Apache HTTP Server 'ap_pregsub()' Function Local Denial of Service Vulnerability

BID:50639

Info

Apache HTTP Server 'ap_pregsub()' Function Local Denial of Service Vulnerability

Bugtraq ID: 50639
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2011-4415
Remote: No
Local: Yes
Published: Nov 10 2011 12:00AM
Updated: May 10 2013 07:02AM
Credit: halfdog
Vulnerable: HP System Management Homepage 7.0
HP System Management Homepage 6.3
HP System Management Homepage 6.2
HP System Management Homepage 6.1
HP System Management Homepage 6.0
Apache Software Foundation Apache 2.2.15
Apache Software Foundation Apache 2.2.14
Apache Software Foundation Apache 2.2.13
Apache Software Foundation Apache 2.2.12
Apache Software Foundation Apache 2.2.11
Apache Software Foundation Apache 2.2.10
Apache Software Foundation Apache 2.2.9
+ Adobe Flash Media Server 3.5.3
+ Adobe Flash Media Server 3.5.2
+ Adobe Flash Media Server 3.5.1
Apache Software Foundation Apache 2.2.8
Apache Software Foundation Apache 2.2.6
Apache Software Foundation Apache 2.2.5
Apache Software Foundation Apache 2.2.4
Apache Software Foundation Apache 2.2.3
Apache Software Foundation Apache 2.2
Apache Software Foundation Apache 2.0.63
Apache Software Foundation Apache 2.0.61
Apache Software Foundation Apache 2.0.60
Apache Software Foundation Apache 2.0.59
Apache Software Foundation Apache 2.0.58
+ 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 Software Foundation Apache 2.0.57
Apache Software Foundation Apache 2.0.56
Apache Software Foundation Apache 2.0.55
Apache Software Foundation 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 Software Foundation Apache 2.0.53
Apache Software Foundation Apache 2.0.52
+ Apple Mac OS X 10.3.6
+ Apple Mac OS X 10.2.8
+ Apple Mac OS X Server 10.3.6
+ Apple Mac OS X Server 10.2.8
+ Red Hat Enterprise Linux AS 4
 + RedHat Desktop 4.0
+ RedHat Enterprise Linux ES 4
 + RedHat Enterprise Linux WS 4
 + Sun Solaris 10
 Apache Software Foundation Apache 2.0.51
+ Red Hat Fedora Core2
 + Red Hat Fedora Core1
 Apache Software Foundation Apache 2.0.50
+ Mandriva Linux Mandrake 10.1 x86_64
 + Mandriva Linux Mandrake 10.1
Apache Software Foundation Apache 2.0.49
+ S.u.S.E. Linux Personal 9.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Apache Software Foundation Apache 2.0.48
+ Mandriva Linux Mandrake 10.0 AMD64
 + Mandriva Linux Mandrake 10.0
+ S.u.S.E. Linux 8.1
+ 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
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Apache Software Foundation Apache 2.0.47
+ 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 Server 10.2.8
+ Apple Mac OS X Server 10.2.7
+ Apple Mac OS X Server 10.2.6
+ Apple Mac OS X Server 10.2.5
+ Apple Mac OS X Server 10.2.4
+ Apple Mac OS X Server 10.2.3
+ Apple Mac OS X Server 10.2.2
+ Apple Mac OS X Server 10.2.1
+ Apple Mac OS X Server 10.2
+ Apple Mac OS X Server 10.1.5
+ Apple Mac OS X Server 10.1.4
+ Apple Mac OS X Server 10.1.3
+ Apple Mac OS X Server 10.1.2
+ Apple Mac OS X Server 10.1.1
+ Apple Mac OS X Server 10.1
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
Apache Software Foundation Apache 2.0.46
+ Red Hat Enterprise Linux AS 3
 + RedHat Desktop 3.0
+ RedHat Enterprise Linux ES 3
 + RedHat Enterprise Linux WS 3
 + Trustix Secure Linux 2.0
Apache Software Foundation Apache 2.0.45
- Apple Mac OS X 10.2.6
- Apple Mac OS X 10.2.5
- Apple Mac OS X 10.2.4
- Apple Mac OS X 10.2.3
- Apple Mac OS X 10.2.2
- Apple Mac OS X 10.2.1
- Apple Mac OS X 10.2
- Apple Mac OS X 10.1.5
- Apple Mac OS X 10.1.4
- Apple Mac OS X 10.1.3
- Apple Mac OS X 10.1.2
- Apple Mac OS X 10.1.1
- Apple Mac OS X 10.1
- Apple Mac OS X 10.1
- Apple Mac OS X 10.0.4
- Apple Mac OS X 10.0.3
- Apple Mac OS X 10.0.2
- Apple Mac OS X 10.0.1
- Apple Mac OS X 10.0
+ Conectiva Linux 9.0
Apache Software Foundation Apache 2.0.44
Apache Software Foundation Apache 2.0.43
Apache Software Foundation Apache 2.0.42
+ Gentoo Linux 1.4 _rc1
 + Gentoo Linux 1.2
Apache Software Foundation Apache 2.0.41
Apache Software Foundation Apache 2.0.40
+ RedHat Linux 9.0 i386
 + RedHat Linux 8.0
+ Terra Soft Solutions Yellow Dog Linux 3.0
Apache Software Foundation Apache 2.0.39
Apache Software Foundation Apache 2.0.38
Apache Software Foundation Apache 2.0.37
Apache Software Foundation Apache 2.0.36
Apache Software Foundation Apache 2.0.35
Apache Software Foundation Apache 2.0
Apache Software Foundation Apache 2.2.21
Apache Software Foundation Apache 2.2.20
Apache Software Foundation Apache 2.2.19
Apache Software Foundation Apache 2.2.18
Apache Software Foundation Apache 2.2.17
Apache Software Foundation Apache 2.2.16
Apache Software Foundation Apache 2.2.1
Apache Software Foundation Apache 2.2
Apache Software Foundation Apache 2.0.64
Not Vulnerable:

Discussion

Apache HTTP Server 'ap_pregsub()' Function Local Denial of Service Vulnerability

Apache HTTP Server is prone to a local denial-of-service vulnerability because of a NULL-pointer dereference error or a memory exhaustion.

Local attackers can exploit this issue to trigger a NULL-pointer dereference or memory exhaustion, and cause a server crash, denying service to legitimate users.

Note: To trigger this issue, 'mod_setenvif' must be enabled and the attacker should be able to place a malicious '.htaccess' file on the affected webserver.

Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21 are vulnerable. Other versions may also be affected.

Exploit / POC

Apache HTTP Server 'ap_pregsub()' Function Local Denial of Service Vulnerability

Attackers need local interactive access to exploit this issue.

Solution / Fix

Apache HTTP Server 'ap_pregsub()' Function Local Denial of Service Vulnerability

Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

References

Apache HTTP Server 'ap_pregsub()' Function Local Denial of Service Vulnerability

References:
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