CVE-2008-2639

Current Description

Stack-based buffer overflow in the ODBC server service in Citect CitectSCADA 6 and 7, and CitectFacilities 7, allows remote attackers to execute arbitrary code via a long string in the second application packet in a TCP session on port 20222.

Evaluator Description

The access complexity for this vulnerability is set at High due to the fact that exploiting this vulnerability requires the SCADA system to be connected to the internet and the client needs to be using ODBC technology. SCADA systems are not typically installed to connect to the internet for security purposes. While the vendor acknowledges that this vulnerability exists and will provide a patch upon request, they point out that this can be easily mitigated by ensuring SCADA systems (not limited to Citect products) are not connected to the internet.

Evaluator Solution

The vulnerability found in CitectSCADA could allow a remote un-authenticated attacker to force an abnormal termination of the vulnerable software (Denial of Service) or to execute arbitrary code on vulnerable systems to gain complete control of the software. The CitectSCADA and CitectFacilities applications include ODBC server capabilities to provide remote SQL access to a relational database. For that purpose, an ODBC Server component is used to service requests from clients on TCP/IP networks. Requests are serviced over a TCP high-port in which the application layer protocol reads an initial packet that specifies the length of data and then a second packet of data, of the same length is then read. Once the data is read from the network, it is then copied to an internal buffer of fixed size allocated in the stack without previously verifying that the buffer is big enough to store all the read data.The vulnerability is related to a lack of a proper length-checking on data read from the network. A specially crafted combination of length and data packets could be used to exploit the vulnerability allowing an un-authenticated attacker to execute arbitrary code on vulnerable systems.The bug is a texbook example of classic simple stack-based buffer overflow vulnerabilities of the 1990s that can be exploited by overwriting the return address of the currently running thread.Fixes and Workarounds:User organizations should deploy the vendor patch, which is available upon request at http://www.citect.com/ or disable the vulnerable service (ODBC server) if it is not needed in their particular installation.

Basic Data

PublishedJune 16, 2008
Last ModifiedOctober 11, 2018
Assignercve@mitre.org
Data TypeCVE
Data FormatMITRE
Data Version4.0
Problem TypeCWE-119
CVE Data Version4.0

Base Metric V2

CVSS 2 - Version2.0
CVSS 2 - Vector StringAV:N/AC:H/Au:N/C:C/I:C/A:C
CVSS 2 - Access VectorNETWORK
CVSS 2 - Access ComplexityHIGH
CVSS 2 - AuthenticationNONE
CVSS 2 - Confidentiality ImpactCOMPLETE
CVSS 2 - Availability ImpactCOMPLETE
CVSS 2 - Base Score7.6
SeverityHIGH
Exploitability Score4.9
Impact Score10.0
Obtain All Privilegefalse
Obtain User Privilegefalse
Obtain Other Privilegefalse

Base Metric V3

No data provided.

Configurations

  • OR - Configuration 1
    Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
    2.3ApplicationCitectCitectfacilities7*******
    2.3ApplicationCitectCitectscada6*******
    2.3ApplicationCitectCitectscada7*******

Vulnerable Software List

VendorProductVersions
Citect Citectfacilities 7
Citect Citectscada 6, 7

References

NameSourceURLTags
http://isc.sans.org/diary.html?storyid=4556http://isc.sans.org/diary.html?storyid=4556MISC
30638http://secunia.com/advisories/30638SECUNIAVendor Advisory
3944http://securityreason.com/securityalert/3944SREASON
1020241http://securitytracker.com/id?1020241SECTRACK
http://www.coresecurity.com/?action=item&id=2186http://www.coresecurity.com/?action=item&id=2186MISC
VU#476345http://www.kb.cert.org/vuls/id/476345CERT-VNUS Government Resource
http://www.kb.cert.org/vuls/id/CTAR-7ENQNHhttp://www.kb.cert.org/vuls/id/CTAR-7ENQNHCONFIRM
20080611 CORE-2008-0125: CitectSCADA ODBC service vulnerabilityhttp://www.securityfocus.com/archive/1/493272/100/0/threadedBUGTRAQ
29634http://www.securityfocus.com/bid/29634BID
ADV-2008-1834http://www.vupen.com/english/advisories/2008/1834/referencesVUPEN
citectscada-odbc-bo(42992)https://exchange.xforce.ibmcloud.com/vulnerabilities/42992XF
6387https://www.exploit-db.com/exploits/6387EXPLOIT-DB