From snsadv@lac.co.jp Thu Jun 28 17:28:03 2001 From: SNS Advisory To: BUGTRAQ Date: Thu, 28 Jun 2001 17:33:46 +0900 Subject: [SNS Advisory No.35] TrendMicro InterScan VirusWall 3.51 HttpSaveC*P.dll Buffer Overflow SNS Advisory No.35 TrendMicro InterScan VirusWall 3.51 HttpSaveC*P.dll Buffer Overflow Problem first discovered: Wed, 6 Jun 2001 Published: Thu, 28 Jun 2001 ---------------------------------------------------------------------- Overview: --------- A buffer overflow vulnerability was found in some administrative programs, smtpscan.dll, of InterScan VirusWall for Windows NT. It allows a remote user to execute an arbitrary command with SYSTEM privilege. If long strings are included in a certain parameter of configuration by exploiting the vulnerability that was reported by SNS Advisory No.28, a buffer overflow occurs when requesting the following dll(s): http://server/interscan/cgi-bin/HttpSaveCVP.dll http://server/interscan/cgi-bin/HttpSaveCSP.dll The following are a memory dump and contents of register when a buffer overflow occurs. dump: 023FFAC2 6D 6D 6D 6E 6E 6E mmmnnn 023FFAC8 6F 6F 6F 70 70 70 oooppp register: EAX = 023FFAC8 EIP = 6E6E6E6D Therefore, arbitrary code may be executed by calling eax which may be replaced by an attacker's supplied arbitrary code. Tested Version: --------------- InterScan VirusWall for Windows NT 3.51 build 1321 English Tested OS: ---------- Windows NT 4.0 Server SP6a [English Version] Patch Information: ------------------ To get the patch, send e-mail to support@support.trendmicro.com or search this issue on http://solutionbank.antivirus.com/solutions/solutionSearch.asp Discovered by: -------------- Nobuo Miwa (LAC / n-miwa@lac.co.jp) Disclaimer: ----------- All information in these advisories are subject to change without any advanced notices neither mutual consensus, and each of them is released as it is. LAC Co.,Ltd. is not responsible for any risks of occurrences caused by applying those information. References ---------- Archive of this advisory: http://www.lac.co.jp/security/english/snsadv_e/35_e.html SNS Advisory No.28(TrendMicro InterScan VirusWall for NT remote configuration Vulnerability) http://www.lac.co.jp/security/english/snsadv_e/28_e.html SNS Advisory: http://www.lac.co.jp/security/english/snsadv_e/ LAC: http://www.lac.co.jp/security/english/ ------------------------------------------------------------------ Secure Net Service(SNS) Security Advisory Computer Security Laboratory, LAC http://www.lac.co.jp/security/