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Opera: Buffer overflow


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200606-01 / opera
Release Date June 07, 2006
Latest Revision June 07, 2006: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
www-client/opera < 8.54 >= 8.54 All supported architectures

Related bugreports: #129800


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

2.  Impact Information


Opera is a multi-platform web browser.


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.


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.

3.  Resolution Information


There is no known workaround at this time.


All Opera users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4.  References


Page updated June 07, 2006

Summary: This is a Gentoo Linux Security Advisory

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