(Immunix Issues Fix) Apache mod_rewrite Contains a Buffer Overflow
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SecurityTracker Alert ID: 1008043 |
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SecurityTracker URL: http://securitytracker.com/id/1008043
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CVE Reference:
CAN-2003-0542
(Links to External Site)
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Date: Oct 30 2003
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Impact:
Denial of service via network, Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 2.0.47 and prior versions
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Description:
A vulnerability was reported in the Apache mod_rewrite component. A remote user may be able to trigger a buffer overflow.
It is reported that both mod_alias and mod_rewrite contain a buffer overflow. If the administrator has configured a regular expression with more than 9 captures, the overflow can be triggered.
[Editor's note: The Apache notice did not indicate the impact of the buffer overflow.]
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Impact:
[Editor's note: The Apache notice did not indicate the impact of the buffer overflow.]
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Solution:
Immunix has released a fix.
Precompiled binary packages for Immunix 7+ are available at:
http://download.immunix.org/ImmunixOS/7+/Updates/RPMS/apache-1.3.27-1.7.1_imnx_2.i386.rpm
http://download.immunix.org/ImmunixOS/7+/Updates/RPMS/apache-devel-1.3.27-1.7.1_imnx_2.i386.rpm
http://download.immunix.org/ImmunixOS/7+/Updates/RPMS/apache-manual-1.3.27-1.7.1_imnx_2.i386.rpm
A source package for Immunix 7+ is available at:
http://download.immunix.org/ImmunixOS/7+/Updates/SRPMS/apache-1.3.27-1.7.1_imnx_2.src.rpm
Immunix OS 7+ md5sums:
d0f0fa84c2cb84d23f6110faf86e99c9 RPMS/apache-1.3.27-1.7.1_imnx_2.i386.rpm
52e95aaa3c6acf2f464a0342ba63c360 RPMS/apache-devel-1.3.27-1.7.1_imnx_2.i386.rpm
3d09e9758813e3b96550ffeba8013c47 RPMS/apache-manual-1.3.27-1.7.1_imnx_2.i386.rpm
0cd20af663c6f22ee6127ea241269ef5 SRPMS/apache-1.3.27-1.7.1_imnx_2.src.rpm
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Vendor URL: httpd.apache.org/ (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
Linux (Immunix)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 29 Oct 2003 14:14:14 -0800
Subject: [Immunix-announce] Immunix Secured OS 7+ apache update
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-----------------------------------------------------------------------
Immunix Secured OS Security Advisory
Packages updated: apache
Affected products: Immunix OS 7+
Bugs fixed: CAN-2003-0542
Date: Tue Oct 28 2003
Advisory ID: IMNX-2003-7+-025-01
Author: Seth Arnold <sarnold@immunix.com>
-----------------------------------------------------------------------
Description:
Andr=E9 Malo discovered two stack-based overflows in the Apache web
server; one in mod_alias, the other in mod_rewrite. Quoting from the
OpenPKG adivsory: "These occurred if a regular expression with more
than 9 capturing parenthesis was configured. To exploit this, an
attacker would need to be able to locally create a carefully crafted
configuration file (.htaccess or httpd.conf)."
The Common Vulnerabilities and Exposures (CVE) project assigned the id
CAN-2003-0542 to the problem.
The vulnerability is in an apache wrapper function around the regex(3)
interface; the affected uses of ap_regexec() are called with string
inputs, so it would be difficult to construct the StackGuard canary
value 0x000aff0d when attempting to overwrite the stack-stored
regmatch_t structure arrays; thus, we expect StackGuard should prevent
exploitation of this vulnerability. However, an exhaustive analysis
has not been performed.
In the event StackGuard prevents exploitation of this vulnerability,
the apache process handling the request would still be killed; thus,
Immunix recommends all users upgrade when convenient.
References: http://www.securityfocus.com/archive/1/342674
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2003-0542
http://marc.theaimsgroup.com/?l=3Dapache-cvs&m=3D106701190026083
Package names and locations:
Precompiled binary packages for Immunix 7+ are available at:
http://download.immunix.org/ImmunixOS/7+/Updates/RPMS/apache-1.3.27-1.7.1=
_imnx_2.i386.rpm
http://download.immunix.org/ImmunixOS/7+/Updates/RPMS/apache-devel-1.3.27=
-1.7.1_imnx_2.i386.rpm
http://download.immunix.org/ImmunixOS/7+/Updates/RPMS/apache-manual-1.3.2=
7-1.7.1_imnx_2.i386.rpm
A source package for Immunix 7+ is available at:
http://download.immunix.org/ImmunixOS/7+/Updates/SRPMS/apache-1.3.27-1.7.=
1_imnx_2.src.rpm
Immunix OS 7+ md5sums:
d0f0fa84c2cb84d23f6110faf86e99c9 RPMS/apache-1.3.27-1.7.1_imnx_2.i386.rpm
52e95aaa3c6acf2f464a0342ba63c360 RPMS/apache-devel-1.3.27-1.7.1_imnx_2.i=
386.rpm
3d09e9758813e3b96550ffeba8013c47 RPMS/apache-manual-1.3.27-1.7.1_imnx_2.=
i386.rpm
0cd20af663c6f22ee6127ea241269ef5 SRPMS/apache-1.3.27-1.7.1_imnx_2.src.rpm
GPG verification: =
=20
Our public keys are available at http://download.immunix.org/GPG_KEY
Immunix, Inc., has changed policy with GPG keys. We maintain several
keys now: C53B2B53 for Immunix 7+ package signing, D3BA6C17 for
Immunix 7.3 package signing, and 1B7456DA for general security issues.
NOTE:
Ibiblio is graciously mirroring our updates, so if the links above are
slow, please try:
ftp://ftp.ibiblio.org/pub/Linux/distributions/immunix/
or one of the many mirrors available at:
http://www.ibiblio.org/pub/Linux/MIRRORS.html
ImmunixOS 6.2 is no longer officially supported.
ImmunixOS 7.0 is no longer officially supported.
Contact information:
To report vulnerabilities, please contact security@immunix.com.
Immunix attempts to conform to the RFP vulnerability disclosure protocol
http://www.wiretrip.net/rfp/policy.html.
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_______________________________________________
Immunix-announce mailing list
Immunix-announce@wirex.com
http://mail.wirex.com/mailman/listinfo/immunix-announce
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