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TITLE:
Freeciv Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA40476

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40476/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40476

RELEASE DATE:
2010-07-06

DISCUSS ADVISORY:
http://secunia.com/advisories/40476/#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/40476/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
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https://ca.secunia.com/?page=viewadvisory&vuln_id=40476

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:
Luigi Auriemma has reported some vulnerabilities in Freeciv, which
can be exploited by malicious people to cause a DoS (Denial of
Service).

1) An error exists within the processing of jumbo packets with a
packet length of less than 6, which can be exploited to terminate the
server by sending a specially crafted jumbo packet.

2) Infinite loops when processing PACKET_PLAYER_INFO,
PACKET_GAME_INFO, PACKET_EDIT_PLAYER_CREATE,
PACKET_EDIT_PLAYER_REMOVE, PACKET_EDIT_CITY, and PACKET_EDIT_PLAYER
packets can be exploited to cause a high CPU usage and stop the
server from responding by sending specially crafted packets.

The vulnerabilities are reported in version 2.2.1. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted players only.

PROVIDED AND/OR DISCOVERED BY:
Luigi Auriemma

ORIGINAL ADVISORY:
http://aluigi.altervista.org/adv/freecivet-adv.txt

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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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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