pdnsd: Denial of Service and potential arbitrary code execution
Gentoo Linux Security Advisory
||GLSA 200605-10 / pdnsd
||May 10, 2006
||May 10, 2006: 01
All supported architectures
pdnsd is vulnerable to a buffer overflow that may result in arbitrary code
pdnsd is a proxy DNS server with permanent caching that is
designed to cope with unreachable DNS servers.
The pdnsd team has discovered an unspecified buffer overflow
vulnerability. The PROTOS DNS Test Suite, by the Oulu University Secure
Programming Group (OUSPG), has also revealed a memory leak error within
the handling of the QTYPE and QCLASS DNS queries, leading to
consumption of large amounts of memory.
An attacker can craft malicious DNS queries leading to a Denial of
Service, and potentially the execution of arbitrary code.
There is no known workaround at this time.
All pdnsd users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/pdnsd-1.2.4-r1"