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Opera Long Filename Extension Buffer Overflows
Secunia Advisory: SA8691
Release Date: 2003-04-29
Last Update: 2003-05-12
Popularity: 15,887 views

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

Software:Opera 6.x
Opera 7.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

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.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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