Executive Summary

Summary
Title Sun Alert 260528 Security Vulnerability in the GnuTLS (libgnutls(3)) Library Certificate Chain Validation
Informations
Name SUN-260528 First vendor Publication 2009-06-10
Vendor Sun Last vendor Modification 2009-06-10
Severity (Vendor) N/A Revision N/A

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:N/I:P/A:N)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Product: Solaris 10 Operating System OpenSolaris

A Security vulnerability in GnuTLS (libgnutls(3)) library X.509 certificate chain validation may cause client applications to trust certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate. This may allow a remote unprivileged user to carry out man-in-the-middle type of attacks using forged serer certificates.

Evolution(evolution(1)) and Remote Desktop Applications are examples of applications which use this vulnerable library.

This vulnerability is also described in the following document:
State: Resolved
First released: 10-Jun-2009

Original Source

Url : http://blogs.sun.com/security/entry/sun_alert_260528_security_vulnerability

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-255 Credentials Management

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:11650
 
Oval ID: oval:org.mitre.oval:def:11650
Title: The _gnutls_x509_verify_certificate function in lib/x509/verify.c in libgnutls in GnuTLS before 2.6.1 trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate, which allows man-in-the-middle attackers to insert a spoofed certificate for any Distinguished Name (DN).
Description: The _gnutls_x509_verify_certificate function in lib/x509/verify.c in libgnutls in GnuTLS before 2.6.1 trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate, which allows man-in-the-middle attackers to insert a spoofed certificate for any Distinguished Name (DN).
Family: unix Class: vulnerability
Reference(s): CVE-2008-4989
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:12790
 
Oval ID: oval:org.mitre.oval:def:12790
Title: DSA-1719-1 gnutls13 -- design flaw
Description: Martin von Gagern discovered that GNUTLS, an implementation of the TLS/SSL protocol, handles verification of X.509 certificate chains incorrectly if a self-signed certificate is configured as a trusted certificate. This could cause clients to accept forged server certificates as genuine. In addition, this update tightens the checks for X.509v1 certificates which causes GNUTLS to reject certain certificate chains it accepted before. For the stable distribution, this problem has been fixed in version 1.4.4-3+etch3. For the unstable distribution, this problem has been fixed in version 2.4.2-3 of the gnutls26 package. We recommend that you upgrade your gnutls13 packages.
Family: unix Class: patch
Reference(s): DSA-1719-1
CVE-2008-4989
Version: 5
Platform(s): Debian GNU/Linux 4.0
Product(s): gnutls13
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:13629
 
Oval ID: oval:org.mitre.oval:def:13629
Title: DSA-1719-2 gnutls13, gnutls26 -- design flaw
Description: Changes in DSA-1719-1 caused GNUTLS to reject X.509v1 certificates as CA root certificates by default, as originally described in the documentation. However, it turned out that there is still significant use of historic X.509v1 CA root certificates, so this constitutes an unacceptable regression. This update reverses this part of the changes in DSA-1719-1. Note that the X.509v1 certificate format does not distinguish between server and CA certificates, which means that an X.509v1 server certificates is implicitly converted into a CA certificate when added to the trust store. The current stable distribution was released with the changes in DSA-1719-1 already applied, and this update reverses the changes concerning X.509v1 CA certificates for this distribution, too. For the old stable distribution, this problem has been fixed in version 1.4.4-3+etch4. For the stable distribution, this problem has been fixed in version 2.4.2-6+lenny1. We recommend that you upgrade your GNUTLS packages.
Family: unix Class: patch
Reference(s): DSA-1719-2
CVE-2008-4989
Version: 5
Platform(s): Debian GNU/Linux 5.0
Debian GNU/Linux 4.0
Product(s): gnutls13
gnutls26
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:13825
 
Oval ID: oval:org.mitre.oval:def:13825
Title: USN-809-1 -- gnutls12, gnutls13, gnutls26 vulnerabilities
Description: Moxie Marlinspike and Dan Kaminsky independently discovered that GnuTLS did not properly handle certificates with NULL characters in the certificate name. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. Dan Kaminsky discovered GnuTLS would still accept certificates with MD2 hash signatures. As a result, an attacker could potentially create a malicious trusted certificate to impersonate another site. This issue only affected Ubuntu 6.06 LTS and Ubuntu 8.10. USN-678-1 fixed a vulnerability and USN-678-2 a regression in GnuTLS. The upstream patches introduced a regression when validating certain certificate chains that would report valid certificates as untrusted. This update fixes the problem, and only affected Ubuntu 6.06 LTS and Ubuntu 8.10 . In an effort to maintain a strong security stance and address all known regressions, this update deprecates X.509 validation chains using MD2 and MD5 signatures. To accomodate sites which must still use a deprected RSA-MD5 certificate, GnuTLS has been updated to stop looking when it has found a trusted intermediary certificate. This new handling of intermediary certificates is in accordance with other SSL implementations. Original advisory details: Martin von Gagern discovered that GnuTLS did not properly verify certificate chains when the last certificate in the chain was self-signed. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information
Family: unix Class: patch
Reference(s): USN-809-1
CVE-2009-2730
CVE-2009-2409
CVE-2008-4989
Version: 5
Platform(s): Ubuntu 8.04
Ubuntu 9.04
Ubuntu 6.06
Ubuntu 8.10
Product(s): gnutls12
gnutls13
gnutls26
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:17801
 
Oval ID: oval:org.mitre.oval:def:17801
Title: USN-678-2 -- gnutls12, gnutls13, gnutls26 regression
Description: USN-678-1 fixed a vulnerability in GnuTLS.
Family: unix Class: patch
Reference(s): USN-678-2
CVE-2008-4989
Version: 7
Platform(s): Ubuntu 6.06
Ubuntu 7.10
Ubuntu 8.04
Ubuntu 8.10
Product(s): gnutls12
gnutls13
gnutls26
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:17875
 
Oval ID: oval:org.mitre.oval:def:17875
Title: USN-678-1 -- gnutls12, gnutls13, gnutls26 vulnerability
Description: Martin von Gagern discovered that GnuTLS did not properly verify certificate chains when the last certificate in the chain was self-signed.
Family: unix Class: patch
Reference(s): USN-678-1
CVE-2008-4989
Version: 7
Platform(s): Ubuntu 6.06
Ubuntu 7.10
Ubuntu 8.04
Ubuntu 8.10
Product(s): gnutls12
gnutls13
gnutls26
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22750
 
Oval ID: oval:org.mitre.oval:def:22750
Title: ELSA-2008:0982: gnutls security update (Moderate)
Description: The _gnutls_x509_verify_certificate function in lib/x509/verify.c in libgnutls in GnuTLS before 2.6.1 trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate, which allows man-in-the-middle attackers to insert a spoofed certificate for any Distinguished Name (DN).
Family: unix Class: patch
Reference(s): ELSA-2008:0982-01
CVE-2008-4989
Version: 6
Platform(s): Oracle Linux 5
Product(s): gnutls
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:29020
 
Oval ID: oval:org.mitre.oval:def:29020
Title: RHSA-2008:0982 -- gnutls security update (Moderate)
Description: Updated gnutls packages that fix a security issue are now available for Red Hat Enterprise Linux 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS). Martin von Gagern discovered a flaw in the way GnuTLS verified certificate chains provided by a server. A malicious server could use this flaw to spoof its identity by tricking client applications using the GnuTLS library to trust invalid certificates. (CVE-2008-4989) Users of GnuTLS are advised to upgrade to these updated packages, which contain a backported patch that corrects this issue.
Family: unix Class: patch
Reference(s): RHSA-2008:0982
CESA-2008:0982-CentOS 5
CVE-2008-4989
Version: 3
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Product(s): gnutls
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:7938
 
Oval ID: oval:org.mitre.oval:def:7938
Title: DSA-1719 gnutls13 -- design flaw
Description: Martin von Gagern discovered that GNUTLS, an implementation of the TLS/SSL protocol, handles verification of X.509 certificate chains incorrectly if a self-signed certificate is configured as a trusted certificate. This could cause clients to accept forged server certificates as genuine. (CVE-2008-4989) In addition, this update tightens the checks for X.509v1 certificates which causes GNUTLS to reject certain certificate chains it accepted before. (In certificate chain processing, GNUTLS does not recognize X.509v1 certificates as valid unless explicitly requested by the application.)
Family: unix Class: patch
Reference(s): DSA-1719
CVE-2008-4989
Version: 3
Platform(s): Debian GNU/Linux 4.0
Product(s): gnutls13
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 116

OpenVAS Exploits

Date Description
2009-10-13 Name : SLES10: Security update for GnuTLS
File : nvt/sles10_gnutls2.nasl
2009-10-13 Name : SLES10: Security update for GnuTLS
File : nvt/sles10_gnutls0.nasl
2009-10-11 Name : SLES11: Security update for GnuTLS
File : nvt/sles11_gnutls.nasl
2009-09-28 Name : Fedora Core 10 FEDORA-2009-8622 (gnutls)
File : nvt/fcore_2009_8622.nasl
2009-09-23 Name : Solaris Update for GNU Transport Layer Security Library 123939-02
File : nvt/gb_solaris_123939_02.nasl
2009-09-23 Name : Solaris Update for GNOME 2.6.0 123938-02
File : nvt/gb_solaris_123938_02.nasl
2009-09-02 Name : Ubuntu USN-809-1 (gnutls26)
File : nvt/ubuntu_809_1.nasl
2009-04-28 Name : SuSE Security Summary SUSE-SR:2009:009
File : nvt/suse_sr_2009_009.nasl
2009-04-09 Name : Mandriva Update for gnutls MDVSA-2008:227-1 (gnutls)
File : nvt/gb_mandriva_MDVSA_2008_227_1.nasl
2009-04-09 Name : Mandriva Update for gnutls MDVSA-2008:227 (gnutls)
File : nvt/gb_mandriva_MDVSA_2008_227.nasl
2009-03-23 Name : Ubuntu Update for gnutls12, gnutls13, gnutls26 vulnerability USN-678-1
File : nvt/gb_ubuntu_USN_678_1.nasl
2009-03-23 Name : Ubuntu Update for gnutls12, gnutls13, gnutls26 regression USN-678-2
File : nvt/gb_ubuntu_USN_678_2.nasl
2009-03-20 Name : Debian Security Advisory DSA 1719-2 (gnutls13, gnutls26)
File : nvt/deb_1719_2.nasl
2009-03-06 Name : RedHat Update for gnutls RHSA-2008:0982-01
File : nvt/gb_RHSA-2008_0982-01_gnutls.nasl
2009-02-17 Name : Fedora Update for gnutls FEDORA-2008-9600
File : nvt/gb_fedora_2008_9600_gnutls_fc8.nasl
2009-02-17 Name : Fedora Update for gnutls FEDORA-2008-9530
File : nvt/gb_fedora_2008_9530_gnutls_fc9.nasl
2009-02-16 Name : Fedora Update for gnutls FEDORA-2008-10000
File : nvt/gb_fedora_2008_10000_gnutls_fc10.nasl
2009-02-13 Name : Debian Security Advisory DSA 1719-1 (gnutls13)
File : nvt/deb_1719_1.nasl
2009-01-20 Name : Gentoo Security Advisory GLSA 200901-10 (gnutls)
File : nvt/glsa_200901_10.nasl
2008-11-19 Name : FreeBSD Ports: gnutls
File : nvt/freebsd_gnutls3.nasl
0000-00-00 Name : Slackware Advisory SSA:2008-315-01 gnutls
File : nvt/esoft_slk_ssa_2008_315_01.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
49851 GnuTLS libgnutls lib/x509/verify.c _gnutls_x509_verify_certificate Function X...

Nessus® Vulnerability Scanner

Date Description
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2008-0982.nasl - Type : ACT_GATHER_INFO
2012-09-24 Name : The remote Fedora host is missing a security update.
File : fedora_2008-10162.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20081111_gnutls_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2010-01-06 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2008-0982.nasl - Type : ACT_GATHER_INFO
2009-09-24 Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_gnutls-6073.nasl - Type : ACT_GATHER_INFO
2009-09-24 Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_gnutls-5851.nasl - Type : ACT_GATHER_INFO
2009-09-24 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_gnutls-090317.nasl - Type : ACT_GATHER_INFO
2009-08-20 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-809-1.nasl - Type : ACT_GATHER_INFO
2009-07-21 Name : The remote openSUSE host is missing a security update.
File : suse_11_0_gnutls-081204.nasl - Type : ACT_GATHER_INFO
2009-07-21 Name : The remote openSUSE host is missing a security update.
File : suse_11_0_gnutls-090313.nasl - Type : ACT_GATHER_INFO
2009-07-21 Name : The remote openSUSE host is missing a security update.
File : suse_11_1_gnutls-090313.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2008-227.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-678-2.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-678-1.nasl - Type : ACT_GATHER_INFO
2009-04-21 Name : The remote openSUSE host is missing a security update.
File : suse_gnutls-6079.nasl - Type : ACT_GATHER_INFO
2009-02-12 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-1719.nasl - Type : ACT_GATHER_INFO
2009-01-15 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200901-10.nasl - Type : ACT_GATHER_INFO
2008-12-10 Name : The remote openSUSE host is missing a security update.
File : suse_gnutls-5844.nasl - Type : ACT_GATHER_INFO
2008-11-17 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_45298931b3bf11dd80f8001cc0377035.nasl - Type : ACT_GATHER_INFO
2008-11-12 Name : The remote Fedora host is missing a security update.
File : fedora_2008-9600.nasl - Type : ACT_GATHER_INFO
2008-11-12 Name : The remote Fedora host is missing a security update.
File : fedora_2008-9530.nasl - Type : ACT_GATHER_INFO
2008-11-12 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2008-0982.nasl - Type : ACT_GATHER_INFO
2008-11-11 Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2008-315-01.nasl - Type : ACT_GATHER_INFO
2007-02-18 Name : The remote host is missing Sun Security Patch number 123939-05
File : solaris10_x86_123939.nasl - Type : ACT_GATHER_INFO
2007-02-18 Name : The remote host is missing Sun Security Patch number 123938-05
File : solaris10_123938.nasl - Type : ACT_GATHER_INFO