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Insecure Library Loading
Moderately critical

Unbound Two Denial of Service Vulnerabilities

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Release Date:  2011-12-19    Last Update:  2011-12-23    Views:  1,750

Secunia Advisory SA47220

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Two vulnerabilities have been reported in Unbound, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) A memory allocation error when processing certain RRs (Resource Records) can be exploited to cause a crash by sending signed duplicate redirecting RRs.

2) An error when processing certain responses for NSEC3-signed zones can be exploited to e.g. cause an assertion error or crash by sending specially crafted responses.

The vulnerabilities are reported in versions prior to 1.4.14.


Solution:
Update to version 1.4.13p2 and 1.4.14 or apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Reported by the vendor.

Original Advisory:
http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Unbound Two Denial of Service Vulnerabilities

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