smbfs in Samba 3.5.8 and earlier attempts to use (1) mount.cifs to append to the /etc/mtab file and (2) umount.cifs to append to the /etc/mtab.tmp file without first checking whether resource limits would interfere, which allows local users to trigger corruption of the /etc/mtab file via a process with a small RLIMIT_FSIZE value, a related issue to CVE-2011-1089.

The remote VMware ESX / ESXi host is missing a security-related patch.
It is, therefore, affected by multiple vulnerabilities, including remote code execution vulnerabilities, in several third-party libraries :

  - COS kernel
  - cURL
  - python
  - rpm

From Red Hat Security Advisory 2011:1221 :

Updated samba and cifs-utils packages that fix multiple security issues and one bug are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Samba is a suite of programs used by machines to share files, printers, and other information. The cifs-utils package contains utilities for mounting and managing CIFS (Common Internet File System) shares.

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

It was found that the fix for CVE-2010-0547, provided in the cifs-utils package included in the GA release of Red Hat Enterprise Linux 6, was incomplete. The mount.cifs tool did not properly handle share or directory names containing a newline character, allowing a local attacker to corrupt the mtab (mounted file systems table) file via a specially crafted CIFS share mount request, if mount.cifs had the setuid bit set. (CVE-2011-2724)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the cifs-utils package distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Red Hat would like to thank the Samba project for reporting CVE-2011-2694 and CVE-2011-2522, and Dan Rosenberg for reporting CVE-2011-1678. Upstream acknowledges Nobuhiro Tsuji of NTT DATA Security Corporation as the original reporter of CVE-2011-2694, and Yoshihiro Ishikawa of LAC Co., Ltd. as the original reporter of CVE-2011-2522.

This update also fixes the following bug :

* If plain text passwords were used ('encrypt passwords = no' in '/etc/samba/smb.conf'), Samba clients running the Windows XP or Windows Server 2003 operating system may not have been able to access Samba shares after installing the Microsoft Security Bulletin MS11-043. This update corrects this issue, allowing such clients to use plain text passwords to access Samba shares. (BZ#728517)

Users of samba and cifs-utils are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.
After installing this update, the smb service will be restarted automatically.

From Red Hat Security Advisory 2011:1220 :

Updated samba3x packages that fix multiple security issues are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

It was found that the fix for CVE-2010-0547, provided by the Samba rebase in RHBA-2011:0054, was incomplete. The mount.cifs tool did not properly handle share or directory names containing a newline character, allowing a local attacker to corrupt the mtab (mounted file systems table) file via a specially crafted CIFS (Common Internet File System) share mount request, if mount.cifs had the setuid bit set.
(CVE-2011-2724)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the samba3x packages distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Red Hat would like to thank the Samba project for reporting CVE-2011-2694 and CVE-2011-2522, and Dan Rosenberg for reporting CVE-2011-1678. Upstream acknowledges Nobuhiro Tsuji of NTT DATA Security Corporation as the original reporter of CVE-2011-2694, and Yoshihiro Ishikawa of LAC Co., Ltd. as the original reporter of CVE-2011-2522.

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

From Red Hat Security Advisory 2011:1219 :

Updated samba packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

A race condition flaw was found in the way the mount.cifs tool mounted CIFS (Common Internet File System) shares. If mount.cifs had the setuid bit set, a local attacker could conduct a symbolic link attack to trick mount.cifs into mounting a share over an arbitrary directory they were otherwise not allowed to mount to, possibly allowing them to escalate their privileges. (CVE-2010-0787)

It was found that the mount.cifs tool did not properly handle share or directory names containing a newline character. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab (mounted file systems table) file via a specially crafted CIFS share mount request.
(CVE-2010-0547)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the samba packages distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Red Hat would like to thank the Samba project for reporting CVE-2011-2694 and CVE-2011-2522; the Debian Security Team for reporting CVE-2010-0787; and Dan Rosenberg for reporting CVE-2011-1678. Upstream acknowledges Nobuhiro Tsuji of NTT DATA Security Corporation as the original reporter of CVE-2011-2694;
Yoshihiro Ishikawa of LAC Co., Ltd. as the original reporter of CVE-2011-2522; and the Debian Security Team acknowledges Ronald Volgers as the original reporter of CVE-2010-0787.

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

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

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

A race condition flaw was found in the way the mount.cifs tool mounted CIFS (Common Internet File System) shares. If mount.cifs had the setuid bit set, a local attacker could conduct a symbolic link attack to trick mount.cifs into mounting a share over an arbitrary directory they were otherwise not allowed to mount to, possibly allowing them to escalate their privileges. (CVE-2010-0787)

It was found that the mount.cifs tool did not properly handle share or directory names containing a newline character. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab (mounted file systems table) file via a specially crafted CIFS share mount request.
(CVE-2010-0547)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the samba packages distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

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

Samba is a suite of programs used by machines to share files, printers, and other information. The cifs-utils package contains utilities for mounting and managing CIFS (Common Internet File System) shares.

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

It was found that the fix for CVE-2010-0547, provided in the cifs-utils package included in the GA release of Scientific Linux 6, was incomplete. The mount.cifs tool did not properly handle share or directory names containing a newline character, allowing a local attacker to corrupt the mtab (mounted file systems table) file via a specially crafted CIFS share mount request, if mount.cifs had the setuid bit set. (CVE-2011-2724)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the cifs-utils package distributed by Scientific Linux does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

This update also fixes the following bug :

  - If plain text passwords were used ('encrypt passwords =     no' in '/etc/samba/smb.conf'), Samba clients running the     Windows XP or Windows Server 2003 operating system may     not have been able to access Samba shares after     installing the Microsoft Security Bulletin MS11-043.
    This update corrects this issue, allowing such clients     to use plain text passwords to access Samba shares.

Users of samba and cifs-utils are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.
After installing this update, the smb service will be restarted automatically.

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

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

It was found that the fix for CVE-2010-0547 was incomplete. The mount.cifs tool did not properly handle share or directory names containing a newline character, allowing a local attacker to corrupt the mtab (mounted file systems table) file via a specially crafted CIFS (Common Internet File System) share mount request, if mount.cifs had the setuid bit set. (CVE-2011-2724)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the samba3x packages distributed by Scientific Linux does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Users of Samba are advised to upgrade to these updated packages, which contain backported patches to resolve these issues. 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.

a. ESX third-party update for Service Console kernel      The ESX Service Console Operating System (COS) kernel is updated to    kernel-2.6.18-274.3.1.el5 to fix multiple security issues in the    COS kernel.
     The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2011-0726, CVE-2011-1078, CVE-2011-1079,    CVE-2011-1080, CVE-2011-1093, CVE-2011-1163, CVE-2011-1166,    CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-1494,    CVE-2011-1495, CVE-2011-1577, CVE-2011-1763, CVE-2010-4649,    CVE-2011-0695, CVE-2011-0711, CVE-2011-1044, CVE-2011-1182,    CVE-2011-1573, CVE-2011-1576, CVE-2011-1593, CVE-2011-1745,    CVE-2011-1746, CVE-2011-1776, CVE-2011-1936, CVE-2011-2022,    CVE-2011-2213, CVE-2011-2492, CVE-2011-1780, CVE-2011-2525,    CVE-2011-2689, CVE-2011-2482, CVE-2011-2491, CVE-2011-2495,    CVE-2011-2517, CVE-2011-2519, CVE-2011-2901 to these issues.
  b. ESX third-party update for Service Console cURL RPM      The ESX Service Console (COS) curl RPM is updated to cURL-7.15.5.9    resolving a security issues.
     The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the name CVE-2011-2192 to this issue.
  c. ESX third-party update for Service Console nspr and nss RPMs      The ESX Service Console (COS) nspr and nss RPMs are updated to    nspr-4.8.8-1.el5_7 and nss-3.12.10-4.el5_7 respectively resolving    a security issues.
     A Certificate Authority (CA) issued fraudulent SSL certificates and    Netscape Portable Runtime (NSPR) and Network Security Services (NSS)    contain the built-in tokens of this fraudulent Certificate    Authority. This update renders all SSL certificates signed by the    fraudulent CA as untrusted for all uses.
  d. ESX third-party update for Service Console rpm RPMs      The ESX Service Console Operating System (COS) rpm packages are    updated to popt-1.10.2.3-22.el5_7.2, rpm-4.4.2.3-22.el5_7.2,    rpm-libs-4.4.2.3-22.el5_7.2 and rpm-python-4.4.2.3-22.el5_7.2    which fixes multiple security issues.
     The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2010-2059 and CVE-2011-3378 to these    issues.
  e. ESX third-party update for Service Console samba RPMs      The ESX Service Console Operating System (COS) samba packages are    updated to samba-client-3.0.33-3.29.el5_7.4,    samba-common-3.0.33-3.29.el5_7.4 and    libsmbclient-3.0.33-3.29.el5_7.4 which fixes multiple security    issues in the Samba client.
     The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2010-0547, CVE-2010-0787, CVE-2011-1678,    CVE-2011-2522 and CVE-2011-2694 to these issues.
     Note that ESX does not include the Samba Web Administration Tool    (SWAT) and therefore ESX COS is not affected by CVE-2011-2522 and    CVE-2011-2694.
  f. ESX third-party update for Service Console python package      The ESX Service Console (COS) python package is updated to    2.4.3-44 which fixes multiple security issues.
     The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2009-3720, CVE-2010-3493, CVE-2011-1015 and    CVE-2011-1521 to these issues.
  g. ESXi update to third-party component python      The python third-party library is updated to python 2.5.6 which    fixes multiple security issues.
     The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2009-3560, CVE-2009-3720, CVE-2010-1634,    CVE-2010-2089, and CVE-2011-1521 to these issues.

Multiple vulnerabilities has been discovered and corrected in samba/cifs-utils :

smbfs in Samba 3.5.8 and earlier attempts to use (1) mount.cifs to append to the /etc/mtab file and (2) umount.cifs to append to the /etc/mtab.tmp file without first checking whether resource limits would interfere, which allows local users to trigger corruption of the /etc/mtab file via a process with a small RLIMIT_FSIZE value, a related issue to CVE-2011-1089 (CVE-2011-1678).

The check_mtab function in client/mount.cifs.c in mount.cifs in smbfs in Samba 3.5.10 and earlier does not properly verify that the (1) device name and (2) mountpoint strings are composed of valid characters, which allows local users to cause a denial of service (mtab corruption) via a crafted string. NOTE: this vulnerability exists because of an incorrect fix for CVE-2010-0547 (CVE-2011-2724).

Additionally for Mandriva Linux 2010.2 the cifs-utils package has been upgraded to the 4.8.1 version that brings numerous additional fixes.

Packages for 2009.0 are provided as of the Extended Maintenance Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149 products_id=490

The updated packages have been patched to correct these issues.

Dan Rosenberg discovered that cifs-utils incorrectly handled changes to the mtab file. A local attacker could use this issue to corrupt the mtab file, possibly leading to a denial of service. (CVE-2011-1678)

Jan Lieskovsky discovered that cifs-utils incorrectly filtered certain strings being added to the mtab file. A local attacker could use this issue to corrupt the mtab file, possibly leading to a denial of service. (CVE-2011-2724).

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.

Dan Rosenberg discovered that Samba incorrectly handled changes to the mtab file. A local attacker could use this issue to corrupt the mtab file, possibly leading to a denial of service. (CVE-2011-1678)

Jan Lieskovsky discovered that Samba incorrectly filtered certain strings being added to the mtab file. A local attacker could use this issue to corrupt the mtab file, possibly leading to a denial of service. This issue only affected Ubuntu 10.04 LTS. (CVE-2011-2724)

Dan Rosenberg discovered that Samba incorrectly handled the mtab lock file. A local attacker could use this issue to create a stale lock file, possibly leading to a denial of service. (CVE-2011-3585).

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.

Updated samba3x packages that fix multiple security issues are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

It was found that the fix for CVE-2010-0547, provided by the Samba rebase in RHBA-2011:0054, was incomplete. The mount.cifs tool did not properly handle share or directory names containing a newline character, allowing a local attacker to corrupt the mtab (mounted file systems table) file via a specially crafted CIFS (Common Internet File System) share mount request, if mount.cifs had the setuid bit set.
(CVE-2011-2724)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the samba3x packages distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Red Hat would like to thank the Samba project for reporting CVE-2011-2694 and CVE-2011-2522, and Dan Rosenberg for reporting CVE-2011-1678. Upstream acknowledges Nobuhiro Tsuji of NTT DATA Security Corporation as the original reporter of CVE-2011-2694, and Yoshihiro Ishikawa of LAC Co., Ltd. as the original reporter of CVE-2011-2522.

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

Updated samba and cifs-utils packages that fix multiple security issues and one bug are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Samba is a suite of programs used by machines to share files, printers, and other information. The cifs-utils package contains utilities for mounting and managing CIFS (Common Internet File System) shares.

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

It was found that the fix for CVE-2010-0547, provided in the cifs-utils package included in the GA release of Red Hat Enterprise Linux 6, was incomplete. The mount.cifs tool did not properly handle share or directory names containing a newline character, allowing a local attacker to corrupt the mtab (mounted file systems table) file via a specially crafted CIFS share mount request, if mount.cifs had the setuid bit set. (CVE-2011-2724)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the cifs-utils package distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Red Hat would like to thank the Samba project for reporting CVE-2011-2694 and CVE-2011-2522, and Dan Rosenberg for reporting CVE-2011-1678. Upstream acknowledges Nobuhiro Tsuji of NTT DATA Security Corporation as the original reporter of CVE-2011-2694, and Yoshihiro Ishikawa of LAC Co., Ltd. as the original reporter of CVE-2011-2522.

This update also fixes the following bug :

* If plain text passwords were used ('encrypt passwords = no' in '/etc/samba/smb.conf'), Samba clients running the Windows XP or Windows Server 2003 operating system may not have been able to access Samba shares after installing the Microsoft Security Bulletin MS11-043. This update corrects this issue, allowing such clients to use plain text passwords to access Samba shares. (BZ#728517)

Users of samba and cifs-utils are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.
After installing this update, the smb service will be restarted automatically.

Updated samba packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

A cross-site scripting (XSS) flaw was found in the password change page of the Samba Web Administration Tool (SWAT). If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, it would lead to arbitrary web script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site Request Forgery (CSRF) attacks. If a remote attacker could trick a user, who was logged into the SWAT interface, into visiting a specially crafted URL, the attacker could perform Samba configuration changes with the privileges of the logged in user. (CVE-2011-2522)

A race condition flaw was found in the way the mount.cifs tool mounted CIFS (Common Internet File System) shares. If mount.cifs had the setuid bit set, a local attacker could conduct a symbolic link attack to trick mount.cifs into mounting a share over an arbitrary directory they were otherwise not allowed to mount to, possibly allowing them to escalate their privileges. (CVE-2010-0787)

It was found that the mount.cifs tool did not properly handle share or directory names containing a newline character. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab (mounted file systems table) file via a specially crafted CIFS share mount request.
(CVE-2010-0547)

It was found that the mount.cifs tool did not handle certain errors correctly when updating the mtab file. If mount.cifs had the setuid bit set, a local attacker could corrupt the mtab file by setting a small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the samba packages distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.

Red Hat would like to thank the Samba project for reporting CVE-2011-2694 and CVE-2011-2522; the Debian Security Team for reporting CVE-2010-0787; and Dan Rosenberg for reporting CVE-2011-1678. Upstream acknowledges Nobuhiro Tsuji of NTT DATA Security Corporation as the original reporter of CVE-2011-2694;
Yoshihiro Ishikawa of LAC Co., Ltd. as the original reporter of CVE-2011-2522; and the Debian Security Team acknowledges Ronald Volgers as the original reporter of CVE-2010-0787.

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

This update fixes an issue where /etc/mtab could be left in a corrupt state after mounting.

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

ID	Name	Product	Family	Severity
89105	VMware ESX / ESXi Service Console and Third-Party Libraries Multiple Vulnerabilities (VMSA-2012-0001) (remote check)	Nessus	Misc.	high
68337	Oracle Linux 6 : cifs-utils / samba (ELSA-2011-1221)	Nessus	Oracle Linux Local Security Checks	medium
68336	Oracle Linux 5 : samba3x (ELSA-2011-1220)	Nessus	Oracle Linux Local Security Checks	medium
68335	Oracle Linux 4 / 5 : samba (ELSA-2011-1219)	Nessus	Oracle Linux Local Security Checks	medium
61123	Scientific Linux Security Update : samba on SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
61122	Scientific Linux Security Update : samba and cifs-utils on SL6.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
61121	Scientific Linux Security Update : samba3x on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
59675	GLSA-201206-22 : Samba: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
57749	VMSA-2012-0001 : VMware ESXi and ESX updates to third-party library and ESX Service Console	Nessus	VMware ESX Local Security Checks	high
56462	Mandriva Linux Security Advisory : samba (MDVSA-2011:148)	Nessus	Mandriva Local Security Checks	low
56390	Ubuntu 10.10 / 11.04 : cifs-utils vulnerabilities (USN-1226-2)	Nessus	Ubuntu Local Security Checks	low
56389	Ubuntu 8.04 LTS / 10.04 LTS : samba vulnerabilities (USN-1226-1)	Nessus	Ubuntu Local Security Checks	medium
56272	CentOS 5 : samba3x (CESA-2011:1220)	Nessus	CentOS Local Security Checks	medium
56001	RHEL 6 : samba and cifs-utils (RHSA-2011:1221)	Nessus	Red Hat Local Security Checks	medium
56000	RHEL 5 : samba3x (RHSA-2011:1220)	Nessus	Red Hat Local Security Checks	medium
55999	RHEL 4 / 5 : samba (RHSA-2011:1219)	Nessus	Red Hat Local Security Checks	medium
55997	CentOS 4 / 5 : samba (CESA-2011:1219)	Nessus	CentOS Local Security Checks	medium
55658	Fedora 14 : cifs-utils-4.8.1-6.fc14 (2011-9269)	Nessus	Fedora Local Security Checks	low

Detections

Analytics

CVE-2011-1678

critical

Tenable Plugins

high

medium

medium

medium

medium

medium

medium

critical

high

low

low

medium

medium

medium

medium

medium

medium

low