GLSA 200606-01: Opera: Buffer overflow

http://security.gentoo.org/

Severity:	normal
Title:	Opera: Buffer overflow
Date:	06/07/2006
Bugs:	#129800
ID:	200606-01

Synopsis

Opera contains an integer signedness error resulting in a buffer overflow which may allow a remote attacker to execute arbitrary code.

Background

Opera is a multi-platform web browser.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
www-client/opera	< 8.54	>= 8.54	All supported architectures

Description

SEC Consult has discovered a buffer overflow in the code processing style sheet attributes. It is caused by an integer signedness error in a length check followed by a call to a string function. It seems to be hard to exploit this buffer overflow to execute arbitrary code because of the very large amount memory that has to be copied.

Impact

A remote attacker can entice a user to visit a web page containing a specially crafted style sheet attribute that will crash the user's browser and maybe lead to the execution of arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All Opera users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-client/opera-8.54"

References

CVE-2006-1834

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200606-01.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.