Input validation error in PowerDNS Recursor - CVE-2012-1193
Published: February 18, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU44267
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2012-1193
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
PowerDNS Recursor
Gentoo Linux
Fedora
pdns-recursor
net-dns/pdns-recursor
Gentoo Linux
Fedora
pdns-recursor
net-dns/pdns-recursor
How to mitigate CVE-2012-1193
Install update from vendor's website.
pdns-recursor - addressed in versions 3.5-1.el5, 3.5-1.el6
net-dns/pdns-recursor - update to 3.6.1-r1
net-dns/pdns-recursor - update to 3.6.1-r1