Vulnerability Details : 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.
Vulnerability category: Input validationDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2011-5055
Probability of exploitation activity in the next 30 days: 0.32%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 70 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2011-5055
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
CWE ids for CVE-2011-5055
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The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
References for CVE-2011-5055
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https://bugzilla.redhat.com/show_bug.cgi?id=771428
771428 – (CVE-2011-5056, CVE-2012-0024) CVE-2011-5056 CVE-2012-0024 maradns: hash table collisions CPU usage DoS
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http://openwall.com/lists/oss-security/2012/01/03/6
oss-security - CVE request: maradns hash table collision cpu dos
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http://samiam.org/blog/20111230.html
MaraDNS 1 updatePatch
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http://openwall.com/lists/oss-security/2012/01/03/13
oss-security - Re: CVE request: maradns hash table collision cpu dos
Products affected by CVE-2011-5055
- cpe:2.3:a:maradns:maradns:1.4.08:*:*:*:*:*:*:*
- cpe:2.3:a:maradns:maradns:1.3.07.012:*:*:*:*:*:*:*