CVE-2009-0858

Exp

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.

Published: 2009-03-09 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0858 is rated High Exploit Risk (65.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.28%, 93th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-0858

EDB-ID Source Kind Published Link
32825 exploit_db edb 2009-02-27 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-0858

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 13.67% 6.28% -7.39%
2 2026-04-29 12.05% 13.67% +1.62%
3 2026-03-09 — 12.05% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0858

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2009-0858

OS Trackers for CVE-2009-0858

vendor priority summary link
debian low CVE-2009-0858 low priority: Debian including 1 source packages (djbdns), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-0858
ubuntu medium CVE-2009-0858 medium priority: Ubuntu including 1 source packages (djbdns), 7 status rows across 7 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, upstream): DNE 3, not-affected 2, ignored 1, released 1. https://ubuntu.com/security/CVE-2009-0858

Affected software / configurations for CVE-2009-0858

Vendor Product Version Raw CPE
d.j.bernstein djbdns <= 1.05 cpe:2.3:a:d.j.bernstein:djbdns:*:*:*:*:*:*:*:*

References for CVE-2009-0858

cvelogic Threat Intelligence