|
 |
|
Opera Long Filename Extension Buffer Overflows
|
|
|
|
|
Secunia Advisory:
|
SA8691
|
|
|
Release Date:
|
2003-04-29
|
|
Last Update:
|
2003-05-12
|
|
|
Critical:
|
Moderately critical
|
|
Impact:
|
DoS
|
|
Where:
|
From remote
|
|
Solution Status:
|
Vendor Patch
|
|
| Software: | Opera 6.x
Opera 7.x
|
|
|
Want to know the next time vulnerabilities are fixed in this product?
- Companies can be alerted via email and SMS! |
|
|
Description:
Two vulnerabilities have been discovered in the Opera browser, which can be exploited by a malicious person to cause a DoS (Denial of Service) on a user's browser.
Both vulnerabilities are caused due to boundary errors in the handling of filename extensions and can be exploited by a malicious person by constructing a special HTML document, which will make the browser try to download a file with a long filename extension.
The first vulnerability will automatically cause a heap overflow overwriting arbitrary content with the user input converted to 16-bit wide chars.
The second vulnerability will display a download dialog box. If the user agrees to save the file, a stack overflow will be triggered overwriting certain registers (EBP and EIP) with the user input converted to 16-bit wide chars.
It may be possible to exploit the vulnerabilities to compromise a user's system. However, this has not been proven during research.
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, using the Network Software Inspector.
Solution:
Opera Software has released Opera version 7.11 for Windows, which fixes the vulnerabilities. Opera version 7.11 beta 2 for Linux will also be officially released soon.
http://www.opera.com/download/
Provided and/or discovered by:
1) Discovered by Jakob Balle, Secunia.
2) The vulnerability was discovered by two different parties around the same time. While Jakob Balle from Secunia was working with the vendor to fix the vulnerability, it was discovered and disclosed on public mailing lists by nesumin before Opera Software had a chance to react.
Changelog:
2003/05/12: Opera Software releases updated versions.
Original Advisory:
http://secunia.com/secunia_research/2003-4/
Other References:
Opera changelog:
http://www.opera.com/windows/changelogs/711/
|
|
|
|
|
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.
|
|
|
|
49 Related Secunia Security Advisories, displaying 10
|
|
|
1. Opera for Windows Unspecified Code Execution
|
|
2. Opera Canvas Functions Information Disclosure
|
|
3. Opera Multiple Vulnerabilities
|
|
4. Opera Multiple Vulnerabilities
|
|
5. Opera Multiple Vulnerabilities
|
|
6. Opera Multiple Vulnerabilities
|
|
7. Opera Multiple Vulnerabilities
|
|
8. Opera Macromedia Flash Player SWF Arbitrary Code Execution
|
|
9. Opera Command Line URL Shell Command Injection
|
|
10. Opera Dialog Origin Spoofing 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
|
|
|
|
|
 |
|
|
Most Popular Advisories
|
|
|
|
|
|
