CVE-2011-1093

Published: 18 July 2011

The dccp_rcv_state_process function in net/dccp/input.c in the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel before 2.6.38 does not properly handle packets for a CLOSED endpoint, which allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by sending a DCCP-Close packet followed by a DCCP-Reset packet.

From the Ubuntu security team

Johan Hovold discovered that the DCCP network stack did not correctly handle certain packet combinations. A remote attacker could send specially crafted network traffic that would crash the system, leading to a denial of service.

Status

Notes

May have been introduced as late as 0c10c5d.
Was possibly fixed briefly by ddab055, but re-introduced by 410e27a.

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1093
• https://usn.ubuntu.com/usn/usn-1167-1
• https://usn.ubuntu.com/usn/usn-1160-1
• https://usn.ubuntu.com/usn/usn-1141-1
• https://usn.ubuntu.com/usn/usn-1093-1
• https://usn.ubuntu.com/usn/usn-1187-1
• https://usn.ubuntu.com/usn/usn-1189-1
• https://usn.ubuntu.com/usn/usn-1202-1
• https://usn.ubuntu.com/usn/usn-1204-1
• https://usn.ubuntu.com/usn/usn-1256-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/814087