CVE-2005-0065

Description

The original design of TCP does not check that the TCP sequence number in an ICMP error message is within the range of sequence numbers for data that has been sent but not acknowledged (aka "TCP sequence number checking"), which makes it easier for attackers to forge ICMP error messages for specific TCP connections and cause a denial of service, as demonstrated using (1) blind connection-reset attacks with forged "Destination Unreachable" messages, (2) blind throughput-reduction attacks with forged "Source Quench" messages, or (3) blind throughput-reduction attacks with forged ICMP messages that cause the Path MTU to be reduced. NOTE: CVE-2004-0790, CVE-2004-0791, and CVE-2004-1060 have been SPLIT based on different attacks; CVE-2005-0065, CVE-2005-0066, CVE-2005-0067, and CVE-2005-0068 are related identifiers that are SPLIT based on the underlying vulnerability. While CVE normally SPLITs based on vulnerability, the attack-based identifiers exist due to the variety and number of affected implementations and solutions that address the attacks instead of the underlying vulnerabilities.

10.0

CVSS

Severity: Critical

CVSS 2.0 •

EPSS 0.41%

Affected: n/a n/a

References

Link	Tags
http://www.securityfocus.com/bid/13124	vdb entry
http://www.gont.com.ar/drafts/icmp-attacks-against-tcp.html

Frequently Asked Questions

What is the severity of CVE-2005-0065?: CVE-2005-0065 has been scored as a critical severity vulnerability.
How to fix CVE-2005-0065?: To fix CVE-2005-0065, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2005-0065 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2005-0065 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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