---------------------------------------------------------------------- Meet Secunia @ Microsoft Management Summit (MMS) in Las Vegas, USA (21-25 March). http://secunia.com/company/events/mms_2011/ ---------------------------------------------------------------------- TITLE: RealWin FlexWin Connection Packet Processing Buffer Overflow Vulnerabilities SECUNIA ADVISORY ID: SA43848 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/43848/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=43848 RELEASE DATE: 2011-03-22 DISCUSS ADVISORY: http://secunia.com/advisories/43848/#comments AVAILABLE ON SITE AND IN CUSTOMER AREA: * Last Update * Popularity * Comments * Criticality Level * Impact * Where * Solution Status * Operating System / Software * CVE Reference(s) http://secunia.com/advisories/43848/ ONLY AVAILABLE IN CUSTOMER AREA: * Authentication Level * Report Reliability * Secunia PoC * Secunia Analysis * Systems Affected * Approve Distribution * Remediation Status * Secunia CVSS Score * CVSS https://ca.secunia.com/?page=viewadvisory&vuln_id=43848 ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI: * AUTOMATED SCANNING http://secunia.com/vulnerability_scanning/personal/ http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/ DESCRIPTION: Luigi Auriemma has discovered multiple vulnerabilities in RealWin, which can be exploited by malicious people to compromise a vulnerable system. 1) A boundary error when processing "On_FC_CONNECT_FCS_LOGIN" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 2) A boundary error when processing "On_FC_CTAGLIST_FCS_CADDTAG", "On_FC_CTAGLIST_FCS_ADDTAGMS", and "On_FC_BINFILE_FCS_OPENREADFILE" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 3) A boundary error when processing "On_FC_CTAGLIST_FCS_CDELTAG" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 4) A boundary error when processing "On_FC_RFUSER_FCS_LOGIN" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 5) A boundary error when processing "On_FC_BINFILE_FCS_DIRLIST" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 6) An input validation error when processing "On_FC_MISC_FCS_MSGBROADCAST" packets can be exploited to cause a heap-based buffer overflow via a specially crafted packet sent to TCP port 910. 7) An input validation error when processing "On_FC_MISC_FCS_MSGSEND" packets can be exploited to cause a heap-based buffer overflow via a specially crafted packet sent to TCP port 910. 8) A boundary error when processing "On_FC_CGETTAG_FCS_GETTELEMETRY" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 9) A boundary error when processing "On_FC_CGETTAG_FCS_GETCHANNELTELEMETRY" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 10) A boundary error when processing "On_FC_CPUTTAG_FCS_SETTELEMETRY" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 11) A boundary error when processing "On_FC_CPUTTAG_FCS_SETCHANNELTELEMETRY" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. 12) A boundary error when processing "On_FC_SCRIPT_FCS_STARTPROG" packets can be exploited to cause a stack-based buffer overflow via a specially crafted packet sent to TCP port 910. Successful exploitation of the vulnerabilities allows execution of arbitrary code. The vulnerabilities are confirmed in version 2.1 Build 6.1.10.10. Other versions may also be affected. SOLUTION: Restrict access to trusted hosts only (e.g. via network access control lists). PROVIDED AND/OR DISCOVERED BY: Luigi Auriemma ORIGINAL ADVISORY: http://aluigi.altervista.org/adv/realwin_2-adv.txt http://aluigi.altervista.org/adv/realwin_3-adv.txt http://aluigi.altervista.org/adv/realwin_4-adv.txt http://aluigi.altervista.org/adv/realwin_5-adv.txt http://aluigi.altervista.org/adv/realwin_6-adv.txt http://aluigi.altervista.org/adv/realwin_7-adv.txt http://aluigi.altervista.org/adv/realwin_8-adv.txt OTHER REFERENCES: Further details available in Customer Area: http://secunia.com/products/corporate/EVM/ DEEP LINKS: Further details available in Customer Area: http://secunia.com/products/corporate/EVM/ EXTENDED DESCRIPTION: Further details available in Customer Area: http://secunia.com/products/corporate/EVM/ EXTENDED SOLUTION: Further details available in Customer Area: http://secunia.com/products/corporate/EVM/ EXPLOIT: Further details available in Customer Area: http://secunia.com/products/corporate/EVM/ ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help private users keeping their systems up to date against the latest vulnerabilities. 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