Short Name |
GOPHER:IE-GOPHER-OF |
---|---|
Severity |
Warning |
Recommended |
No |
Category |
GOPHER |
Keywords |
Internet Explorer Gopher Client Buffer Overflow |
Release Date |
2003/04/22 |
Update Number |
1213 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
This signature detects attempts to exploit a known vulnerability against Microsoft Internet Explorer using the Gopher protocol. A malicious URL can be embedded in an image tag (<IMG>) on a malicious Web server to cause a client to visit that URL and become vulnerable to arbitrary code execution. If the malicious Gopher server is running on a computer other than the Web server that contained the embedded URL, attackers can send a popular bindshell() type Windows shellcode to the client after the +ABSTRACT Gopher tag.
Microsoft Internet Explorer, Proxy Server and ISA Server includes a gopher client. Reportedly, these clients are vulnerable to a buffer overflow condition. The vulnerability exists in the component that parses gopher replies. A malicious server is able to send a reply that will overflow the buffer and run arbitrary code on a user's system.