GLSA 200311-02: Opera: buffer overflows in 7.11 and 7.20

http://security.gentoo.org/

Severity:	high
Title:	Opera: buffer overflows in 7.11 and 7.20
Date:	11/19/2003
Bugs:	#31775
ID:	200311-02

Synopsis

Buffer overflows exist in Opera 7.11 and 7.20 that can cause Opera to crash, and can potentially overwrite arbitrary bytes on the heap leading to a system compromise.

Background

Opera is a multi-platform web browser.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
www-client/opera	== 7.20	>= 7.21	All supported architectures

Description

The Opera browser can cause a buffer allocated on the heap to overflow under certain HREFs when rendering HTML. The mail system is also deemed vulnerable and an attacker can send an email containing a malformed HREF, or plant the malicious HREF on a web site.

Impact

Certain HREFs can cause a buffer allocated on the heap to overflow when rendering HTML which can allow arbitrary bytes on the heap to be overwritten which can result in a system compromise.

Workaround

There is no known workaround at this time.

Resolution

Users are encouraged to perform an 'emerge sync' and upgrade the package to the latest available version. Opera 7.22 is recommended as Opera 7.21 is vulnerable to other security flaws. Specific steps to upgrade:

    # emerge sync
    # emerge -pv '>=www-client/opera-7.22'
    # emerge '>=www-client/opera-7.22'
    # emerge clean

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200311-02.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.