbRoOhRew8MBiWGSEOiFX0XqbAQwXUr

最后,应用 ldif 文件:

sudo ldapmodify -H ldapi:/// -Y EXTERNAL -D 'cn=config' -f ./change_ldap_password.ldif

不建议使用 更改密码ldapmodify。如果用户存在(不是这种情况),ldappasswd则更好。

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