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Links "smb" Protocol File Upload/Download Vulnerability
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Secunia Advisory:
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SA22905
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Release Date:
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2006-11-15
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Last Update:
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2006-12-22
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Popularity:
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7,815 views
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Critical:
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Moderately critical
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Impact:
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Manipulation of data
Exposure of system information
Exposure of sensitive information
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Where:
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From local network
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Solution Status:
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Unpatched
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| Software: | Links 0.x
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| CVE reference: | CVE-2006-5925
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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 an 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 visit a malicious "smb://" URL or get redirected to such a 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.
Fixed in version 1.00pre19.
Provided and/or discovered by:
Teemu Salmela
Changelog:
2006-11-29: Updated Solution with information about a fixed pre-release.
2006-12-22: Added CVE reference.
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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