CVE-2020-25720

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks.

This update for samba fixes the following issues:

samba was updated to version 4.17.9:

• CVE-2022-2127: Fixed issue where lm_resp_len was not checked properly in winbindd_pam_auth_crap_send (bsc#1213174).
• CVE-2023-34966: Fixed samba spotlight mdssvc RPC Request Infinite Loop Denial-of-Service Vulnerability (bsc#1213173).
• CVE-2023-34967: Fixed samba spotlight mdssvc RPC Request Type Confusion Denial-of-Service Vulnerability (bsc#1213172).
• CVE-2023-34968: Fixed spotlight server-side Share Path Disclosure (bsc#1213171).
• CVE-2023-3347: Fixed issue where SMB2 packet signing not enforced (bsc#1213170).
• CVE-2020-25720: Fixed issue where creating child permission allowed full write to all attributes (bsc#1213386).

Bugfixes:

• Fixed trust relationship failure (bsc#1213384).
• Backported --pidl-developer fixes.
• Fixed smbd_scavenger crash when service smbd is stopped.
• Fixed issue where vfs_fruit might cause a failing open for delete.
• Fixed named crashes on DLZ zone update.
• Fixed issue where winbind recurses into itself via rpcd_lsad.
• Fixed cli_list looping 100% CPU against pre-lanman2 servers.
• Fixed smbclient leaks fds with showacls.
• Fixed aes256 smb3 encryption algorithms not allowed in smb3_sid_parse().
• Fixed winbindd getting stuck on NT_STATUS_RPC_SEC_PKG_ERROR.
• Fixed smbget memory leak if failed to download files recursively.
• Fixed log flood: smbd_calculate_access_mask_fsp: Access denied: message level should be lower.
• Fixed floating point exception (FPE) via cli_pull_send at source3/libsmb/clireadwrite.c.
• Fixed test_tstream_more_tcp_user_timeout_spin fails intermittently on Rackspace GitLab runners.
• Reduce flapping of ridalloc test.
• Fixed unreliable large_ldap test.
• Fixed filename parser not checking veto files smb.conf parameter.
• Fixed mdssvc may crash when initializing.
• Fixed broken large directory optimization for non-lcomp path elements
• Fixed streams_depot failing to create streams.
• Fixed shadow_copy2 and streams_depot issues.
• Fixed wbinfo -u fails on ad dc with >1000 users.
• Fixed winbindd idmap child contacting the domain controller without a need.
• Fixed idmap_autorid may fail to map sids of trusted domains for the first time.
• Fixed idmap_hash doesn't use ID_TYPE_BOTH for reverse mappings.
• Fixed net ads search -P doesn't work against servers in other domains.
• Fixed DS ACEs might be inherited to unrelated object classes.
• Fixed temporary smbXsrv_tcon_global.tdb can't be parsed.
• Fixed setting veto files = /.*/ breaking listing directories (bsc#1212375).
• Fixed dsgetdcname assuming local system uses IPv4.