[NEWS] Multiple Issues in VMware ESX Server

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Multiple Issues in VMware ESX Server
------------------------------------------------------------------------


SUMMARY

Multiple vulnerabilities have been found in VMware's ESX Server, allowing
attackers to overflow internal buffers, disclose sensitive information on
the system via SSH, cause the Samba server to no longer respond, prevent
the SNMP from responding to legitimate traffic as well as execute
arbitrary code via the XFree86 system.

DETAILS

Vulnerable Systems:
* VMware ESX Server 2.5.4 prior to Upgrade Patch 1
* VMware ESX Server 2.1.3 prior to Upgrade Patch 2
* VMware ESX Server 2.5.3 prior to Upgrade Patch 4
* VMware ESX Server 2.0.2 prior to Upgrade Patch 2

Immune Systems:
* VMware ESX Server version 2.5.4 with
<http://www.vmware.com/download/esx/esx-254-200610-patch.html> Upgrade
Patch 1
* VMware ESX Server version 2.1.3
<http://www.vmware.com/download/esx/esx-213-200610-patch.html> Upgrade
Patch 2
* VMware ESX Server version 2.5.3 with
<http://www.vmware.com/download/esx/esx-253-200610-patch.html> Upgrade
Patch 4
* VMware ESX Server version 2.0.2 with
<http://www.vmware.com/download/esx/esx-202-200610-patch.html> Upgrade
Patch 2

VMware ESX Server 2.5.4 Patch 1 fixes the following:
ucd-snmp -- A denial of service bug was found in the way ucd-snmp uses
network stream protocols. A remote attacker could send a ucd-snmp agent a
specially crafted packet which will cause the agent to crash. The Common
Vulnerabilities and Exposures project (cve.mitre.org) assigned the name
CAN-2005-2177 to this issue.

XFree86 -- An integer overflow flaw in the way the XFree86 server
processes PCF font files was discovered. A malicious authorized client
could exploit this issue to cause a denial of service (crash) or
potentially execute arbitrary code with root privileges on the XFree86
server. The Common Vulnerabilities and Exposures project (cve.mitre.org)
assigned the name CVE-2006-3467 to this issue.

An AMD fxsave/restore security vulnerability. The instructions fxsave and
fxrstor on AMD CPUs are used to save or restore the FPU registers (FOP,
FIP and FDP). On AMD Opteron processors, these instructions do not
save/restore some exception related registers unless an exception is
currently being serviced. This could allow a local attacker to partially
monitor the execution path of FPU processes, possibly allowing them to
obtain sensitive information being passed through those processes. The
Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the
name CVE-2006-1056 to this issue.

A minor info leak in socket name handling in the network code
(CVE-2006-1342).
A minor info leak in socket option handling in the network code
(CVE-2006-1343).
A directory traversal vulnerability in smbfs that allowed a local user to
escape chroot restrictions for an SMB-mounted filesystem via "..\\"
sequences (CVE-2006-1864). A flaw in the mprotect system call that allowed
to give write permission to a readonly attachment of shared memory
(CVE-2006-2071).

The non-security-related fixes are documented on the patch download page.

VMware ESX Server 2.1.3 Patch 2 fixes the following:
Openssh -- A bug was found in the way the OpenSSH server handled the
MaxStartups and LoginGraceTime configuration variables. The Common
Vulnerabilities and Exposures project (cve.mitre.org) assigned the name
CAN-2004-2069 to this issue.

samba -- A denial of service bug was found in the way the smbd daemon
tracks active connections to shares. It was possible for a remote attacker
to cause the smbd daemon to consume a large amount of system memory by
sending carefully crafted smb requests. The Common Vulnerabilities and
Exposures project (cve.mitre.org) assigned the name CVE-2006-3403 to this
issue.

Python -- An integer overflow flaw was found in Python's PCRE library that
could be triggered by a maliciously crafted regular expression. On systems
that accept arbitrary regular expressions from untrusted users, this could
be exploited to execute arbitrary code with the privileges of the
application using the library. The Common Vulnerabilities and Exposures
project (cve.mitre.org) assigned the name CVE-2005-2491 to this issue.

ucd-snmp -- A denial of service bug was found in the way ucd-snmp uses
network stream protocols. A remote attacker could send a ucd-snmp agent a
specially crafted packet which will cause the agent to crash. The Common
Vulnerabilities and Exposures project (cve.mitre.org) assigned the name
CAN-2005-2177 to this issue.

XFree86 -- An integer overflow flaw in the way the XFree86 server
processes PCF font files was discovered. A malicious authorized client
could exploit this issue to cause a denial of service (crash) or
potentially execute arbitrary code with root privileges on the XFree86
server. The Common Vulnerabilities and Exposures project (cve.mitre.org)
assigned the name CVE-2006-3467 to this issue.

An AMD fxsave/restore security vulnerability. The instructions fxsave and
fxrstor on AMD CPUs are used to save or restore the FPU registers (FOP,
FIP and FDP). On AMD Opteron processors, these instructions do not
save/restore some exception related registers unless an exception is
currently being serviced. This could allow a local attacker to partially
monitor the execution path of FPU processes, possibly allowing them to
obtain sensitive information being passed through those processes. The
Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the
name CVE-2006-1056 to this issue.

A minor info leak in socket name handling in the network code
(CVE-2006-1342).
A minor info leak in socket option handling in the network code
(CVE-2006-1343). A directory traversal vulnerability in smbfs that allowed
a local user to escape chroot restrictions for an SMB-mounted filesystem
via "..\\" sequences (CVE-2006-1864).
A flaw in the mprotect system call that allowed to give write permission
to a readonly attachment of shared memory (CVE-2006-2071).

The non-security-related fixes are documented on the patch download page.

VMware ESX Server 2.5.3 Upgrade Patch 4 fixes the following:
Openssh -- A bug was found in the way the OpenSSH server handled the
MaxStartups and LoginGraceTime configuration variables. The Common
Vulnerabilities and Exposures project (cve.mitre.org) assigned the name
CAN-2004-2069 to this issue.

samba -- A denial of service bug was found in the way the smbd daemon
tracks active connections to shares. It was possible for a remote attacker
to cause the smbd daemon to consume a large amount of system memory by
sending carefully crafted smb requests. The Common Vulnerabilities and
Exposures project (cve.mitre.org) assigned the name CVE-2006-3403 to this
issue.

Python -- An integer overflow flaw was found in Python's PCRE library that
could be triggered by a maliciously crafted regular expression. On systems
that accept arbitrary regular expressions from untrusted users, this could
be exploited to execute arbitrary code with the privileges of the
application using the library. The Common Vulnerabilities and Exposures
project (cve.mitre.org) assigned the name CVE-2005-2491 to this issue.

ucd-snmp -- A denial of service bug was found in the way ucd-snmp uses
network stream protocols. A remote attacker could send a ucd-snmp agent a
specially crafted packet which will cause the agent to crash. The Common
Vulnerabilities and Exposures project (cve.mitre.org) assigned the name
CAN-2005-2177 to this issue.

XFree86 -- An integer overflow flaw in the way the XFree86 server
processes PCF font files was discovered. A malicious authorized client
could exploit this issue to cause a denial of service (crash) or
potentially execute arbitrary code with root privileges on the XFree86
server. The Common Vulnerabilities and Exposures project (cve.mitre.org)
assigned the name CVE-2006-3467 to this issue.

An AMD fxsave/restore security vulnerability. The instructions fxsave and
fxrstor on AMD CPUs are used to save or restore the FPU registers (FOP,
FIP and FDP). On AMD Opteron processors, these instructions do not
save/restore some exception related registers unless an exception is
currently being serviced. This could allow a local attacker to partially
monitor the execution path of FPU processes, possibly allowing them to
obtain sensitive information being passed through those processes. The
Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the
name CVE-2006-1056 to this issue.

A minor info leak in socket name handling in the network code
(CVE-2006-1342).
A minor info leak in socket option handling in the network code
(CVE-2006-1343).
A directory traversal vulnerability in smbfs that allowed a local user to
escape chroot restrictions for an SMB-mounted filesystem via "..\\"
sequences (CVE-2006-1864).
A flaw in the mprotect system call that allowed to give write permission
to a readonly attachment of shared memory (CVE-2006-2071).

The non-security-related fixes are documented on the patch download page.

VMware ESX Server 2.0.2 Upgrade Patch 2 fixes the following:
Openssh -- A bug was found in the way the OpenSSH server handled the
MaxStartups and LoginGraceTime configuration variables. The Common
Vulnerabilities and Exposures project (cve.mitre.org) assigned the name
CAN-2004-2069 to this issue.

samba -- A denial of service bug was found in the way the smbd daemon
tracks active connections to shares. It was possible for a remote attacker
to cause the smbd daemon to consume a large amount of system memory by
sending carefully crafted smb requests. The Common Vulnerabilities and
Exposures project (cve.mitre.org) assigned the name CVE-2006-3403 to this
issue.

Python -- An integer overflow flaw was found in Python's PCRE library that
could be triggered by a maliciously crafted regular expression. On systems
that accept arbitrary regular expressions from untrusted users, this could
be exploited to execute arbitrary code with the privileges of the
application using the library. The Common Vulnerabilities and Exposures
project (cve.mitre.org) assigned the name CVE-2005-2491 to this issue.

ucd-snmp -- A denial of service bug was found in the way ucd-snmp uses
network stream protocols. A remote attacker could send a ucd-snmp agent a
specially crafted packet which will cause the agent to crash. The Common
Vulnerabilities and Exposures project (cve.mitre.org) assigned the name
CAN-2005-2177 to this issue.

XFree86 -- An integer overflow flaw in the way the XFree86 server
processes PCF font files was discovered. A malicious authorized client
could exploit this issue to cause a denial of service (crash) or
potentially execute arbitrary code with root privileges on the XFree86
server. The Common Vulnerabilities and Exposures project (cve.mitre.org)
assigned the name CVE-2006-3467 to this issue.

A minor info leak in socket name handling in the network code
(CVE-2006-1342).
A minor info leak in socket option handling in the network code
(CVE-2006-1343).
A directory traversal vulnerability in smbfs that allowed a local user to
escape chroot restrictions for an SMB-mounted filesystem via "..\\"
sequences (CVE-2006-1864).
A flaw in the mprotect system call that allowed to give write permission
to a readonly attachment of shared memory (CVE-2006-2071).

NOTE: AMD processers were not supported in the VMware ESX 2.0.2 release so
CVE-2006-1056 is not applicable to this version of the product.

The non-security-related fixes are documented on the patch download page.


ADDITIONAL INFORMATION

The information has been provided by <mailto:security@xxxxxxxxxx> VMware
Security team.



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