How severe is CVE-2013-5209?

CVE-2013-5209 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2013-5209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-5209?

CVE-2013-5209 primarily affects Freebsd. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-5209?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-5209 published?

CVE-2013-5209 was published on 2013-08-29 and last updated on 2026-06-16.

CVE-2013-5209

CVE-2013-5209 is a high-severity vulnerability in Freebsd with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Freebsd
Published: 2013-08-29
Last modified: 2026-06-16

Description

The sctp_send_initiate_ack function in sys/netinet/sctp_output.c in the SCTP implementation in the kernel in FreeBSD 8.3 through 9.2-PRERELEASE does not properly initialize the state-cookie data structure, which allows remote attackers to obtain sensitive information from kernel stack memory by reading packet data in INIT-ACK chunks.

Frequently asked questions

What is CVE-2013-5209?: The sctp_send_initiate_ack function in sys/netinet/sctp_output.c in the SCTP implementation in the kernel in FreeBSD 8.3 through 9.2-PRERELEASE does not properly initialize the state-cookie data structure, which allows remote attackers to obtain sensitive information from kernel stack memory by reading packet data in INIT-ACK chunks.
How severe is CVE-2013-5209?: CVE-2013-5209 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2013-5209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-5209?: CVE-2013-5209 primarily affects Freebsd. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-5209?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-5209 published?: CVE-2013-5209 was published on 2013-08-29 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:o:freebsd:freebsd:8.3:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:9.0:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:9.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:9.1:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:9.1:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:9.2:prerelease:*:*:*:*:*:*

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