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TITLE:
Cisco Linksys WMB54G TFTP Command Injection Vulnerability

SECUNIA ADVISORY ID:
SA49868

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/49868/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=49868

RELEASE DATE:
2012-07-20

DISCUSS ADVISORY:
http://secunia.com/advisories/49868/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/49868/

ONLY AVAILABLE IN CUSTOMER AREA:
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 * Report Reliability
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https://ca.secunia.com/?page=viewadvisory&vuln_id=49868

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Craig has reported a vulnerability in Cisco Linksys WMB54G, which can
be exploited by malicious people to compromise a vulnerable device.

The vulnerability is caused due to missing input validation in the
TFTP service when running the firmware update functionality and can
be exploited to inject and execute arbitrary shell commands.

NOTE: Additionally, it may be possible to apply malicious firmware
images uploaded via the TFTP service to the device.

The vulnerability is reported in version 1 running firmware version
2.18. Other versions may also be affected.

SOLUTION:
No official solution is currently available.

PROVIDED AND/OR DISCOVERED BY:
Craig, /dev/ttyS0

ORIGINAL ADVISORY:
Craig:
http://www.devttys0.com/2012/07/hacking-the-linksys-wmb54g/

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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