CVE-2018-10919

The Samba Active Directory LDAP server was vulnerable to an information disclosure flaw because of missing access control checks. An authenticated attacker could use this flaw to extract confidential attribute values using LDAP search expressions. Samba versions before 4.6.16, 4.7.9 and 4.8.4 are vulnerable.

The Samba Active Directory LDAP server was vulnerable to an information disclosure flaw because of missing access control checks. An authenticated attacker could use this flaw to extract confidential attribute values using LDAP search expressions. Samba versions before 4.6.16, 4.7.9 and 4.8.4 are vulnerable.

Updated samba packages fix security vulnerabilities:

A malicious server could return a directory entry that could corrupt libsmbclient memory (CVE-2018-10858).

Missing access control checks allow discovery of confidential attribute values via authenticated LDAP search expressions (CVE-2018-10919).

The samba package has been updated to version 4.6.16, fixing these issues and other bugs.

These are all security issues fixed in the ctdb-4.14.6+git.182.2205d5224e3-1.1 package on the GA media of openSUSE Tumbleweed.

This update for samba fixes the following issues:

The following security vulnerabilities were fixed:

• CVE-2018-1139: Disable NTLMv1 auth if smb.conf doesn't allow it; (bsc#1095048)
• CVE-2018-1140: ldbsearch '(distinguishedName=abc)' and DNS query with escapes crashes; (bsc#1095056)
• CVE-2018-10919: Confidential attribute disclosure via substring search; (bsc#1095057)
• CVE-2018-10858: smbc_urlencode helper function is a subject to buffer overflow; (bsc#1103411)
• CVE-2018-10918: Fix NULL ptr dereference in DsCrackNames on a user without a SPN; (bsc#1103414)

Samba was updated to 4.6.15, bringing bug and security fixes. (bsc#1110943)

Following security issues were fixed:

• CVE-2018-10919: Fix unauthorized attribute access via searches. (bsc#1095057);

Non-security bugs fixed:

• Fix ctdb_mutex_ceph_rados_helper deadlock (bsc#1102230).
• Allow idmap_rid to have primary group other than 'Domain Users' (bsc#1087931).
• winbind: avoid using fstrcpy in _dual_init_connection.
• Fix ntlm authentications with 'winbind use default domain = yes' (bsc#1068059).

Svyatoslav Phirsov discovered that the Samba libsmbclient library incorrectly handled extra long filenames. A malicious server could use this issue to cause Samba to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-10858)

Volker Mauel discovered that Samba incorrectly handled database output. When used as an Active Directory Domain Controller, a remote authenticated attacker could use this issue to cause Samba to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-10918)

Phillip Kuhrt discovered that the Samba LDAP server incorrectly handled certain confidential attribute values. A remote authenticated attacker could possibly use this issue to obtain certain sensitive information. (CVE-2018-10919)

Vivek Das discovered that Samba incorrectly handled NTLMv1 being explicitly disabled on the server. A remote user could possibly be authenticated using NTLMv1, contrary to expectations. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-1139)