Secunia - Stay Secure
Gartner
Home Corporate Website Jobs Updated Mailing Lists RSS Blog  Online Shop Advertise
Software Inspectors
  Scan Online
  Personal (PSI)
  Network (NSI 2.0)

Solutions For
  Security Professionals
  Security Vendors

Free Solutions For
  Open Communities
  Journalists & Media

Secunia Advisories
  Search
  Historic Advisories
  Listed By Product
  Listed By Vendor
  Statistics / Graphs
  Secunia Research
  Report Vulnerability
  About Advisories

Virus Information
  Chronological List
  Last 10 Virus Alerts
  About Virus Information

Secunia Customers
  Customer Area


Apache mod_ssl "ssl_util_uuencode_binary()" Buffer Overflow Vulnerability Advisory Available in Danish 

Secunia Advisory: SA11534  
Release Date: 2004-05-28

Critical:
Moderately critical
Impact: DoS
System access
Where: From remote
Solution Status: Vendor Patch

Software:Apache 1.3.x
Apache 2.0.x
mod_ssl 2.x

CVE reference:CVE-2004-0488 (Secunia mirror)

Want to know the next time vulnerabilities are fixed in this product?
- Companies can be alerted via email and SMS!


Description:
Georgi Guninski has discovered a vulnerability in mod_ssl, which potentially can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the "ssl_util_uuencode_binary()" function when handling client certificates. This can potentially be exploited to cause a stack-based buffer overflow by sending a specially crafted client certificate containing an overly long subject DN (more than 6KB).

Successful exploitation requires that the "FakeBasicAuth" option is enabled and that the malicious client certificate is issued from a trusted CA (Certificate Authority).

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.

Solution:
Update to version 2.8.18 for Apache 1.3.31:
http://www.modssl.org/source/mod_ssl-2.8.18-1.3.31.tar.gz

A fix for the Apache 2.0 branch is available via CVS:
http://cvs.apache.org/viewcvs.cgi/htt...engine_kernel.c?r1=1.105&r2=1.106

Provided and/or discovered by:
Georgi Guninski



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

47 Related Secunia Security Advisories, displaying 10

1. Apache mod_proxy Interim Responses Denial of Service
2. Apache mod_imap and mod_status Cross-Site Scripting Vulnerabilities
3. Apache mod_imap and mod_status Cross-Site Scripting Vulnerabilities
4. Apache HTTP Method Request Entity Too Large Cross-Site Scripting
5. Apache mod_proxy "date" Denial of Service Vulnerability
6. Apache Denial of Service and Cross-Site Scripting
7. Apache "mod_alias" URL Validation Canonicalization Vulnerability
8. Apache mod_rewrite Off-By-One Buffer Overflow Vulnerability
9. Apache "Expect" Header Cross-Site Scripting Vulnerability
10. Apache 2 mod_ssl Denial of Service Vulnerability

Show all related advisories


Send Feedback to Secunia

If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.

Ideas, suggestions, and other feedback are most welcome.








Secunia PSI
Scan | Patch | Track
Free Download

Secunia Poll

Do you think it's important to read Setup/User Guides for applications for use within your network?


See Results   


Most Popular Advisories

1.
BlackBerry Enterprise Server PDF Processing Vulnerability
2.
Sun Solaris System Management Agent SNMP Daemon Buffer Overflow
3.
Vim configure.in Insecure Temporary Files
4.
IBM WebSphere Application Server Unspecified Vulnerability
5.
tplSoccerSite Multiple SQL Injection Vulnerabilities
6.
MRO Maximo Information Disclosure and Cross-Site Scripting
7.
phpHoo3 "viewCat" SQL Injection Vulnerability
8.
Fedora update for firefox
9.
AlstraSoft Video Share Enterprise "UID" SQL Injection
10.
LunarNight Laboratory WebProxy Cross-Site Scripting





Vulnerability Management - Terms & Conditions - Copyright 2002-2008 Secunia - Compliance - Contact Secunia