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Jul 29, 2021
UPDATE: PetitPotam NTLM Relay Attack
THE THREAT PetitPotam is a variant of the NTLM Relay attack discovered by security researcher Gilles Lionel. It is tracked as an authentication bypass vulnerability in Active Directory (Certificate Services); currently no CVE identifier has been assigned to this vulnerability. Proof of Concept (PoC) code released last week [1] relies on the Encrypting File System Remote (EFSRPC) protocol to…
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Sydney, 12 July, 2021 - Tecala, Australia’s award-winning technology services and IT consulting provider, today announced it has chosen eSentire, the global Authority in Managed Detection and Response (MDR) cybersecurity services, as their exclusive MDR solution provider in Australia and New Zealand. This partnership will enable Tecala to augment its cybersecurity practice and offer enterprises…
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Security advisories — Jun 19, 2019

Firefox Zero-Day Vulnerability

1 min read

The Threat

On June 18th, 2019, Mozilla released a critical advisory (CVE-2019-11707) for a 'type confusion' vulnerability that is being actively exploited in the wild [1]. If successful, exploitation enables remote malicious actors to take full control of any vulnerable system(s).

The researcher that discovered this flaw indicates the bug can be exploited for UXSS (Universal Cross-Site Scripting) or RCE (Remote Code Execution) [2]. While both methods are serious, it is worth noting RCE would require additional complexities for successful exploitation (e.g. sandbox escape), while UXSS is a type of attack that could necessitate the execution of malicious code via client-side vulnerabilities.

Mozilla has indicated the following versions are fixed and protected against this critical flaw: 67.0.3 and Firefox ESR 60.7.1 [3]. It is highly recommended to apply the security patches after performing a business impact review, as attacks exploiting CVE-2019-11707 are already occurring.

What we’re doing about it

What you should do about it

Additional information

The vulnerability resides in the Array.pop file which is an array method is used by Firefox in JavaScript objects. There are not currently any workarounds for this issue outside of applying security patches. If not already enabled, it is recommended to turn on auto-updates for Firefox [4].

Attacks in the wild are speculatively believed to be financially motivated and targeting cryptocurrency exchanges.

References:

[1] https://www.mozilla.org/en-US/security/advisories/mfsa2019-18/

[2] https://twitter.com/5aelo/status/1141273396958900224

[3] https://www.securityfocus.com/bid/108810/info

[4] https://www.technipages.com/enable-disable-automatic-updates-in-firefox