Apache Mod_SSL SSLVerifyClient Restriction Bypass Vulnerability

BID:14721

Info

Apache Mod_SSL SSLVerifyClient Restriction Bypass Vulnerability

Bugtraq ID: 14721
Class: Design Error
CVE: CVE-2005-2700
Remote: Yes
Local: No
Published: Sep 01 2005 12:00AM
Updated: May 06 2008 03:35AM
Credit: The discoverer of this issue is currently unknown.
Vulnerable: 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
Turbolinux Turbolinux Workstation 8.0
Turbolinux Turbolinux Workstation 7.0
Turbolinux Turbolinux Server 10.0
Turbolinux Turbolinux Server 8.0
Turbolinux Turbolinux Server 7.0
Turbolinux Turbolinux Desktop 10.0
Turbolinux Turbolinux 10 F...
TurboLinux Personal
TurboLinux Multimedia
Turbolinux Home
Trustix Secure Linux 3.0
Trustix Secure Linux 2.2
Trustix Secure Enterprise Linux 2.0
SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE Linux Enterprise Server 9
Sun Solaris 9_x86
Sun Solaris 9
Sun Solaris 8_x86
Sun Solaris 8_sparc
Sun Solaris 10.0_x86
Sun Solaris 10
Slackware Linux 10.1
Slackware Linux 10.0
Slackware Linux 9.1
Slackware Linux 9.0
Slackware Linux 8.1
Slackware Linux -current
SGI ProPack 3.0 SP6
S.u.S.E. tomboy 10.0
S.u.S.E. Open-Enterprise-Server 9.0
S.u.S.E. Linux Professional 10.0
S.u.S.E. Linux Professional 9.3 x86_64
S.u.S.E. Linux Professional 9.3
S.u.S.E. Linux Professional 9.2 x86_64
S.u.S.E. Linux Professional 9.2
S.u.S.E. Linux Professional 9.1 x86_64
S.u.S.E. Linux Professional 9.1
S.u.S.E. Linux Professional 9.0 x86_64
S.u.S.E. Linux Professional 9.0
S.u.S.E. Linux Personal 9.3 x86_64
S.u.S.E. Linux Personal 9.3
S.u.S.E. Linux Personal 9.2 x86_64
S.u.S.E. Linux Personal 9.2
S.u.S.E. Linux Personal 9.1 x86_64
Redhat Stronghold 4.0
Redhat Enterprise Linux WS 4
Redhat Enterprise Linux WS 3
Redhat Enterprise Linux ES 4
Redhat Enterprise Linux ES 3
Redhat Enterprise Linux AS 4
Redhat Enterprise Linux AS 3
Redhat Desktop 4.0
Redhat Desktop 3.0
MandrakeSoft Multi Network Firewall 2.0
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
IBM Hardware Management Console (HMC) for pSeries 6.0 R1.0
IBM Hardware Management Console (HMC) for iSeries 6.0 R1.0
HP HP-UX B.11.23
HP HP-UX B.11.22
HP HP-UX B.11.11
HP HP-UX B.11.00
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
Avaya Integrated Management 2.1
Avaya Integrated Management
Avaya CVLAN
Apple Mac OS X Server 10.4.3
Apple Mac OS X Server 10.4.2
Apple Mac OS X Server 10.4.1
Apple Mac OS X Server 10.4
Apple Mac OS X Server 10.3.9
Apple Mac OS X Server 10.3.8
Apple Mac OS X Server 10.3.7
Apple Mac OS X Server 10.3.6
Apple Mac OS X Server 10.3.5
Apple Mac OS X Server 10.3.4
Apple Mac OS X Server 10.3.3
Apple Mac OS X Server 10.3.2
Apple Mac OS X Server 10.3.1
Apple Mac OS X Server 10.3
Apple Mac OS X 10.4.3
Apple Mac OS X 10.4.2
Apple Mac OS X 10.4.1
Apple Mac OS X 10.4
Apple Mac OS X 10.3.9
Apple Mac OS X 10.3.8
Apple Mac OS X 10.3.7
Apple Mac OS X 10.3.6
Apple Mac OS X 10.3.5
Apple Mac OS X 10.3.4
Apple Mac OS X 10.3.3
Apple Mac OS X 10.3.2
Apple Mac OS X 10.3.1
Apple Mac OS X 10.3
Apache Apache 2.1.7
Apache Apache 2.1.6
Apache Apache 2.1.5
Apache Apache 2.1.4
Apache Apache 2.1.3
Apache Apache 2.1.2
Apache Apache 2.1.1
Apache Apache 2.1
Apache Apache 2.0.54
+ 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
Apache Apache 2.0.53
Apache Apache 2.0.52
Apache Apache 2.0.51
Apache Apache 2.0.50
Apache Apache 2.0.49
+ S.u.S.E. Linux Personal 9.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Apache Apache 2.0.48
+ Mandriva Linux Mandrake 10.0 AMD64
+ Mandriva Linux Mandrake 10.0
+ S.u.S.E. Linux Personal 9.0 x86_64
+ S.u.S.E. Linux Personal 9.0
+ S.u.S.E. Linux Personal 8.2
+ SuSE Linux 8.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Apache Apache 2.0.47
Apache Apache 2.0.46
Apache Apache 2.0.45
Apache Apache 2.0.44
Apache Apache 2.0.43
Apache Apache 2.0.42
Apache Apache 2.0.41
Apache Apache 2.0.40
+ Redhat Linux 9.0 i386
+ Redhat Linux 8.0
+ Terra Soft Solutions Yellow Dog Linux 3.0
Apache Apache 2.0.39
Apache Apache 2.0.38
Apache Apache 2.0.37
Apache Apache 2.0.36
Apache Apache 2.0.35
Apache Apache 2.0.32
Apache Apache 2.0.28 Beta
Apache Apache 2.0.28
Apache Apache 2.0 a9
Apache Apache 2.0
Not Vulnerable: Apache Apache 2.1.8
Apache Apache 2.0.55

Discussion

Apache Mod_SSL SSLVerifyClient Restriction Bypass Vulnerability

Apache 2.x mod_ssl is prone to a restriction-bypass vulnerability that presents itself when mod_ssl is configured to be used with the 'SSLVerifyClient' directive.

This issue allows attackers to bypass security policies to gain access to locations that are configured to be forbidden for clients without a valid client certificate.

Exploit / POC

Apache Mod_SSL SSLVerifyClient Restriction Bypass Vulnerability

An exploit is not required to leverage this issue.

Solution / Fix

Apache Mod_SSL SSLVerifyClient Restriction Bypass Vulnerability

Solution:
Please see the attached vendor advisories for more information.


Sun Solaris 10

Slackware Linux -current

Apple Mac OS X 10.3.1

Apple Mac OS X Server 10.3.2

Apple Mac OS X 10.3.3

Apple Mac OS X Server 10.3.4

Apple Mac OS X 10.3.4

Apple Mac OS X Server 10.3.5

Apple Mac OS X Server 10.3.6

Apple Mac OS X Server 10.3.7

Apple Mac OS X 10.3.7

Apple Mac OS X 10.3.8

Apple Mac OS X Server 10.3.8

Apple Mac OS X Server 10.3.9

Apple Mac OS X 10.3.9

Apple Mac OS X Server 10.4

Apple Mac OS X 10.4

Apple Mac OS X Server 10.4.1

Apple Mac OS X 10.4.2

Apple Mac OS X Server 10.4.3

Apple Mac OS X 10.4.3

Apache Apache 2.0 a9

Apache Apache 2.0.28 Beta

Apache Apache 2.0.28

Apache Apache 2.0.37

Apache Apache 2.0.38

Apache Apache 2.0.39

Apache Apache 2.0.40

Apache Apache 2.0.44

Apache Apache 2.0.48

Apache Apache 2.0.49

Apache Apache 2.0.53

Apache Apache 2.0.54

Apache Apache 2.1

Apache Apache 2.1.1

Apache Apache 2.1.3

Apache Apache 2.1.6

SGI ProPack 3.0 SP6

References

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