Freeciv packets.c handle_player_attribute_chunk() denial of service
| freeciv-packetsc-dos (27955) |  Low Risk |
Description:
Freeciv is vulnerable to a denial of service attack, caused by a vulnerability in the generic_handle_player_attribute_chunk() function in packets.c. A remote attacker could exploit this vulnerability to cause the server to crash by sending specially-crafted packets with negative value or a large positive offset.
Platforms Affected:
- Debian, Debian Linux 3.1
- Freeciv, Freeciv 2.1.0beta1 and prior
- Freeciv, Freeciv SVN 15-07-2006 and prior
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux 2006
Remedy:
Upgrade to the latest version of Freeciv (SVN 16 Jul 2006 or later), available from SourceForge.net. See References.
For Debian GNU/Linux:
Refer to DSA-1142-1 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Denial of Service
References:
- Luigi Auriemma Advisory 23 Jul 2006, Two crash vulnerabilities in Freeciv 2.1.0-beta1 (SVN 15 Jul 2006) at http://aluigi.altervista.org/adv/freecivx-adv.txt.
- SourceForge.net: Files, Freeciv at http://sourceforge.net/project/showfiles.php?group_id=138322.
- BID-19117: Freeciv Multiple Remote Denial of Service Vulnerabilities
- CVE-2006-3913: Buffer overflow in Freeciv 2.1.0-beta1 and earlier, and SVN 15 Jul 2006 and earlier, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a (1) negative chunk_length or a (2) large chunk->offset value in a PACKET_PLAYER_ATTRIBUTE_CHUNK packet in the generic_handle_player_attribute_chunk function in common/packets.c, and (3) a large packet->length value in the handle_unit_orders function in server/unithand.c.
- DSA-1142: freeciv -- missing boundary checks
- MDKSA-2006:135: Updated freeciv packages fix DoS vulnerabilities
- SA21171: Freeciv Denial of Service Vulnerabilities
- VUPEN/ADV-2006-2942: Freeciv packets.c and unithand.c Packets Handling Denial of Service Vulnerabilities
Reported:
Jul 23, 2006
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