GNUTLS LibTASN1 DER Decoding Denial of Service Vulnerabilities

BID:16568

Info

GNUTLS LibTASN1 DER Decoding Denial of Service Vulnerabilities

Bugtraq ID: 16568
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2006-0645
Remote: Yes
Local: No
Published: Feb 09 2006 12:00AM
Updated: Dec 22 2006 12:04AM
Credit: Evgeny Legerov reported these vulnerabilities to the vendor.
Vulnerable: Ubuntu Ubuntu Linux 5.10 powerpc
Ubuntu Ubuntu Linux 5.10 i386
Ubuntu Ubuntu Linux 5.10 amd64
Ubuntu Ubuntu Linux 5.0 4 powerpc
Ubuntu Ubuntu Linux 5.0 4 i386
Ubuntu Ubuntu Linux 5.0 4 amd64
Ubuntu Ubuntu Linux 4.1 ppc
Ubuntu Ubuntu Linux 4.1 ia64
Ubuntu Ubuntu Linux 4.1 ia32
Trustix Secure Linux 3.0
Trustix Secure Linux 2.2
Trustix Secure Enterprise Linux 2.0
Redhat Fedora Core3
Redhat Enterprise Linux WS 4
Redhat Enterprise Linux ES 4
Redhat Enterprise Linux AS 4
Redhat Desktop 4.0
Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
Mandriva Linux Mandrake 10.2 x86_64
Mandriva Linux Mandrake 10.2
Mandriva Linux Mandrake 10.1 x86_64
Mandriva Linux Mandrake 10.1
GNU Libtasn1 0.2.17
GNU Libtasn1 0.2.16
GNU Libtasn1 0.2.15
GNU Libtasn1 0.2.14
GNU Libtasn1 0.2.13
GNU Libtasn1 0.2.12
GNU Libtasn1 0.2.11
GNU Libtasn1 0.2.10
GNU Libtasn1 0.2.9
GNU Libtasn1 0.2.8
GNU Libtasn1 0.2.7
GNU Libtasn1 0.2.6
GNU Libtasn1 0.2.5
GNU Libtasn1 0.2.4
GNU Libtasn1 0.2.3
GNU Libtasn1 0.2.2
GNU Libtasn1 0.2.1
GNU Libtasn1 0.2
GNU Libtasn1 0.1.2
GNU Libtasn1 0.1.1
GNU Libtasn1 0.1
GNU GnuTLS 1.3.3
GNU GnuTLS 1.3.2
GNU GnuTLS 1.3.1
GNU GnuTLS 1.3
GNU GnuTLS 1.2.9
GNU GnuTLS 1.2.8
GNU GnuTLS 1.2.7
GNU GnuTLS 1.2.6
GNU GnuTLS 1.2.5
GNU GnuTLS 1.2.4
GNU GnuTLS 1.2.3
GNU GnuTLS 1.2.2
GNU GnuTLS 1.2.1
GNU GnuTLS 1.2
GNU GnuTLS 1.0.25
+ Redhat Fedora Core4
 GNU GnuTLS 1.0.23
+ Redhat Fedora Core4
 GNU GnuTLS 1.0.17
GNU GnuTLS 1.0.16
GNU GnuTLS 1.0.15
GNU GnuTLS 1.0.14
GNU GnuTLS 1.0.13
GNU GnuTLS 1.0.9
GNU GnuTLS 1.0.8
GNU GnuTLS 1.0.7
GNU GnuTLS 1.0.6
GNU GnuTLS 1.0.5
GNU GnuTLS 1.0.4
GNU GnuTLS 1.0.3
GNU GnuTLS 1.0.2
GNU GnuTLS 1.0.1
GNU GnuTLS 1.0
Gentoo Linux
Debian Linux 3.1 sparc
Debian Linux 3.1 s/390
Debian Linux 3.1 ppc
Debian Linux 3.1 mipsel
Debian Linux 3.1 mips
Debian Linux 3.1 m68k
Debian Linux 3.1 ia-64
Debian Linux 3.1 ia-32
Debian Linux 3.1 hppa
Debian Linux 3.1 arm
Debian Linux 3.1 amd64
Debian Linux 3.1 alpha
Debian Linux 3.1
Not Vulnerable: GNU Libtasn1 0.2.18
GNU GnuTLS 1.3.4
GNU GnuTLS 1.2.10

Discussion

GNUTLS LibTASN1 DER Decoding Denial of Service Vulnerabilities

Libtasn1 is prone to multiple denial-of-service vulnerabilities. A remote attacker can send specifically crafted data to trigger these flaws, leading to denial-of-service condition.

These issues have been addressed in Libtasn1 versions 0.2.18; earlier versions are vulnerable.

Exploit / POC

GNUTLS LibTASN1 DER Decoding Denial of Service Vulnerabilities

Example code designed to trigger these issues is available as a regression test file and is provided from the vendor at the following URI:

http://josefsson.org/cgi-bin/viewcvs.cgi/gnutls/tests/certder.c?view=markup

The ProtoVer SSL Testsuite from http://www.gleg.net/protover_ssl.shtml may also be used to trigger these issues.

Solution / Fix

GNUTLS LibTASN1 DER Decoding Denial of Service Vulnerabilities

Solution:
The vendor has addressed this issue in GnuTLS versions 1.2.10 and 1.3.4 and in Libtasn1 version 0.2.18.

Please see the referenced vendor advisories for details on obtaining and applying fixes.


GNU Libtasn1 0.1

GNU Libtasn1 0.1.1

GNU Libtasn1 0.1.2

GNU Libtasn1 0.2

GNU Libtasn1 0.2.1

GNU Libtasn1 0.2.10

GNU Libtasn1 0.2.11

GNU Libtasn1 0.2.12

GNU Libtasn1 0.2.13

GNU Libtasn1 0.2.14

GNU Libtasn1 0.2.15

GNU Libtasn1 0.2.16

GNU Libtasn1 0.2.17

GNU Libtasn1 0.2.2

GNU Libtasn1 0.2.3

GNU Libtasn1 0.2.4

GNU Libtasn1 0.2.5

GNU Libtasn1 0.2.6

GNU Libtasn1 0.2.7

GNU Libtasn1 0.2.8

GNU GnuTLS 1.0

GNU GnuTLS 1.0.1

GNU GnuTLS 1.0.13

GNU GnuTLS 1.0.14

GNU GnuTLS 1.0.15

GNU GnuTLS 1.0.16

GNU GnuTLS 1.0.17

GNU GnuTLS 1.0.2

GNU GnuTLS 1.0.23

GNU GnuTLS 1.0.25

GNU GnuTLS 1.0.3

GNU GnuTLS 1.0.4

GNU GnuTLS 1.0.5

GNU GnuTLS 1.0.6

GNU GnuTLS 1.0.7

GNU GnuTLS 1.0.8

GNU GnuTLS 1.0.9

GNU GnuTLS 1.2

GNU GnuTLS 1.2.1

GNU GnuTLS 1.2.2

GNU GnuTLS 1.2.3

GNU GnuTLS 1.2.4

GNU GnuTLS 1.2.5

GNU GnuTLS 1.2.6

GNU GnuTLS 1.2.7

GNU GnuTLS 1.2.9

GNU GnuTLS 1.3

GNU GnuTLS 1.3.1

GNU GnuTLS 1.3.2

GNU GnuTLS 1.3.3

References

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