CVE-2011-5055 — MaraDNS 1.3.07.12 and 1.4.08 computes hash values for DNS data without properly restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set

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MEDIUM

MaraDNS 1.3.07.12 and 1.4.08 computes hash values for DNS data without properly restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set

Published Jan 8, 2012

5.0

MEDIUM

CVSS 2.0

EPSS 1.45%

Description

MaraDNS 1.3.07.12 and 1.4.08 computes hash values for DNS data without properly restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set. NOTE: this issue exists because of an incomplete fix for CVE-2012-0024.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.45% 0.01447

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01447

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (14 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.45% (0.01447)	72.37th	v5 (v2026.06.15)
Jun 15, 2026	1.58% (0.01577)	72.19th	v5 (v2026.06.15)
Mar 17, 2025	0.60% (0.00603)	67.71th	v4 (v2025.03.14)
Dec 12, 2024	1.13% (0.01132)	85.33th	v3 (v2023.03.01)
May 24, 2024	0.64% (0.00639)	79.14th	v3 (v2023.03.01)
May 10, 2024	0.54% (0.00537)	77.10th	v3 (v2023.03.01)
Apr 25, 2024	0.45% (0.00454)	74.91th	v3 (v2023.03.01)
Mar 15, 2024	0.32% (0.00320)	69.92th	v3 (v2023.03.01)
Feb 8, 2024	0.29% (0.00290)	68.13th	v3 (v2023.03.01)
Mar 7, 2023	1.13% (0.01132)	82.47th	v3 (v2023.03.01)
Mar 6, 2023	1.21% (0.01213)	66.61th	v2 (v2022.01.01)
Feb 17, 2023	1.21% (0.01213)	66.22th	v2 (v2022.01.01)
Apr 1, 2022	1.21% (0.01213)	64.21th	v2 (v2022.01.01)
Feb 4, 2022	1.21% (0.01213)	40.54th	v2 (v2022.01.01)

Weaknesses (1)

CWE-20

Improper Input Validation

References (4)

http://openwall.com/lists/oss-security/2012/01/03/13
mailing-listx_refsource_MLIST
http://openwall.com/lists/oss-security/2012/01/03/6
mailing-listx_refsource_MLIST
http://samiam.org/blog/20111230.html
x_refsource_CONFIRMPatch
https://bugzilla.redhat.com/show_bug.cgi?id=771428
x_refsource_CONFIRM

Link	Providers	Tags
http://openwall.com/lists/oss-security/2012/01/03/13		mailing-listx_refsource_MLIST
http://openwall.com/lists/oss-security/2012/01/03/6		mailing-listx_refsource_MLIST
http://samiam.org/blog/20111230.html		x_refsource_CONFIRMPatch
https://bugzilla.redhat.com/show_bug.cgi?id=771428		x_refsource_CONFIRM

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jan 8, 2012

Updated Sep 16, 2024

Reserved Jan 7, 2012

Link CVE-2011-5055

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-5055

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-5055