Input validation error in PowerDNS Recursor



Published: 2012-02-18 | Updated: 2020-08-11
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2012-1193
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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PowerDNS Recursor
Server applications / DNS servers

Vendor PowerDNS.COM B.V.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU44267

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-1193

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.

The resolver in PowerDNS Recursor (aka pdns_recursor) 3.3 overwrites cached server names and TTL values in NS records during the processing of a response to an A record query, which allows remote attackers to trigger continued resolvability of revoked domain names via a "ghost domain names" attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PowerDNS Recursor: 3.3

External links

http://lists.fedoraproject.org/pipermail/package-announce/2013-April/102729.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/104173.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/104177.html
http://www.isc.org/files/imce/ghostdomain_camera.pdf


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.



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