CVE-2011-5056

The authoritative server in MaraDNS through 2.0.04 computes hash values for DNS data without restricting the ability to trigger hash collisions predictably, which might allow local users to cause a denial of service (CPU consumption) via crafted records in zone files, a different vulnerability than CVE-2012-0024.

Published: 2012-01-08 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-5056 is rated Low Risk (15.7/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.08%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

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

Exploit prediction scoring system (EPSS) score for CVE-2011-5056

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 2025-03-17 0.04% 0.08% +0.04%
2 2023-03-07 0.89% 0.04% -0.85%
3 2022-02-04 — 0.89% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-5056

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
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:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-2011-5056

OS Trackers for CVE-2011-5056

vendor priority summary link
debian unimportant CVE-2011-5056 unimportant priority: Debian including 1 source packages (maradns), 1 status rows across 1 suites (bullseye): resolved 1. https://security-tracker.debian.org/tracker/CVE-2011-5056
ubuntu medium CVE-2011-5056 medium priority: Ubuntu including 1 source packages (maradns), 29 status rows across 29 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hardy, hirsute, impish, jammy, kinetic, lucid, lunar, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 22, not-affected 5, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2011-5056

Affected software / configurations for CVE-2011-5056

Vendor Product Version Raw CPE
maradns maradns <= 2.0.04 cpe:2.3:a:maradns:maradns:*:*:*:*:*:*:*:*

References for CVE-2011-5056

URL Tags
http://samiam.org/blog/20111229.html Patch Third Party Advisory
http://www.securitytracker.com/id?1026820 Third Party Advisory VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/72258 Third Party Advisory VDB Entry
cvelogic Threat Intelligence