On a Samba 4 AD DC the LDAP server in all versions of Samba from 4.0.0 onwards incorrectly validates permissions to modify passwords over LDAP allowing authenticated users to change any other users' passwords, including administrative users and privileged service accounts (eg Domain Controllers).

The remote NewStart CGSL host, running version MAIN 6.02, has samba packages installed that are affected by multiple vulnerabilities:

  - Multiple heap-based buffer overflows in the NDR parsing in smbd in Samba 3.0.0 through 3.0.25rc3 allow     remote attackers to execute arbitrary code via crafted MS-RPC requests involving (1) DFSEnum     (netdfs_io_dfs_EnumInfo_d), (2) RFNPCNEX (smb_io_notify_option_type_data), (3) LsarAddPrivilegesToAccount     (lsa_io_privilege_set), (4) NetSetFileSecurity (sec_io_acl), or (5) LsarLookupSids/LsarLookupSids2     (lsa_io_trans_names). (CVE-2007-2446)

  - The MS-RPC functionality in smbd in Samba 3.0.0 through 3.0.25rc3 allows remote attackers to execute     arbitrary commands via shell metacharacters involving the (1) SamrChangePassword function, when the     username map script smb.conf option is enabled, and allows remote authenticated users to execute     commands via shell metacharacters involving other MS-RPC functions in the (2) remote printer and (3) file     share management. (CVE-2007-2447)

  - Heap-based buffer overflow in the receive_smb_raw function in util/sock.c in Samba 3.0.0 through 3.0.29     allows remote attackers to execute arbitrary code via a crafted SMB response. (CVE-2008-1105)

  - Samba 3.4 before 3.4.2, 3.3 before 3.3.8, 3.2 before 3.2.15, and 3.0.12 through 3.0.36, as used in the SMB     subsystem in Apple Mac OS X 10.5.8 when Windows File Sharing is enabled, Fedora 11, and other operating     systems, does not properly handle errors in resolving pathnames, which allows remote authenticated users     to bypass intended sharing restrictions, and read, create, or modify files, in certain circumstances     involving user accounts that lack home directories. (CVE-2009-2813)

  - smbd in Samba 3.0 before 3.0.37, 3.2 before 3.2.15, 3.3 before 3.3.8, and 3.4 before 3.4.2 allows remote     authenticated users to cause a denial of service (infinite loop) via an unanticipated oplock break     notification reply packet. (CVE-2009-2906)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Various vulnerabilities were discovered in Samba, SMB/CIFS file, print, and login server/client for Unix

CVE-2017-9461

smbd in Samba had a denial of service vulnerability (fd_open_atomic infinite loop with high CPU usage and memory consumption) due to wrongly handling dangling symlinks.

CVE-2018-1050

Samba was vulnerable to a denial of service attack when the RPC spoolss service was configured to be run as an external daemon.
Missing input sanitization checks on some of the input parameters to spoolss RPC calls could have caused the print spooler service to crash.

CVE-2018-1057

On a Samba 4 AD DC the LDAP server of Samba incorrectly validated permissions to modify passwords over LDAP allowing authenticated users to change any other users' passwords, including administrative users and privileged service accounts (eg Domain Controllers).

Thanks to the Ubuntu security team for having backported the rather invasive changeset to Samba in Ubuntu 14.04 (which we could use to patch Samba in Debian jessie LTS).

CVE-2019-3880

A flaw was found in the way Samba implemented an RPC endpoint emulating the Windows registry service API. An unprivileged attacker could have used this flaw to create a new registry hive file anywhere they had unix permissions which could have lead to creation of a new file in the Samba share.

For Debian 8 'Jessie', these problems have been fixed in version 2:4.2.14+dfsg-0+deb8u12.

We recommend that you upgrade your samba packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Samba was updated to 4.6.14, fixing bugs and security issues :

Version update to 4.6.14 (bsc#1093664) :

  + vfs_ceph: add fake async pwrite/pread send/recv hooks;
    (bso#13425).

  + Fix memory leak in vfs_ceph; (bso#13424).

  + winbind: avoid using fstrcpy(dcname,...) in
    _dual_init_connection; (bso#13294).

  + s3:smb2_server: correctly maintain request counters for     compound requests; (bso#13215).

  + s3: smbd: Unix extensions attempts to change wrong field     in fchown call; (bso#13375).

  + s3:smbd: map nterror on smb2_flush errorpath;
    (bso#13338).

  + vfs_glusterfs: Fix the wrong pointer being sent in     glfs_fsync_async; (bso#13297).

  + s3: smbd: Fix possible directory fd leak if the     underlying OS doesn't support fdopendir(); (bso#13270).

  + s3: ldap: Ensure the ADS_STRUCT pointer doesn't get     freed on error, we don't own it here; (bso#13244).

  + s3:libsmb: allow -U'\\administrator' to work;
    (bso#13206).

  + CVE-2018-1057: s4:dsdb: fix unprivileged password     changes; (bso#13272); (bsc#1081024).

  + s3:smbd: Do not crash if we fail to init the session     table; (bso#13315).

  + libsmb: Use smb2 tcon if conn_protocol >= SMB2_02;
    (bso#13310).

  + smbXcli: Add 'force_channel_sequence'; (bso#13215).

  + smbd: Fix channel sequence number checks for     long-running requests; (bso#13215).

  + s3:smb2_server: allow logoff, close, unlock, cancel and     echo on expired sessions; (bso#13197).

  + s3:smbd: return the correct error for cancelled SMB2     notifies on expired sessions; (bso#13197).

  + samba: Only use async signal-safe functions in signal     handler; (bso#13240).

  + subnet: Avoid a segfault when renaming subnet objects;
    (bso#13031).

  - Fix vfs_ceph with 'aio read size' or 'aio write size' >     0; (bsc#1093664).

  + vfs_ceph: add fake async pwrite/pread send/recv hooks;
    (bso#13425).

  + Fix memory leak in vfs_ceph; (bso#13424).

This update was imported from the SUSE:SLE-12-SP3:Update update project.

Samba was updated to 4.6.14, fixing bugs and security issues: Version update to 4.6.14 (bsc#1093664) :

  + vfs_ceph: add fake async pwrite/pread send/recv hooks;
    (bso#13425).

  + Fix memory leak in vfs_ceph; (bso#13424).

  + winbind: avoid using fstrcpy(dcname,...) in
    _dual_init_connection; (bso#13294).

  + s3:smb2_server: correctly maintain request counters for     compound requests; (bso#13215).

  + s3: smbd: Unix extensions attempts to change wrong field     in fchown call; (bso#13375).

  + s3:smbd: map nterror on smb2_flush errorpath;
    (bso#13338).

  + vfs_glusterfs: Fix the wrong pointer being sent in     glfs_fsync_async; (bso#13297).

  + s3: smbd: Fix possible directory fd leak if the     underlying OS doesn't support fdopendir(); (bso#13270).

  + s3: ldap: Ensure the ADS_STRUCT pointer doesn't get     freed on error, we don't own it here; (bso#13244).

  + s3:libsmb: allow -U'\\administrator' to work;
    (bso#13206).

  + CVE-2018-1057: s4:dsdb: fix unprivileged password     changes; (bso#13272); (bsc#1081024).

  + s3:smbd: Do not crash if we fail to init the session     table; (bso#13315).

  + libsmb: Use smb2 tcon if conn_protocol >= SMB2_02;
    (bso#13310).

  + smbXcli: Add 'force_channel_sequence'; (bso#13215).

  + smbd: Fix channel sequence number checks for     long-running requests; (bso#13215).

  + s3:smb2_server: allow logoff, close, unlock, cancel and     echo on expired sessions; (bso#13197).

  + s3:smbd: return the correct error for cancelled SMB2     notifies on expired sessions; (bso#13197).

  + samba: Only use async signal-safe functions in signal     handler; (bso#13240).

  + subnet: Avoid a segfault when renaming subnet objects;
    (bso#13031).

  - Fix vfs_ceph with 'aio read size' or 'aio write size' >     0; (bsc#1093664).

  + vfs_ceph: add fake async pwrite/pread send/recv hooks;
    (bso#13425).

  + Fix memory leak in vfs_ceph; (bso#13424).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote host is affected by the vulnerability described in GLSA-201805-07 (Samba: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Samba. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could possibly execute arbitrary code, cause a Denial       of Service condition, conduct a man-in-the-middle attack, or obtain       sensitive information.
  Workaround :

    There is no known workaround at this time.

Security fix for CVE-2018-1050 CVE-2018-1057

----

Update to Samba 4.6.13

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of Samba running on the remote host is 4.5.x prior to 4.5.16, or 4.6.x prior to 4.6.14, or 4.7.x prior to 4.7.6. It is, therefore, affected by a remote DoS and a remote password manipulation vulnerability.

Note: Refer to the advisories for possible workarounds.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Security fix for CVE-2018-1050 CVE-2018-1057

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3595-1 advisory.

    Bjrn Baumbach discovered that Samba incorrectly validated permissions when changing account passwords     via LDAP. An authenticated attacker could use this issue to change the password of other users, including     administrators, and perform actions as those users. (CVE-2018-1057)

    It was discovered that Samba incorrectly validated inputs to the RPC spoolss service. An authenticated     attacker could use this issue to cause the service to crash, resulting in a denial of service.
    (CVE-2018-1050)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The samba project reports :

Missing NULL pointer checks may crash the external print server process.

On a Samba 4 AD DC any authenticated user can change other user's passwords over LDAP, including the passwords of administrative users and service accounts.

Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix. The Common Vulnerabilities and Exposures project identifies the following issues :

  - CVE-2018-1050     It was discovered that Samba is prone to a denial of     service attack when the RPC spoolss service is     configured to be run as an external daemon.

    https://www.samba.org/samba/security/CVE-2018-1050.html

  - CVE-2018-1057     Bjoern Baumbach from Sernet discovered that on Samba 4     AD DC the LDAP server incorrectly validates permissions     to modify passwords over LDAP allowing authenticated     users to change any other users passwords, including     administrative users.

    https://www.samba.org/samba/security/CVE-2018-1057.html

    https://wiki.samba.org/index.php/CVE-2018-1057

New samba packages are available for Slackware 14.0, 14.1, 14.2, and
-current to fix security a issue.

ID	Name	Product	Family	Severity
206855	NewStart CGSL MAIN 6.02 : samba Multiple Vulnerabilities (NS-SA-2024-0054)	Nessus	NewStart CGSL Local Security Checks	critical
123959	Debian DLA-1754-1 : samba security update	Nessus	Debian Local Security Checks	high
110593	openSUSE Security Update : samba (openSUSE-2018-649)	Nessus	SuSE Local Security Checks	high
110531	SUSE SLED12 / SLES12 Security Update : samba (SUSE-SU-2018:1687-1)	Nessus	SuSE Local Security Checks	high
109974	GLSA-201805-07 : Samba: Multiple vulnerabilities (SambaCry)	Nessus	Gentoo Local Security Checks	critical
108501	Fedora 26 : 2:samba (2018-7d0acd608b)	Nessus	Fedora Local Security Checks	high
108378	Samba 4.5.x < 4.5.16 / 4.6.x < 4.6.14 / 4.7.x < 4.7.6 Multiple Vulnerabilities	Nessus	Misc.	high
108349	Fedora 27 : 2:samba / libldb (2018-c5c651ac44)	Nessus	Fedora Local Security Checks	high
108335	Ubuntu 14.04 LTS / 16.04 LTS : Samba vulnerabilities (USN-3595-1)	Nessus	Ubuntu Local Security Checks	high
108316	FreeBSD : samba -- multiple vulnerabilities (fb26f78a-26a9-11e8-a1c2-00505689d4ae)	Nessus	FreeBSD Local Security Checks	high
108304	Debian DSA-4135-1 : samba - security update	Nessus	Debian Local Security Checks	high
108303	Slackware 14.0 / 14.1 / 14.2 / current : samba (SSA:2018-072-02)	Nessus	Slackware Local Security Checks	high

Detections

Analytics

CVE-2018-1057

high

Tenable Plugins

critical

high

high

high

critical

high

high

high

high

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high