Resource management error in Unbound

1) Resource management error

EUVDB-ID: #VU45009

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-1922

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

daemon/worker.c in Unbound 1.x before 1.4.10, when debugging functionality and the interface-automatic option are enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DNS request that triggers improper error handling.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Unbound: 1.0.0 - 1.4.9

External links

http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061243.html
http://osvdb.org/72750
http://secunia.com/advisories/44865
http://unbound.nlnetlabs.nl/downloads/CVE-2011-1922.txt
http://www.kb.cert.org/vuls/id/531342
http://www.securityfocus.com/bid/47986
http://exchange.xforce.ibmcloud.com/vulnerabilities/67645

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.