Title: Apache Mod ReWrite Rules Bypassing Image Linking Vulnerability
Severity: MODERATE
Description:
Apache is a freely available, widely used web server distributed and maintained by the Apache Server Project.
A problem has been discovered that may allow remote users to link files and images even if mod_rewrite is used. The problem is likely in the handling of file names by the the file system on most UNIX implementations.
mod_rewrite rules are normally used to prevent web servers outside of the local host from linking images and files, preventing a load increase on the local host and network capacity increase.
A typical mod_rewrite rule looks like the following:
RewriteCond %{HTTP_REFERER} !^http://www\.yoursite\.com.*$
RewriteRule ^/images/.* - [G]
However, when a HTTP GET request for the //images directory is made to the server, it does not match the above rule, thus allowing a user to directly access the image.
This could allow for the bypassing of mod_rewrite rules, which may lead to increased server load, increased load on local network resources, and potentially denial of service.
Affected Products:
- Apache Software Foundation Apache 1.3.14
- Apache Software Foundation Apache 1.3.17
- Apache Software Foundation Apache 1.3.19
- Apache Software Foundation Apache 1.3.20
- Debian Linux 2.3.0
- EnGarde Secure Linux 1.0.1
- HP Secure OS software for Linux 1.0.0
- IBM HTTP Server 1.3.19
- MandrakeSoft Corporate Server 1.0.1
- MandrakeSoft Linux Mandrake 7.1.0
- MandrakeSoft Linux Mandrake 7.2.0
- MandrakeSoft Linux Mandrake 8.0.0
- MandrakeSoft Linux Mandrake 8.0.0 ppc
- MandrakeSoft Linux Mandrake 8.1.0
- MandrakeSoft Single Network Firewall 7.2.0
- OpenBSD OpenBSD 2.8.0
- OpenBSD OpenBSD 2.9.0
- OpenBSD OpenBSD 3.0
- S.u.S.E. Linux 6.4.0
- S.u.S.E. Linux 6.4.0 alpha
- S.u.S.E. Linux 6.4.0 i386
- S.u.S.E. Linux 6.4.0 ppc
- S.u.S.E. Linux 7.0.0
- S.u.S.E. Linux 7.0.0 alpha
- S.u.S.E. Linux 7.0.0 i386
- S.u.S.E. Linux 7.0.0 ppc
- S.u.S.E. Linux 7.0.0 sparc
- S.u.S.E. Linux 7.1.0
- S.u.S.E. Linux 7.1.0 alpha
- S.u.S.E. Linux 7.1.0 ppc
- S.u.S.E. Linux 7.1.0 sparc
- S.u.S.E. Linux 7.1.0 x86
- S.u.S.E. Linux 7.2.0
- S.u.S.E. Linux 7.2.0 i386
- S.u.S.E. Linux 7.3.0
- S.u.S.E. Linux 7.3.0 i386
- S.u.S.E. Linux 7.3.0 ppc
- S.u.S.E. Linux 7.3.0 sparc
- SGI IRIX 6.5.0
- SGI IRIX 6.5.1
- SGI IRIX 6.5.10
- SGI IRIX 6.5.11
- SGI IRIX 6.5.12
- SGI IRIX 6.5.12 f
- SGI IRIX 6.5.12 m
- SGI IRIX 6.5.13
- SGI IRIX 6.5.13 f
- SGI IRIX 6.5.13 m
- SGI IRIX 6.5.14
- SGI IRIX 6.5.14 f
- SGI IRIX 6.5.14 m
- SGI IRIX 6.5.15
- SGI IRIX 6.5.16
- SGI IRIX 6.5.17
- SGI IRIX 6.5.18
- SGI IRIX 6.5.2
- SGI IRIX 6.5.3
- SGI IRIX 6.5.4
- SGI IRIX 6.5.5
- SGI IRIX 6.5.6
- SGI IRIX 6.5.7
- SGI IRIX 6.5.8
- SGI IRIX 6.5.9
- Slackware Linux 8.0.0
- Sun Cobalt Control Station 4100CS
- Sun Cobalt RaQ 550
- Sun Solaris 9
- Sun Solaris 9_x86
- Sun Solaris 9_x86 Update 2
- Sun SunOS 5.9.0
- Sun SunOS 5.9.0 _x86
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