Poisoned Python and PHP packages purloin passwords for AWS access – Naked Security

A keen-eyed researcher at SANS recently wrote about a new and rather specific sort of supply chain attack against open-source software modules in Python and PHP.

Following on-line discussions about a suspicious public Python module, Yee Ching Tok noted that a package called ctx in the popular PyPi repository had suddenly received an “update”, despite not otherwise being touched since late 2014.

In theory, of course, there’s nothing wrong with old packages suddenly coming back to life.

Sometimes, developers return to old projects when a lull in their regular schedule (or a guilt-provoking email from a long-standing user) finally gives them the impetus to apply some long-overdue bug fixes.

In other cases, new maintainers step up in good faith to revive “abandonware” projects.

But packages can become victims of secretive takeovers, where the password to the relevant account is hacked, stolen, reset or otherwise compromised, so that the package becomes a beachhead for a new wave of supply chain attacks.

Simply put, some package “revivals” are conducted entirely in bad faith, to give cybercriminals a vehicle for pushing out malware under the guise of “security updates” or “feature improvements”.

The attackers aren’t necessarily targeting any specific users of the package they compromise – often, they’re simply watching and waiting to see if anyone falls for their package bait-and-switch.

Which at which point they have a way to target the users or companies that do.

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