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TITLE:
AlphaLPD Packet Processing Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA45505

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45505/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45505

RELEASE DATE:
2011-08-05

DISCUSS ADVISORY:
http://secunia.com/advisories/45505/#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/45505/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45505

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:
A vulnerability has been discovered in AlphaLPD, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an indexing error when processing
certain requests and can be exploited to dereference an invalid
memory location via specially crafted packets sent to TCP port 515.

Successful exploitation requires knowing a valid printer queue name.

The vulnerability is confirmed in version 4.0e. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted hosts only.

PROVIDED AND/OR DISCOVERED BY:
Craig Freyman (cd1zz)

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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Please Note:
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Secunia NEVER sends attached files with advisories.
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