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Fencer Vulns
medium 5.8

CVE-2009-0858 json

The response_addname function in response.c in Daniel J.

published 2009-03-09 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0855

cvss
5.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.3%
EPSS 6.3% chance of exploitation in 30 days, percentile 93%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • djbdns Debian 14, Debian 13, Debian 12 1:1.05-5

debian advisories DEBIAN-CVE-2009-0858

Timeline

  1. First public exploit (EDB-32825)
  2. Published

Exploit prediction

6.28% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-32825 djbdns 1.05 - Long Response Packet Remote Cache Poisoning remote, 2009-02-27
  • securityfocus.com http://www.securityfocus.com/bid/33937 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.