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Slideshow: How Firesheep Can Hijack Web Sessions

That recommendation comes from the Australian National Audit Office (ANAO), which recently audited four Australian government agencies to assess the effectiveness of their information security framework, network security management, access management, and equipment security.

The audit examined four groups inside the Australian government: the Office of Financial Management, ComSuper (which handles government pensions), Medicare Australia, and the Department of the Prime Minister and Cabinet. They served as a representative cross-sample of agencies and their approach to IT, or ICT (information and communication technologies), as it is often known abroad.

Interestingly, auditors found that government employees were actively using Webmail accounts such as Gmail and Hotmail. According to the ANAO's report, "Webmail accounts were accessible in one of the audited agencies, and logs showed that some staff were using these accounts on a regular basis."

That finding lead the ANAO to recommend that "emails using public Web-based email services should be blocked on agency ICT systems, as these can provide an easily accessible point of entry for an external attack and subject the agency to the potential for intended or unintended information disclosure."

The move would appear designed to help stem Wikleaks-type scandals. But auditors also cited more mundane -- and likely prevalent -- concerns, such as stopping financial cybercrime, as well as simply maintaining service levels. "Vulnerabilities within ICT systems may allow an attacker to gain access to sensitive information, including information about government decision-making, significant financial transactions, and aggregate personal and financial information," according to the report. "Attackers could also potentially cause disruption to agency services, payments, and public information."

From a security and risk standpoint, the audit also identified password practices as a sore point. In fact, auditors were able to compromise roughly 20% of passwords at three different agencies, using brute-force techniques. While this percentage compared favorably with private sector standards, it called on agencies to review their password practices, and especially their administrative password practices, since it successfully cracked multiple administrator passwords as well.

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