Is CVE-2009-0858 in the CISA KEV catalog?

No. CVE-2009-0858 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0858?

CVE-2009-0858 has a CVSS v2 base score of 5.8 (MEDIUM).

What is the EPSS score for CVE-2009-0858?

CVE-2009-0858 has an EPSS score of 6.28% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-0858?

Upgrade djbdns on debian 11 to 1:1.05-5 or later.

CVE & CISA-KEV Catalog

CVE-2009-0858

MEDIUMEPSS 93th pctl

5.8

CVSS v2

NVD

Description

The response_addname function in response.c in Daniel J. Bernstein djbdns 1.05 and earlier does not constrain offsets in the required manner, which allows remote attackers, with control over a third-party subdomain served by tinydns and axfrdns, to trigger DNS responses containing arbitrary records via crafted zone data for this subdomain.

CWE-20Improper Input Validation

How to fix

Remediation Available

djbdnsDebian

Fixed in:1:1.05-5CVE-2009-0858

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

6.28%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch1

securityandthe.net

Exploit1

securityfocus.com

Other references9

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.