ProFTPD mod_tls Module NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

BID:36804

Info

ProFTPD mod_tls Module NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

Bugtraq ID: 36804
Class: Design Error
CVE: CVE-2009-3639
Remote: Yes
Local: No
Published: Oct 23 2009 12:00AM
Updated: Dec 28 2009 07:52AM
Credit: TJ Saunders
Vulnerable: Red Hat Fedora 12
Red Hat Fedora 11
Red Hat Fedora 10
ProFTPD Project ProFTPD 1.3.2 rc3
ProFTPD Project ProFTPD 1.3.2 rc2
ProFTPD Project ProFTPD 1.3.2
ProFTPD Project ProFTPD 1.3.1
ProFTPD Project ProFTPD 1.3 rc3
ProFTPD Project ProFTPD 1.3 a
ProFTPD Project ProFTPD 1.3 .0rc2
ProFTPD Project ProFTPD 1.3 .0rc1
ProFTPD Project ProFTPD 1.3
ProFTPD Project ProFTPD 1.2.10
+ 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
ProFTPD Project ProFTPD 1.2.9 rc3
ProFTPD Project ProFTPD 1.2.9 rc2
ProFTPD Project ProFTPD 1.2.9 rc1
ProFTPD Project ProFTPD 1.2.9
+ Mandriva Linux Mandrake 10.0
+ OpenPKG OpenPKG 2.0
+ OpenPKG OpenPKG 1.3
+ OpenPKG OpenPKG Current
+ Slackware Linux 9.1
+ Slackware Linux 9.0
+ Slackware Linux 8.1
+ Slackware Linux -current
ProFTPD Project ProFTPD 1.2.8 rc2
ProFTPD Project ProFTPD 1.2.8 rc1
ProFTPD Project ProFTPD 1.2.8
+ Slackware Linux 9.0
+ Slackware Linux 8.1
+ Slackware Linux -current
ProFTPD Project ProFTPD 1.2.7 rc3
ProFTPD Project ProFTPD 1.2.7 rc2
ProFTPD Project ProFTPD 1.2.7 rc1
ProFTPD Project ProFTPD 1.2.7
+ Sun Cobalt Qube 3
ProFTPD Project ProFTPD 1.2.6
ProFTPD Project ProFTPD 1.2.5 rc1
ProFTPD Project ProFTPD 1.2.5
ProFTPD Project ProFTPD 1.2.4
+ Debian Linux 3.0 sparc
+ Debian Linux 3.0 s/390
+ Debian Linux 3.0 ppc
+ Debian Linux 3.0 mipsel
+ Debian Linux 3.0 mips
+ Debian Linux 3.0 m68k
+ Debian Linux 3.0 ia-64
+ Debian Linux 3.0 ia-32
+ Debian Linux 3.0 hppa
+ Debian Linux 3.0 arm
+ Debian Linux 3.0 alpha
+ Debian Linux 3.0
ProFTPD Project ProFTPD 1.2.3
ProFTPD Project ProFTPD 1.2.2 rc3
ProFTPD Project ProFTPD 1.2.2 rc1
ProFTPD Project ProFTPD 1.2.2
ProFTPD Project ProFTPD 1.2.1
ProFTPD Project ProFTPD 1.2 pre9
ProFTPD Project ProFTPD 1.2 pre8
ProFTPD Project ProFTPD 1.2 pre7
ProFTPD Project ProFTPD 1.2 pre6
ProFTPD Project ProFTPD 1.2 pre5
ProFTPD Project ProFTPD 1.2 pre4
ProFTPD Project ProFTPD 1.2 pre3
ProFTPD Project ProFTPD 1.2 pre2
ProFTPD Project ProFTPD 1.2 pre11
ProFTPD Project ProFTPD 1.2 pre10
ProFTPD Project ProFTPD 1.2 pre1
ProFTPD Project ProFTPD 1.2 .0rc3
+ Conectiva Linux 7.0
+ Conectiva Linux 6.0
+ Conectiva Linux 5.1
+ Conectiva Linux 5.0
+ Conectiva Linux graficas
+ Conectiva Linux ecommerce
+ Mandriva Linux Mandrake 8.1 ia64
+ Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0 ppc
+ Mandriva Linux Mandrake 8.0
+ Mandriva Linux Mandrake 7.2
ProFTPD Project ProFTPD 1.2 .0rc2
ProFTPD Project ProFTPD 1.2 .0rc1
ProFTPD Project ProFTPD 1.2
+ Cobalt Qube 3.0
+ Cobalt Qube 2.0
+ Cobalt RaQ 3.0
+ Cobalt RaQ 2.0
+ Cobalt RaQ 1.1
Mandriva Linux Mandrake 2009.1 x86_64
Mandriva Linux Mandrake 2009.1
Mandriva Linux Mandrake 2009.0 x86_64
Mandriva Linux Mandrake 2009.0
MandrakeSoft Enterprise Server 5 x86_64
MandrakeSoft Enterprise Server 5
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
MandrakeSoft Corporate Server 4.0
Debian Linux 5.0 sparc
Debian Linux 5.0 s/390
Debian Linux 5.0 powerpc
Debian Linux 5.0 mipsel
Debian Linux 5.0 mips
Debian Linux 5.0 m68k
Debian Linux 5.0 ia-64
Debian Linux 5.0 ia-32
Debian Linux 5.0 hppa
Debian Linux 5.0 armel
Debian Linux 5.0 arm
Debian Linux 5.0 amd64
Debian Linux 5.0 alpha
Debian Linux 5.0
Not Vulnerable: ProFTPD Project ProFTPD 1.3.3 rc2
ProFTPD Project ProFTPD 1.3.2b

Discussion

ProFTPD mod_tls Module NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

ProFTPD is prone to a security-bypass vulnerability because the application fails to properly validate the domain name in a signed CA certificate, allowing attackers to substitute malicious SSL certificates for trusted ones.

Successful exploits allow attackers to perform man-in-the-middle attacks or impersonate trusted servers, which will aid in further attacks.

Versions prior to ProFTPD 1.3.2b are vulnerable.

Exploit / POC

ProFTPD mod_tls Module NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

Attackers use man-in-the-middle attacks to exploit this issue.

Solution / Fix

ProFTPD mod_tls Module NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

Solution:
Updates are available. Please see the references for details.


Debian Linux 5.0 ia-64

Debian Linux 5.0 alpha

Debian Linux 5.0 mipsel

Debian Linux 5.0 armel

Debian Linux 5.0

Mandriva Linux Mandrake 2009.0 x86_64

Debian Linux 5.0 mips

Mandriva Linux Mandrake 2009.1

Debian Linux 5.0 sparc

Mandriva Linux Mandrake 2009.1 x86_64

MandrakeSoft Enterprise Server 5 x86_64

Debian Linux 5.0 ia-32

MandrakeSoft Enterprise Server 5

Debian Linux 5.0 s/390

Debian Linux 5.0 hppa

Debian Linux 5.0 m68k

Debian Linux 5.0 arm

Mandriva Linux Mandrake 2009.0

Debian Linux 5.0 amd64

Debian Linux 5.0 powerpc

ProFTPD Project ProFTPD 1.2 .0rc3

ProFTPD Project ProFTPD 1.2 pre9

ProFTPD Project ProFTPD 1.2 .0rc2

ProFTPD Project ProFTPD 1.2 pre7

ProFTPD Project ProFTPD 1.2

ProFTPD Project ProFTPD 1.2 pre10

ProFTPD Project ProFTPD 1.2 pre5

ProFTPD Project ProFTPD 1.2 pre4

ProFTPD Project ProFTPD 1.2 .0rc1

ProFTPD Project ProFTPD 1.2 pre8

ProFTPD Project ProFTPD 1.2 pre11

ProFTPD Project ProFTPD 1.2 pre6

ProFTPD Project ProFTPD 1.2 pre1

ProFTPD Project ProFTPD 1.2 pre3

ProFTPD Project ProFTPD 1.2 pre2

ProFTPD Project ProFTPD 1.2.1

ProFTPD Project ProFTPD 1.2.10

ProFTPD Project ProFTPD 1.2.2 rc1

ProFTPD Project ProFTPD 1.2.2

ProFTPD Project ProFTPD 1.2.2 rc3

ProFTPD Project ProFTPD 1.2.3

ProFTPD Project ProFTPD 1.2.4

ProFTPD Project ProFTPD 1.2.5 rc1

ProFTPD Project ProFTPD 1.2.5

ProFTPD Project ProFTPD 1.2.6

ProFTPD Project ProFTPD 1.2.7 rc2

ProFTPD Project ProFTPD 1.2.7 rc3

ProFTPD Project ProFTPD 1.2.7 rc1

ProFTPD Project ProFTPD 1.2.7

ProFTPD Project ProFTPD 1.2.8

ProFTPD Project ProFTPD 1.2.8 rc2

ProFTPD Project ProFTPD 1.2.8 rc1

ProFTPD Project ProFTPD 1.2.9 rc3

ProFTPD Project ProFTPD 1.2.9 rc2

ProFTPD Project ProFTPD 1.2.9

ProFTPD Project ProFTPD 1.2.9 rc1

ProFTPD Project ProFTPD 1.3 .0rc1

ProFTPD Project ProFTPD 1.3 rc3

ProFTPD Project ProFTPD 1.3 .0rc2

ProFTPD Project ProFTPD 1.3

ProFTPD Project ProFTPD 1.3 a

ProFTPD Project ProFTPD 1.3.1

ProFTPD Project ProFTPD 1.3.2

ProFTPD Project ProFTPD 1.3.2 rc2

ProFTPD Project ProFTPD 1.3.2 rc3

MandrakeSoft Corporate Server 3.0

MandrakeSoft Corporate Server 3.0 x86_64

References

ProFTPD mod_tls Module NULL Character CA SSL Certificate Validation Security Bypass Vulnerability

References:

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