Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title New pdns-recursor packages fix predictable randomness
Informations
Name DSA-1544 First vendor Publication 2008-04-09
Vendor Debian Last vendor Modification 2008-07-16
Severity (Vendor) N/A Revision 2

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 6.8 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Thomas Biege discovered that the upstream fix for the weak random number generator released in DSA-1544-1 was incomplete: Source port randomization did still not use difficult-to-predict random numbers. This is corrected in this security update.

Here is the text of the original advisory:

Amit Klein discovered that pdns-recursor, a caching DNS resolver, uses a weak random number generator to create DNS transaction IDs and UDP source port numbers. As a result, cache poisoning attacks were simplified. (CVE-2008-1637)

In the light of recent DNS-related developments (documented in DSAs 1603, 1604, 1605), we recommend that this update is installed as an additional safety measure. (The lack of source port randomization was addressed in the 3.1.6 upstream version.)

In addition, this update incorporates the changed IP address of L.ROOT-SERVERS.NET.

For the stable distribution (etch), this problem has been fixed in version 3.1.4-1+etch2.

For the unstable distribution (sid), this problem has been fixed in version 3.1.7-1.

We recommend that you upgrade your pdns-recursor package.

Original Source

Url : http://www.debian.org/security/2008/dsa-1544

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-189 Numeric Errors (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 14

OpenVAS Exploits

Date Description
2009-02-17 Name : Fedora Update for pdns-recursor FEDORA-2008-3010
File : nvt/gb_fedora_2008_3010_pdns-recursor_fc7.nasl
2009-02-17 Name : Fedora Update for pdns-recursor FEDORA-2008-3036
File : nvt/gb_fedora_2008_3036_pdns-recursor_fc8.nasl
2008-09-24 Name : Gentoo Security Advisory GLSA 200804-22 (pdns-recursor)
File : nvt/glsa_200804_22.nasl
2008-08-15 Name : Debian Security Advisory DSA 1544-2 (pdns-recursor)
File : nvt/deb_1544_2.nasl
2008-04-21 Name : Debian Security Advisory DSA 1544-1 (pdns-recursor)
File : nvt/deb_1544_1.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
43905 PowerDNS Recursor DNS Predictable Transaction ID (TRXID) Cache Poisoning Weak...

Nessus® Vulnerability Scanner

Date Description
2008-08-25 Name : The remote name server is affected by a cache poisoning vulnerability.
File : pdns_recursor_cache_poisining.nasl - Type : ACT_GATHER_INFO
2008-06-04 Name : The remote openSUSE host is missing a security update.
File : suse_pdns-5242.nasl - Type : ACT_GATHER_INFO
2008-06-04 Name : The remote openSUSE host is missing a security update.
File : suse_pdns-recursor-5319.nasl - Type : ACT_GATHER_INFO
2008-04-22 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200804-22.nasl - Type : ACT_GATHER_INFO
2008-04-17 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-1544.nasl - Type : ACT_GATHER_INFO
2008-04-11 Name : The remote Fedora host is missing a security update.
File : fedora_2008-3010.nasl - Type : ACT_GATHER_INFO
2008-04-11 Name : The remote Fedora host is missing a security update.
File : fedora_2008-3036.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
Date Informations
2014-02-17 11:27:31
  • Multiple Updates