Mozilla fixes Firefox zero-day being actively exploited
The US cyber security agency has warned the vulnerability is being used to take control of users’ machines
Mozilla has patched a critical flaw in its Firefox browser that’s being actively exploited by criminals in targeted attacks.
The critical vulnerability, branded CVE-2019-17026, allows an attacker to seize control of an affected computer through a mechanism that leads to ‘type confusion’, according to an advisory released by Mozilla.
The company confirmed that the critical flaw, which has now been patched, affects users running version 72 of Firefox and version 68.4 of Firefox ESR. The developer added that it’s "aware of targeted attacks in the wild abusing this flaw".
The severity of the flaw is such that the US Cyber Security and Infrastructure Agency has issued a separate warning urging Firefox users to apply the necessary updates.
It’s the second time within seven months that Firefox has sustained a critical zero-day vulnerability being actively exploited in the wild.
A previous flaw, discovered in June 2019, gave attackers the tools to execute arbitrary code on flawed machines and in some cases take over users’ devices remotely.
The latest emergency fix follows a round of 11 CVE-rated bug fixes Mozilla has issued, five of which were rated ‘high’ and four rated ‘medium’. Among these highly-rated issues were memory safety bugs in Firefox 72, another type confusion issue, and a memory corruption flaw.
Why UEM is the key to enterprise IT security
A guide to effective endpoint securityDownload now
The second major security scare within a matter of months is a blow to a developer trying to forge a fresh identity for Firefox as a privacy-centric web browser. Mozilla has teased and rolled out a suite of changes to how Firefox functions in the last year, including tools like a virtual private network (VPN).
In September last year, Mozilla also instigated a change in Firefox that would block known third-party tracking cookies and cryptocurrency mining by default as part of its Enhanced Tracking Protection (ETP).
How inkjet can transform your business
Get more out of your business by investing in the right printing technologyDownload now
Journey to a modern workplace with Office 365: which tools and when?
A guide to how Office 365 builds a modern workplaceDownload now
Modernise and transform your sales organisation
Learn how a modernised sales process can drive your businessDownload now
Your guide to managing cloud transformation risk
Realise the benefits. Mitigate the risksDownload now