CVE-2001-1244

CVE-2001-1244 is a medium-severity vulnerability in Freebsd with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 35% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

Multiple TCP implementations could allow remote attackers to cause a denial of service (bandwidth and CPU exhaustion) by setting the maximum segment size (MSS) to a very small number and requesting large amounts of data, which generates more packets with less TCP-level data that amplify network traffic and consume more server CPU to process.

Frequently asked questions

What is CVE-2001-1244?
Multiple TCP implementations could allow remote attackers to cause a denial of service (bandwidth and CPU exhaustion) by setting the maximum segment size (MSS) to a very small number and requesting large amounts of data, which generates more packets with less TCP-level data that amplify network traffic and consume more server CPU to process.
How severe is CVE-2001-1244?
CVE-2001-1244 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2001-1244 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1244?
CVE-2001-1244 primarily affects Freebsd. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1244?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-1244 published?
CVE-2001-1244 was published on 2001-07-07 and last updated on 2026-06-16.

References

Affected products (29)

More vulnerabilities in Freebsd

All CVEs affecting Freebsd →