Heap-based buffer overflow in process.c in smbd in Samba 3.0, as used in the file-sharing service on the BlackBerry PlayBook tablet before 2.0.0.7971 and other products, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a Batched (aka AndX) request that triggers infinite recursion.

The version of Samba running on the remote host is prior to 3.4.0. It is, therefore, affected by a remote code execution vulnerability in process.c due to a heap-based buffer overflow.  An unauthenticated, remote attacker can exploit this to bypass authentication and execute arbitrary commands via Batched / AndX request.

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

According to its banner, the version of Samba is 3.x earlier than 3.4.0.  It is therefore affected by an overflow condition.  The application fails to properly sanitize user-supplied input resulting in a heap-based buffer overflow.  With a specially crafted 'Any Batched (AndX)' request packet, a remote attacker can potentially cause arbitrary code execution.

- Add the ldapsmb sources as else patches against them     have no chance to apply.

  - Samba pre-3.6.4 are affected by a vulnerability that     allows remote code exe- cution as the 'root' user; PIDL     based autogenerated code allows overwriting beyond of     allocated array; CVE-2012-1182; (bso#8815);
    (bnc#752797).

  - s3-winbindd: Only use SamLogonEx when we can get     unencrypted session keys; (bso#8599).

  - Correctly handle DENY ACEs when privileges apply;
    (bso#8797).

  - s3:smb2_server: fix a logic error, we should sign non     guest sessions; (bso8749).

  - Allow vfs_aio_pthread to build as a static module;
    (bso#8723).

  - s3:dbwrap_ctdb: return the number of records in     db_ctdb_traverse() for persistent dbs; (#bso8527).

  - s3: segfault in dom_sid_compare(bso#8567).

  - Honor SeTakeOwnershiPrivilege when client asks for     SEC_STD_WRITE_OWNER; (bso#8768).

  - s3-winbindd: Close netlogon connection if the status     returned by the NetrSamLogonEx call is timeout in the     pam_auth_crap path; (bso#8771).

  - s3-winbindd: set the can_do_validation6 also for trusted     domain; (bso#8599).

  - Fix problem when calculating the share security mask,     take priviliges into account for the connecting user;
    (bso#8784).

  - Fix crash in dcerpc_lsa_lookup_sids_noalloc() with over     1000 groups; (bso#8807); (bnc#751454).

  - Remove obsoleted Authors lines from spec file for     post-11.2 systems.

  - Make ldapsmb build with Fedora 15 and 16; (bso#8783).

  - BuildRequire libuuid-devel for post-11.0 and other     systems.

  - Define missing python macros for non SUSE systems.

  - PreReq to fillup_prereq and insserv_prereq only on SUSE     systems.

  - Always use cifstab instead of smbfstab on non SUSE     systems.

  - Ensure AndX offsets are increasing strictly     monotonically in pre-3.4 versions; CVE-2012-0870;
    (bnc#747934).

  - Add SERVERID_UNIQUE_ID_NOT_TO_VERIFY; (bso#8760);
    (bnc#741854).

  - s3-printing: fix crash in printer_list_set_printer();
    (bso#8762); (bnc#746825).

The remote Oracle Linux 5 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2012-0332 advisory.

    - Security release, fixes CVE-2012-0870

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

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

Samba is a suite of programs used by machines to share files, printers, and other information.

An input validation flaw was found in the way Samba handled Any Batched (AndX) requests. A remote, unauthenticated attacker could send a specially crafted SMB packet to the Samba server, possibly resulting in arbitrary code execution with the privileges of the Samba server (root). (CVE-2012-0870)

Users of Samba are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing this update, the smb service will be restarted automatically.

The remote host is affected by the vulnerability described in GLSA-201206-22 (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 with root       privileges, cause a Denial of Service condition, take ownership of shared       files, or bypass file permissions. Furthermore, a local attacker may be       able to cause a Denial of Service condition or obtain sensitive       information in a Samba credentials file.
  Workaround :

    There is no known workaround at this time.

The remote host is running a version of Mac OS X 10.6 that does not have Security Update 2012-002 applied. This update contains multiple security-related fixes for the following components :

  - curl
  - Directory Service
  - ImageIO
  - libarchive
  - libsecurity
  - libxml
  - Quartz Composer
  - QuickTime
  - Ruby
  - Samba
  - Security Framework

The following issues have been fixed in Samba :

  - PIDL based autogenerated code uses client supplied size     values which allows attackers to write beyond the     allocated array size. (CVE-2012-1182)

  - Ensure AndX offsets are increasing strictly     monotonically in pre-3.4 versions. (CVE-2012-0870)

  - Fix memory leak in parent smbd on connection Also the     following non-security bugs have been fixed :.
    (CVE-2012-0817)

  - s3-winbindd: Only use SamLogonEx when we can get     unencrypted session keys; (bso#8599).

  - Correctly handle DENY ACEs when privileges apply;
    (bso#8797).

  - s3:smb2_server: fix a logic error, we should sign non     guest sessions; (bso8749).

  - Allow vfs_aio_pthread to build as a static module;
    (bso#8723).

  - s3:dbwrap_ctdb: return the number of records in     db_ctdb_traverse() for persistent dbs; (#bso8527).

  - s3: segfault in dom_sid_compare(bso#8567).

  - Honor SeTakeOwnershiPrivilege when client asks for     SEC_STD_WRITE_OWNER; (bso#8768).

  - s3-winbindd: Close netlogon connection if the status     returned by the NetrSamLogonEx call is timeout in the     pam_auth_crap path; (bso#8771).

  - s3-winbindd: set the can_do_validation6 also for trusted     domain; (bso#8599).

  - Fix problem when calculating the share security mask,     take priviliges into account for the connecting user;
    (bso#8784).

  - Fix crash in dcerpc_lsa_lookup_sids_noalloc() with over     1000 groups; (bso#8807);. (bnc#751454)

  - Add SERVERID_UNIQUE_ID_NOT_TO_VERIFY; (bso#8760);.
    (bnc#741854)

  - s3-printing: fix crash in printer_list_set_printer();
    (bso#8762);. (bnc#746825)

  - s3:winbindd fix a return code check; (bso#8406).

  - s3: Add rmdir operation to streams_depot; (bso#8733).

  - s3:smbd:smb2: fix an assignment-instead-of-check bug     conn_snum_used(); (bso#8738).

  - s3:auth: fill the sids array of the info3 in     wbcAuthUserInfo_to_netr_SamInfo3(); (bso#8739).

  - Do not map POSIX execute permission to Windows     FILE_READ_ATTRIBUTES; (bso#8631);. (bnc#732572)

  - Remove all precompiled idl output to ensure any pidl     changes take effect;. (bnc#757080)

The remote Samba install is prone to a heap-based buffer overflow attack.

An attacker can exploit this issue to execute arbitrary code with the privileges of the application. Failed exploit attempts will result in a denial of service condition.

This update of Samba fixes a heap-based buffer overflow that could be exploited by remote, unauthenticated attackers to crash the smbd daemon or potentially execute arbitrary code via specially crafted SMB AndX request packets. (CVE-2012-0870)

Also fixed two non security bugs :

  - Fix to handle domain join using NetBIOS name;.
    (bnc#633729)

  - Fixed the DFS referral response for msdfs root;.
    (bnc#703655)

Andy Davis discovered that Samba incorrectly handled certain AndX offsets. A remote attacker could send a specially crafted request to the server and cause a denial of service, or possibly execute arbitrary code.

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

The remote Redhat Enterprise Linux 4 / 5 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2012:0332 advisory.

  - samba: Any Batched (AndX) request processing infinite recursion and heap-based buffer overflow     (CVE-2012-0870)

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

Updated samba packages that fix one security issue are now available for Red Hat Enterprise Linux 4 and 5, and Red Hat Enterprise Linux 5.3 Long Life, and 5.6 Extended Update Support.

The Red Hat Security Response Team has rated this update as having critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Samba is a suite of programs used by machines to share files, printers, and other information.

An input validation flaw was found in the way Samba handled Any Batched (AndX) requests. A remote, unauthenticated attacker could send a specially crafted SMB packet to the Samba server, possibly resulting in arbitrary code execution with the privileges of the Samba server (root). (CVE-2012-0870)

Red Hat would like to thank the Samba team for reporting this issue.
Upstream acknowledges Andy Davis of NGS Secure as the original reporter.

Users of Samba are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing this update, the smb service will be restarted automatically.

ID	Name	Product	Family	Severity
122058	Samba < 3.4.0 Remote Code Execution Vulnerability	Nessus	Misc.	high
9349	Samba 3.x < 3.4.0 Buffer Overflow	Nessus Network Monitor	Samba	high
74600	openSUSE Security Update : samba (openSUSE-SU-2012:0507-1)	Nessus	SuSE Local Security Checks	critical
68490	Oracle Linux 5 : samba (ELSA-2012-0332)	Nessus	Oracle Linux Local Security Checks	critical
61276	Scientific Linux Security Update : samba on SL5.x i386/x86_64 (20120223)	Nessus	Scientific Linux Local Security Checks	high
61275	Scientific Linux Security Update : samba on SL4.x i386/x86_64 (20120223)	Nessus	Scientific Linux Local Security Checks	high
59675	GLSA-201206-22 : Samba: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
59067	Mac OS X Multiple Vulnerabilities (Security Update 2012-002) (BEAST)	Nessus	MacOS X Local Security Checks	critical
58767	SuSE 11.2 Security Update : Samba (SAT Patch Number 6145)	Nessus	SuSE Local Security Checks	critical
58327	Samba 'AndX' Request Heap-Based Buffer Overflow	Nessus	Misc.	critical
58299	SuSE 10 Security Update : Samba (ZYPP Patch Number 7985)	Nessus	SuSE Local Security Checks	high
58131	Ubuntu 8.04 LTS : samba vulnerability (USN-1374-1)	Nessus	Ubuntu Local Security Checks	high
58111	RHEL 4 / 5 : samba (RHSA-2012:0332)	Nessus	Red Hat Local Security Checks	critical
58109	CentOS 4 : samba (CESA-2012:0332)	Nessus	CentOS Local Security Checks	high

Detections

Analytics

CVE-2012-0870

critical

Tenable Plugins

high

high

critical

critical

high

high

critical

critical

critical

critical

high

high

critical

high