MOVEit mayhem 3: “Disable HTTP and HTTPS visitors instantly”

But extra MOVEit mayhem!

“Disable HTTP and HTTPS visitors to MOVEit Switch,” says Progress Software program, and the timeframe for doing so is “instantly”, no ifs, no buts.

Progress Software program is the maker of file-sharing software program MOVEit Switch, and the hosted MOVEit Cloud various that’s based mostly on it, and that is its third warning in three weeks about hackable vulnerabilities in its product.

On the finish of Could 2023, cyberextortion criminals related to the Clop ransomware gang have been discovered to be utilizing a zero-day exploit to interrupt into servers working the MOVEit product’s internet front-end.

By sending intentionally malformed SQL database instructions to a MOVEit Tranfer server through its internet portal, the criminals might entry database tables while not having a password, and implant malware that allowed them to return to compromised servers in a while, even when they’d been patched within the meantime.

The attackers have apparently been stealing trophy firm information, akin to worker payroll particulars, and demanding blackmail funds in reurn for “deleting” the stolen information.

We defined easy methods to patch, and what you could possibly search for in case the crooks had already paid you a go to, again at first of June 2023:

Second warning

That warning was adopted, final week, by an replace from Progress Software program.

Whereas investigating the zero-day gap that they’d simply patched, Progress builders uncovered related programming flaws elsewhere within the code.

The corporate subsequently printed a additional patch, urging prospects to use this new replace proactively, assuming that the crooks (whose zero-day had simply been rendered ineffective by the primary patch) would even be keenly in search of different methods to get again in.

Unsurprisingly, bugs of a feather typically flock collectively, as we defined on this week’s Bare Safety podcast:

[On 2023-06-09, Progress put] one other patch out to take care of related bugs that, so far as they know, the crooks haven’t discovered but (but when they appear laborious sufficient, they could).

And, as bizarre as that sounds, once you discover {that a} explicit a part of your software program has a bug of a specific kind, you shouldn’t be shocked if, once you dig deeper…

…you discover that the programmer (or the programming staff who labored on it on the time that the bug you already learn about obtained launched) dedicated related errors across the similar time.

Third time unfortunate

Properly, lightning has apparently simply struck the identical place for the third time in fast succession.

This time, it appears as if somebody carried out what’s identified within the jargon as a “full disclosure” (the place bugs are revealed to the world concurrently to the seller, thus giving the seller no respiratory room to publish a patch proactively), or “dropping an 0-day”.

Progress has simply reported:

At present [2023-06-15], a third-party publicly posted a brand new [SQL injection] vulnerability. We now have taken HTTPS visitors down for MOVEit Cloud in gentle of the newly printed vulnerability and are asking all MOVEit Switch prospects to right away take down their HTTP and HTTPS visitors to safeguard their environments whereas the patch is finalized. We’re at present testing the patch and we’ll replace prospects shortly.

Merely put, there’s a quick zero-day interval throughout which a working exploit is circulating, however the patch isn’t prepared but.

As Progress has talked about earlier than, this group of so-called command injection bugs (the place you ship in what should be innocent information that later will get invoked as a server command) can solely be triggered through MOVEit’s web-based portal, utilizing HTTP or HTTPS requests.

Luckily, meaning you don’t have to shut down your complete MOVEit system, solely web-based entry.

What to do?

Quoting from Progress Software program’s recommendation doc dated 2023-06-15:

Disable all HTTP and HTTPs visitors to your MOVEit Switch atmosphere. Extra particularly:

  • Modify firewall guidelines to disclaim HTTP and HTTPs visitors to MOVEit Switch on ports 80 and 443.
  • You will need to word that till HTTP and HTTPS visitors is enabled once more:
    • Customers will be unable to go browsing to the MOVEit Switch internet UI.
    • MOVEit Automation duties that use the native MOVEit Switch host is not going to work.
    • REST, Java and .NET APIs is not going to work.
    • MOVEit Switch add-in for Outlook is not going to work.
  • SFTP and FTP/s protocols will proceed to work as regular

Hold your eyes out for the third patch on this saga, at which level we assume that Progress will give the all-clear to show internet entry again on…

…although we’d sympathise for those who determined to maintain it turned of for some time longer, simply to make certain, to make certain.


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