How severe is CVE-2009-0780?

CVE-2009-0780 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-0780 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0780?

CVE-2009-0780 primarily affects Openbsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0780?

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

When was CVE-2009-0780 published?

CVE-2009-0780 was published on 2009-03-04 and last updated on 2026-06-16.

CVE-2009-0780

CVE-2009-0780 is a medium-severity vulnerability in Openbsd 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: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openbsd
Published: 2009-03-04
Last modified: 2026-06-16

Description

The aspath_prepend function in rde_attr.c in bgpd in OpenBSD 4.3 and 4.4 allows remote attackers to cause a denial of service (application crash) via an Autonomous System (AS) advertisement containing a long AS path.

Frequently asked questions

What is CVE-2009-0780?: The aspath_prepend function in rde_attr.c in bgpd in OpenBSD 4.3 and 4.4 allows remote attackers to cause a denial of service (application crash) via an Autonomous System (AS) advertisement containing a long AS path.
How severe is CVE-2009-0780?: CVE-2009-0780 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-0780 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0780?: CVE-2009-0780 primarily affects Openbsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0780?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0780 published?: CVE-2009-0780 was published on 2009-03-04 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:o:openbsd:openbsd:4.3:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:4.4:*:*:*:*:*:*:*

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