Input validation error in MaraDNS

1) Input validation error

EUVDB-ID: #VU44412

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-0024

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

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 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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MaraDNS: 0.0.01 - 1.4.07

CPE2.3

• cpe:2.3:a:sam_trenholme:maradns:0.0.01:*:*:*:*:*:*:*
• cpe:2.3:a:sam_trenholme:maradns:0.0.02:*:*:*:*:*:*:*
• cpe:2.3:a:sam_trenholme:maradns:0.0.03:*:*:*:*:*:*:*

External links

https://openwall.com/lists/oss-security/2012/01/03/13
https://openwall.com/lists/oss-security/2012/01/03/6
https://samiam.org/blog/20111229.html
https://bugzilla.redhat.com/show_bug.cgi?id=771428

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.