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2 advisories reference net-dns/pdnsd · none place version 1.2.9a-r2 in a vulnerable range
▸ GLSA 200901-03 pdnsd: Denial of Service and cache poisoning this version unaffected normal remote 2009-01-11

Two errors in pdnsd allow for Denial of Service and cache poisoning.

Announced
2009-01-11
Revised
2009-01-11
Access
remote
Bugs
#231285
Advisory
https://security.gentoo.org/glsa/200901-03

Affected packages

PackageArchVulnerableUnaffected
net-dns/pdnsd*< 1.2.7>= 1.2.7

Background

pdnsd is a proxy DNS server with permanent caching that is designed to cope with unreachable DNS servers.

Description

Two issues have been reported in pdnsd:

  • The p_exec_query() function in src/dns_query.c does not properly handle many entries in the answer section of a DNS reply, related to a "dangling pointer bug" (CVE-2008-4194).
  • The default value for query_port_start was set to 0, disabling UDP source port randomization for outgoing queries (CVE-2008-1447).

Impact

An attacker could exploit the second weakness to poison the cache of pdnsd and thus spoof DNS traffic, which could e.g. lead to the redirection of web or mail traffic to malicious sites. The first issue can be exploited by enticing pdnsd to send a query to a malicious DNS server, or using the port randomization weakness, and might lead to a Denial of Service.

Workaround

Port randomization can be enabled by setting the "query_port_start" option to 1024 which would resolve the CVE-2008-1447 issue.

Resolution

All pdnsd users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/pdnsd-1.2.7"

References

▸ GLSA 200605-10 pdnsd: Denial of Service and potential arbitrary code execution this version unaffected high remote 2006-05-10

pdnsd is vulnerable to a buffer overflow that may result in arbitrary code execution.

Announced
2006-05-10
Revised
2006-05-10
Access
remote
Bugs
#131341
Advisory
https://security.gentoo.org/glsa/200605-10

Affected packages

PackageArchVulnerableUnaffected
net-dns/pdnsd*< 1.2.4>= 1.2.4

Background

pdnsd is a proxy DNS server with permanent caching that is designed to cope with unreachable DNS servers.

Description

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.

Impact

An attacker can craft malicious DNS queries leading to a Denial of Service, and potentially the execution of arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All pdnsd users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/pdnsd-1.2.4-r1"

References