Security News
Microsoft has released security updates to address two high-severity Microsoft Exchange zero-day vulnerabilities collectively known as ProxyNotShell and exploited in the wild. Microsoft confirmed they were actively abused in attacks on September 30, saying it was "Aware of limited targeted attacks using the two vulnerabilities to get into users' systems."
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Outlook uses MAPI over HTTP as the default connection to Exchange, which gives users a more stable and reliable connection; although, you need to enable that in Exchange 2013 before setting up Exchange 2019. It might seem strange to update Exchange 2013 just so you can set up Exchange 2019, but you'll need to be on one of the two most recent cumulative updates for Exchange 2013 to be in support and for it to coexist with Exchange 2019 while you work through the upgrade.
Two weeks ago we reported on two zero-days in Microsoft Exchange that had been reported to Microsoft three weeks before that by a Vietnamese company that claimed to have stumbled across the bugs on an incident response engagement on a customer's network. One day ago [2022-10-11] was the latest Patch Tuesday.
Microsoft's Patch Tuesday update for the month of October has addressed a total of 85 security vulnerabilities, including fixes for an actively exploited zero-day flaw in the wild. Of the 85 bugs,...
Feds also said the biz sucked at policing transactions for suspicious activity – as if! Bittrex will cough up $53 million after being accused of flouting US sanctions and breaking federal money...
Let's start off with what Redmond didn't fix: two Exchange Server bugs dubbed ProxyNotShell that have been exploited by snoops as far back as August. A month later, Zero Day Initiative purchased the bugs and disclosed them to Microsoft.
Lockbit ransomware affiliates are encrypting victims via Microsoft Exchange servers hacked using exploits targeting unpatched vulnerabilities. In at least one such incident from July 2022, the attackers used a previously deployed web shell on a compromised Exchange server to escalate privileges to Active Directory admin, steal roughly 1.3 TB of data, and encrypt network systems.
Microsoft on Friday disclosed it has made more improvements to the mitigation method offered as a means to prevent exploitation attempts against the newly disclosed unpatched security flaws in Exchange Server. To that end, the tech giant has revised the blocking rule in IIS Manager from ".
Microsoft has updated the mitigations for the latest Exchange zero-day vulnerabilities tracked as CVE-2022-41040 and CVE-2022-41082, also referred to ProxyNotShell.Reported privately to Microsoft three weeks ago, CVE-2022-41040 is a server-side request forgery that enables privilege escalation and works with CVE-2022-41082 to trigger remote code execution on on-premise Exchange server deployments.