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TITLE:
UMN Gopher "VIfromLine()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA16614

VERIFY ADVISORY:
http://secunia.com/advisories/16614/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
UMN Gopher 3.x
http://secunia.com/product/1860/

DESCRIPTION:
vade79 has discovered a vulnerability in Gopher client, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the
"VIfromLine()" function when copying an input line to a stack buffer.
This can be exploited to cause a stack-based buffer overflow via an
overly long "+VIEWS:" reply from the server.

Successful exploitation requires that a user e.g. is tricked into
connecting to a malicious Gopher server.

The vulnerability has been confirmed in version 3.0.9. Other versions
may also be affected.

SOLUTION:
Connect to trusted Gopher servers only.

PROVIDED AND/OR DISCOVERED BY:
vade79

ORIGINAL ADVISORY:
http://www.fakehalo.us/xgopher-client.c

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About:
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