CVE-2012-1191

Exp

The resolver in dnscache in Daniel J. Bernstein djbdns 1.05 overwrites cached server names and TTL values in NS records during the processing of a response to an A record query, which allows remote attackers to trigger continued resolvability of revoked domain names via a "ghost domain names" attack.

Published: 2012-02-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-1191 is rated High Exploit Risk (69.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.92%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.45% over the last day, indicating growing attacker interest. 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-2012-1191

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2012-1191

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 0.47% 1.92% +1.45%
2 2025-03-17 0.33% 0.47% +0.14%
3 2024-09-17 — 0.33% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-1191

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.4 2.0 MEDIUM
AV:N/AC:L/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:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2012-1191

OS Trackers for CVE-2012-1191

vendor priority summary link
debian not yet assigned CVE-2012-1191 not yet assigned 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-2012-1191
ubuntu medium CVE-2012-1191 medium priority: Ubuntu including 1 source packages (djbdns), 34 status rows across 34 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hardy, hirsute, impish, jammy, kinetic, lucid, lunar, mantic, maverick, natty, noble, oneiric, oracular, plucky, precise, quantal, questing, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 19, DNE 10, needs-triage 4, needed 1. https://ubuntu.com/security/CVE-2012-1191

Affected software / configurations for CVE-2012-1191

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

References for CVE-2012-1191

cvelogic Threat Intelligence