TLP Rating: Clear 
CERT Vanuatu (CERTVU) and the Office of the Chief Information Officer (OGCIO) provides the following advisory.
On June 07th, 2023, CERT Vanuatu received an advisory from its collaborating partner, Cybersecurity Infrastructure Security Agency (CISA), that Mozilla Products have been identified to be vulnerable, and Mozilla has released security updates to address these vulnerabilities.
What is it?
Mozilla has released security Updates to address vulnerabilities for Firefox 114 and Firefox ESR 102.12, The vulnerabilities could be exploited by an attacker that could take control of an affected system.
Technical Details of each CVEs - Security Vulnerability for Firefox 114 and Firefox ESR 102.12
Announced 6th of June 2023
Impact high
Products Firefox
Fixed in Firefox 114
CVE-2023-34414: Click -jacking certificate exceptions through rendering lag
Impact high
Description
CVE-2023-34414
The error page for sites with invalid TLS certificates was missing the activation-delay Firefox uses to protect prompts and permission dialogs from attacks that exploit human response time delays. If a malicious page elicited user clicks in precise locations immediately before navigating to a site with a certificate error and simultaneously made the renderer extremely busy, it could create a gap between when the error page was loaded and when the display refreshed. With the right timing, the elicited clicks could land in a gap and activate the button that overrides the certificate error for that site.
CVE-2023-34415: Site-isolation bypass on site that allow open redirects to data: urls
Impact moderate
Description
When choosing a site-isolated process for a document loaded from a data: URL that was the result of a redirect, Firefox would load that document in the same process as the site that issued the redirect. This bypassed the site-isolation protections against Spectre-like attacks on sites that host an “open redirect”. Firefox no longer follows HTTP redirects to data: URLs
CVE-2023-34416: Memory safety bugs fixed in Firefox 114 and Firefox ESR102.12
Impact high
Description CVE-2023-34416
Mozilla developers reported memory safety bugs present in Firefox 113 and Firefox ESR 102.12. Some of these bugs showed evidence of memory corruption, and it is presumed that with enough effort, some of this could have been exploited to run arbitrary code Mitigation Proc
Mitigation Process / How do I Stay Safe?
Install latest updates from Microsoft Exchange Server for 2013, 2016 and 2016. If your Exchange is compromised, go to Microsoft site (below) for mitigation and detection advise. Window’s Site:
Additional information can be found in Microsoft blog:
References
- https://www.cisa.gov/news-events/alerts/2023/06/07/mozilla-releases-security-updates-multiple-products
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-19/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-20/
- Download advisory (English): : CVE-2022-34414 Security Vulnerabilities fixed for Firefox 114_Firefox_ESR 10212
- Download advisory (French): Avis 24 Multiples vulnérabilités découvertes dans les produits Mozilla – Firefox 114 et Firefox ESR 102.12
- Download advisory (Bislama): Vulnerabiliti long ol Prodak blong Mozilla – Firefox 114 mo Firefox ESR 102.12