1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
2 |
Gentoo Linux Security Advisory GLSA 201202-04 |
3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
4 |
http://security.gentoo.org/ |
5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
6 |
|
7 |
Severity: Normal |
8 |
Title: PowerDNS: Denial of Service |
9 |
Date: February 22, 2012 |
10 |
Bugs: #398403 |
11 |
ID: 201202-04 |
12 |
|
13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
14 |
|
15 |
Synopsis |
16 |
======== |
17 |
|
18 |
A vulnerability in PowerDNS could allow a remote attacker to create a |
19 |
Denial of Service condition. |
20 |
|
21 |
Background |
22 |
========== |
23 |
|
24 |
The PowerDNS nameserver is an authoritative-only nameserver which uses |
25 |
a flexible backend architecture. |
26 |
|
27 |
Affected packages |
28 |
================= |
29 |
|
30 |
------------------------------------------------------------------- |
31 |
Package / Vulnerable / Unaffected |
32 |
------------------------------------------------------------------- |
33 |
1 net-dns/pdns < 3.0.1 >= 3.0.1 |
34 |
|
35 |
Description |
36 |
=========== |
37 |
|
38 |
A vulnerability has been found in PowerDNS which could cause a packet |
39 |
loop of DNS responses. |
40 |
|
41 |
Impact |
42 |
====== |
43 |
|
44 |
A remote attacker could send specially crafted DNS response packets, |
45 |
possibly resulting in a Denial of Service condition. |
46 |
|
47 |
Workaround |
48 |
========== |
49 |
|
50 |
PowerDNS users can set "cache-ttl=0" in /etc/powerdns/pdns.conf and |
51 |
then restart the PowerDNS daemon: |
52 |
|
53 |
# /etc/init.d/pdns restart |
54 |
|
55 |
Please review the PowerDNS Security Advisory below for more workaround |
56 |
details. |
57 |
|
58 |
Resolution |
59 |
========== |
60 |
|
61 |
All PowerDNS users should upgrade to the latest version: |
62 |
|
63 |
# emerge --sync |
64 |
# emerge --ask --oneshot --verbose ">=net-dns/pdns-3.0.1" |
65 |
|
66 |
References |
67 |
========== |
68 |
|
69 |
[ 1 ] CVE-2012-0206 |
70 |
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0206 |
71 |
[ 2 ] PowerDNS Security Advisory 2012-01 |
72 |
http://doc.powerdns.com/powerdns-advisory-2012-01.html |
73 |
|
74 |
Availability |
75 |
============ |
76 |
|
77 |
This GLSA and any updates to it are available for viewing at |
78 |
the Gentoo Security Website: |
79 |
|
80 |
http://security.gentoo.org/glsa/glsa-201202-04.xml |
81 |
|
82 |
Concerns? |
83 |
========= |
84 |
|
85 |
Security is a primary focus of Gentoo Linux and ensuring the |
86 |
confidentiality and security of our users' machines is of utmost |
87 |
importance to us. Any security concerns should be addressed to |
88 |
security@g.o or alternatively, you may file a bug at |
89 |
https://bugs.gentoo.org. |
90 |
|
91 |
License |
92 |
======= |
93 |
|
94 |
Copyright 2012 Gentoo Foundation, Inc; referenced text |
95 |
belongs to its owner(s). |
96 |
|
97 |
The contents of this document are licensed under the |
98 |
Creative Commons - Attribution / Share Alike license. |
99 |
|
100 |
http://creativecommons.org/licenses/by-sa/2.5 |