RSA WebID agent can't read Unicode

[InfoSec News <isn () c4i org>]

http://www.theregister.co.uk/content/55/22448.html

By John Leyden
Posted: 24/10/2001 at 13:49 GMT

RSA's Internet authentication product can be bypassed using a
combination of Unicode characters which IIS recognises but RSA's
security technology fails to decode.

RSA's WebID agent is supposed to deny access to a corporate intranet
until a user is properly authenticated by a SecurID server.

The potentially serious security vulnerability in RSA's product was
discovered by ProCheckUp, a UK security consultancy.

A variation of the same Unicode directory transversal-style exploit
would allow a hacker to obtain a directory listing.

Richard Brain, technical director of ProCheckUp, said the
vulnerability meant that unauthenticated users could be able to read
files and even execute programs on a supposedly secure server.

The issue is important because the Web agent of SecurID is used by
government organisations and the like to secure access to intranets or
for Outlook Web access.

RSA Security has issued a new release of the C libraries used in
SecurID which guards against the flaw, according to ProCheckUp. (RSA
has yet to respond to our call asking for comment).

Users are advised to the latest version ACE/Agent for Windows or
ACE/Agent for Windows 2000 to protect themselves against the
vulnerability.



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