VulnerabilityModified

CVE-2009-0858

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…

EXPLOIT ✓MEDIUM 5.8EPSS 6.28%

Does this matter?

A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 6.3%. Treat it as high on anything reachable from the internet.

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.

CVSS 2.0: 5.8 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:P
EPSS: 6.28% probability · 94th percentile
Public exploits: 1 in Exploit-DB · verified · first 27 February 2009
CISA KEV: Not listed
Weakness: CWE-20
Affected: d.j.bernstein/djbdns
Source: cve@mitre.org

EPSS trend

EPSS 6.3% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-ID	Title	Type	Published	Verified
EDB-32825 source ↗	djbdns 1.05 - Long Response Packet Remote Cache Poisoninglinux · Matthew Dempsky	remote	27 February 2009	yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.