Microsoft Internet Explorer Gopher client malformed reply buffer overflow

ie-gopher-bo (9247)

High Risk

Description:

The Gopher protocol is vulnerable to a buffer overflow in the built-in Gopher client. A remote attacker could exploit this vulnerability by creating a Web page or an HTML email that redirects a victim to a malicious Gopher server, which could be used to overflow a buffer in the code in Internet Explorer that handles Gopher replies. An attacker could use this vulnerability to execute arbitrary code and gain complete control of the victim's computer.

Consequences:

Gain Access

Remedy:

Apply the appropriate patch for your system, as listed in the latest Microsoft Security Bulletin. See References.

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.

References:

• BugTraq Mailing List, Tue Jun 04 2002 - 08:07:34 CDT: Buffer overflow in MSIE gopher code.
• CIAC Information Bulletin M-088: MS Unchecked Buffer in Gopher Protocol Handler.
• CIAC Information Bulletin M-116: Microsoft Cumulative Patch for Internet Explorer.
• Microsoft Knowledge Base Article 328548: How to Obtain the Latest Service Pack for Internet Explorer 6.
• Microsoft Product Support Services: List of Fixes in Microsoft Internet Explorer 6 SP1.
• Microsoft Security Bulletin MS02-027: Unchecked Buffer in Gopher Protocol Handler Can Run Code of Attacker's Choice (Q323889).
• Microsoft Security Bulletin MS02-047: Cumulative Patch for Internet Explorer (Q323759).
• Microsoft Security Bulletin MS02-066: Cumulative Patch for Internet Explorer (Q328970).
• Microsoft Security Bulletin MS02-068: Cumulative Patch for Internet Explorer (324929).
• Microsoft Security Bulletin MS03-004: Cumulative Patch for Internet Explorer (810847).
• Microsoft Security Bulletin MS03-015: Cumulative Patch for Internet Explorer (813489).
• Microsoft Security Bulletin MS03-020: Cumulative Patch for Internet Explorer (818529).
• Microsoft Security Bulletin MS03-032: Cumulative Patch for Internet Explorer (822925).
• Microsoft Security Bulletin MS03-040: Cumulative Patch for Internet Explorer (828750).
• Microsoft Security Bulletin MS03-048: Cumulative Security Update for Internet Explorer (824145).
• Microsoft Security Bulletin MS04-004: Cumulative Security Update for Internet Explorer (832894).
• Microsoft Security Bulletin MS04-025: Cumulative Security Update for Internet Explorer (867801).
• Microsoft Security Bulletin MS04-038: Cumulative Security Update for Internet Explorer (834707).
• Microsoft Security Bulletin MS04-040: Cumulative Security Update for Internet Explorer (889293).
• Microsoft Security Bulletin MS05-014: Cumulative Security Update for Internet Explorer (867282).
• Microsoft Security Bulletin MS05-020: Cumulative Security Update for Internet Explorer (890923).
• Microsoft Security Bulletin MS05-025: Cumulative Security Update for Internet Explorer (883939).
• Microsoft Security Bulletin MS05-038: Cumulative Security Update for Internet Explorer (896727).
• Microsoft Security Bulletin MS05-052: Cumulative Security Update for Internet Explorer (896688).
• Microsoft Security Bulletin MS05-054: Cumulative Security Update for Internet Explorer (905915).
• Microsoft Security Bulletin MS06-004: Cumulative Security Update for Internet Explorer (910620).
• Microsoft Security Bulletin MS06-013: Cumulative Security Update for Internet Explorer (912812).
• Microsoft Security Bulletin MS06-021: Cumulative Security Update for Internet Explorer (916281).
• Microsoft Security Bulletin MS06-042: Cumulative Security Update for Internet Explorer (918899).
• Microsoft Security Bulletin MS06-067: Cumulative Security Update for Internet Explorer (922760).
• Microsoft Security Bulletin MS06-072: Cumulative Security Update for Internet Explorer (925454).
• Microsoft Security Bulletin MS07-016: Cumulative Security Update for Internet Explorer (928090).
• Microsoft Security Bulletin MS07-027: Cumulative Security Update for Internet Explorer (931768).
• Microsoft Security Bulletin MS07-033: Cumulative Security Update for Internet Explorer (933566).
• Microsoft Security Bulletin MS07-045: Cumulative Security Update for Internet Explorer (937143).
• Microsoft Security Bulletin MS07-057: Cumulative Security Update for Internet Explorer (939653).
• Microsoft Security Bulletin MS07-069: Cumulative Security Update for Internet Explorer (942615).
• Microsoft Security Bulletin MS08-010: Cumulative Security Update for Internet Explorer (944533).
• Microsoft Security Bulletin MS08-024: Cumulative Security Update for Internet Explorer (947864).
• Microsoft Security Bulletin MS08-031: Cumulative Security Update for Internet Explorer (950759).
• Microsoft Security Bulletin MS08-045: Cumulative Security Update for Internet Explorer (953838).
• Microsoft Security Bulletin MS08-058: Cumulative Security Update for Internet Explorer (956390).
• BID-4930: Multiple Microsoft Product Gopher Client Buffer Overflow Vulnerability
• CVE-2002-0371: Buffer overflow in gopher client for Microsoft Internet Explorer 5.1 through 6.0, Proxy Server 2.0, or ISA Server 2000 allows remote attackers to execute arbitrary code via a gopher:// URL that redirects the user to a real or simulated gopher server that sends a long response.
• OSVDB ID: 3004: Microsoft IE Gopher Client Overflow
• US-CERT VU#440275: Microsoft Internet Explorer contains buffer overflow in handling of gopher replies

Platforms Affected:

• Microsoft Internet Explorer 5.01
• Microsoft Internet Explorer 5.5
• Microsoft Internet Explorer 6.0
• Microsoft ISA Server 2000
• Microsoft Proxy Server 2.0

Reported:

Jun 04, 2002

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