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Other Documents
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Netfilter Information for VU#222750
| Date Notified: | 2004-08-12 |
| Date Updated: | |
| Statement Date: | |
| Status Summary: | Vulnerable |
Vendor StatementThe Linux kernel TCP/IP implementation has always been verifying the TCP sequence number embedded into the ICMP packet, and Linux end hosts are thus not affected by this vulnerability.
As for non-Linux machines protected by a netfilter/iptables firewall: netfilter/iptables did not implement TCP sequence number (aka window) tracking at all until linux-2.6.9.
However, even in linux >= 2.6.9, the check for RELATED ICMP packets does not verify the tcp sequence number of the encapsulated packet.
Implementation of such a check is scheduled for inclusion into the 2.6.11 linux kernel.Vendor InformationThe vendor has not provided us with any further information regarding this vulnerability.
AddendumUS-CERT has no additional comments at this time.
If you have feedback, comments, or additional information about this vulnerability, please send us
email.
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