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To improve our services to our customers, we have made a number of
additions to the Secunia Advisories and have started translating the
advisories to German.

The improvements will help our customers to get a better
understanding of how we reached our conclusions, how it was rated,
our thoughts on exploitation, attack vectors, and scenarios.

This includes:
* Reason for rating
* Extended description
* Extended solution
* Exploit code or links to exploit code
* Deep links

Read the full description:
http://corporate.secunia.com/products/48/?r=l

Contact Secunia Sales for more information:
http://corporate.secunia.com/how_to_buy/15/?r=l

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TITLE:
Links "smb" Protocol File Upload/Download Vulnerability

SECUNIA ADVISORY ID:
SA22905

VERIFY ADVISORY:
http://secunia.com/advisories/22905/

CRITICAL:
Moderately critical

IMPACT:
Manipulation of data, Exposure of system information, Exposure of
sensitive information

WHERE:
>From local network

SOFTWARE:
Links 0.x
http://secunia.com/product/12624/

DESCRIPTION:
Teemu Salmela has discovered a vulnerability in Links, which can be
exploited by malicious people to expose sensitive information and
manipulate data.

The vulnerability is caused due to an error in the validation of
"smb://" URLs when Links runs smbclient commands. This can be
exploited to download and overwrite local files or upload local files
to a SMB share by injecting smbclient commands in the "smb://" URL.

Successful exploitation allows exposure of sensitive information or
manipulation of data, but requires that the user visits a malicious
"smb://" URL or gets redirected to such an URL by a malicious URL,
and that the user has the smbclient program installed.

The vulnerability is confirmed in version 0.99 on the 0.x branch but
not in version 2.0 on the 2.x branch. Other versions may also be
affected.

SOLUTION:
Don't visit untrusted web sites.

Implement restrictive firewall rules for SMB traffic.

Uninstall the smbclient program from systems where it is not needed.

PROVIDED AND/OR DISCOVERED BY:
Teemu Salmela

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About:
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