How severe is CVE-2011-5055?

CVE-2011-5055 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-5055 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-5055?

CVE-2011-5055 primarily affects Maradns. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-5055?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-5055 published?

CVE-2011-5055 was published on 2012-01-08 and last updated on 2026-06-16.

CVE-2011-5055

CVE-2011-5055 is a medium-severity vulnerability in Maradns with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Maradns
Published: 2012-01-08
Last modified: 2026-06-16

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.

Frequently asked questions

What is 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. NOTE: this issue exists because of an incomplete fix for CVE-2012-0024.
How severe is CVE-2011-5055?: CVE-2011-5055 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-5055 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-5055?: CVE-2011-5055 primarily affects Maradns. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-5055?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-5055 published?: CVE-2011-5055 was published on 2012-01-08 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:maradns:maradns:1.3.07.012:*:*:*:*:*:*:*
cpe:2.3:a:maradns:maradns:1.4.08:*:*:*:*:*:*:*

More vulnerabilities in Maradns

CVE-2012-0024 — High (CVSS 7.8): MaraDNS before 1.3.07.12 and 1.4.x before 1.4.08 computes hash values for DNS data without restricting the ability to…
CVE-2007-3115 — High (CVSS 7.8): Multiple memory leaks in server/MaraDNS.c in MaraDNS before 1.2.12.06, and 1.3.x before 1.3.05, allow remote attackers…
CVE-2023-31137 — High (CVSS 7.5): MaraDNS is open-source software that implements the Domain Name System (DNS). In version 3.5.0024 and prior, a remotely…
CVE-2022-30256 — High (CVSS 7.5): An issue was discovered in MaraDNS Deadwood through 3.5.0021 that allows variant V1 of unintended domain name…
CVE-2011-0520 — High (CVSS 7.5): The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows…
CVE-2008-0061 — Medium (CVSS 5.0): MaraDNS 1.0 before 1.0.41, 1.2 before 1.2.12.08, and 1.3 before 1.3.07.04 allows remote attackers to cause a denial of…

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