How severe is CVE-2005-2068?

CVE-2005-2068 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-2068 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-2068?

CVE-2005-2068 primarily affects Freebsd. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-2068?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2005-2068 published?

CVE-2005-2068 was published on 2005-07-05 and last updated on 2026-06-16.

CVE-2005-2068

CVE-2005-2068 is a medium-severity vulnerability in Freebsd with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Freebsd
Published: 2005-07-05
Last modified: 2026-06-16

Description

FreeBSD 4.x through 4.11 and 5.x through 5.4 allows remote attackers to modify certain TCP options via a TCP packet with the SYN flag set for an already established session.

Frequently asked questions

What is CVE-2005-2068?: FreeBSD 4.x through 4.11 and 5.x through 5.4 allows remote attackers to modify certain TCP options via a TCP packet with the SYN flag set for an already established session.
How severe is CVE-2005-2068?: CVE-2005-2068 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-2068 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-2068?: CVE-2005-2068 primarily affects Freebsd. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-2068?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-2068 published?: CVE-2005-2068 was published on 2005-07-05 and last updated on 2026-06-16.

References

ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:15.tcp.asc

Affected products (20)

cpe:2.3:o:freebsd:freebsd:4.0:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.1.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.2:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.3:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.4:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.5:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.6:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.6.2:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.7:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.8:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.9:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.10:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:4.11:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:5.0:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:5.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:5.2:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:5.2.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:5.3:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:5.4:*:*:*:*:*:*:*

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