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AUSCERT Security Bulletin
ASB-2013.0029
A number of vulnerabilities have been identified in 3S
CODESYS Gateway-Server prior to version 2.3.9.27
25 February 2013
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: 3S CODESYS Gateway-Server
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2012-4708 CVE-2012-4707 CVE-2012-4706
CVE-2012-4705 CVE-2012-4704
Member content until: Wednesday, March 27 2013
OVERVIEW
A number of vulnerabilities have been identified in 3S CODESYS
Gateway-Server prior to version 2.3.9.27. [1]
IMPACT
ICS-CERT has provided the following details regarding these
vulnerabilities:
"IMPROPER ACCESS OF INDEXABLE RESOURCE (RANGE ERROR)
The 3S CODESYS Gateway-Server performs operations on a memory
buffer, but it can read from or write to a memory location that is
outside of the intended boundary of the buffer. This could allow the
attacker to send a specially crafted packet over TCP/1211 to cause a
crash, read from unintended memory locations, or execute arbitrary
code stored in a separate memory location.
CVE-2012-4704 has been assigned to this vulnerability. A CVSS v2
base score of 9.4 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:N/A:C)." [1]
"DIRECTORY OR PATH TRAVERSAL
The 3S CODESYS Gateway-Server uses external input to construct a
pathname that is intended to identify a file or directory that is
located underneath a restricted parent directory. However, the
software does not properly neutralize special elements within the
pathname that can cause the pathname to resolve to a location
outside the restricted directory. An attacker can use a specially
crafted directory path to exploit this vulnerability.
CVE-2012-4705 has been assigned to this vulnerability. A CVSS v2
base score of 10.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:C/A:C)." [1]
"HEAP-BASED BUFFER OVERFLOW
The 3S CODESYS Gateway-Server fails to check for a signed value that
could lead to the buffer being overwritten with malicious code. This
vulnerability is exploited by sending a specially crafted packet
over TCP/1211 affecting the availability of the system.
CVE-2012-4706 has been assigned to this vulnerability. A CVSS v2
base score of 7.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:N/I:N/A:C)." [1]
"IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY
BUFFER
The 3S CODESYS Gateway-Server can read or write to a memory location
that is outside the intended boundary of the buffer. As a result, an
attacker may execute arbitrary code, alter the intended control
flow, read sensitive information, or cause a system crash.
CVE-2012-4707 has been assigned to this vulnerability.
A CVSS v2 base score of 7.8 has been assigned; the CVSS vector
string is (AV:N/AC:L/Au:N/C:N/I:N/A:C)." [1]
"STACK-BASED BUFFER OVERFLOW
By sending a specially crafted packet to the 3S CODESYS
Gateway-Server over Port TCP/1211, an attacker can cause a
stack-based buffer overflow. This condition could allow an attacker
to cause a system crash or denial of service.
CVE-2012-4708 has been assigned to this vulnerability. A CVSS v2
base score of 10 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:C/A:C)." [1]
MITIGATION
ICS-CERT recommends that administrators apply the security patch
available from the download site for CODESYS at
http://www.codesys.com/download.html
REFERENCES
[1] ICSA-13-050-01 - 3S CODESYS GATEWAY-SERVER MULTIPLE VULNERABILITIES
http://ics-cert.us-cert.gov/pdf/ICSA-13-050-01.pdf
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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