yama

Here is how to do it; 1) Yama - We are embedded in an environment which influences us.

No, the PoC forks and ptraces the child, which is allowed in even the strictest yama settings.

On Ubuntu, with Yama enabled (the default), programs can't generally ptrace (or read /proc/self/environ) from other programs running as the same user.

The same bash instance is the parent of the process being attacked so it meets the requirements to ptrace at yama/ptrace_scope == 1.

Perhaps the Yama cold brew tower CDM25 is the device you saw.

I've tried plenty of methods, and for me, the easiest way of making 20 ounces is a Yama stove top vacuum pot.

A sibling comment links to Yama glass...

As a user or sysadmin, one way to detect ptrace is to use Yama [1], a Linux kernel module that creates an entry in /proc/sys/kernel/yama/ptrace_scope to configure a user's desired level of ptrace protection, from 0 (normal - any process can call ptrace() on another process owned by the same user) to 3 (completely disabling ptrace).

If any HNers are looking for a cheap entry point into the style without spending $250+ on a beautiful bunch of laboratory glass ware, there's the puckpuck[1], which sits on top of an aeropress and turns it into functionally the same device as the Yama towers - slow controlled valve dripping cold water at a controlled rate onto a bed of coffee and a paper filter over the course of hours.

I think it's worth pointing out that all demonstrations of this issue either needs yama to be disabled for `ptrace` to work (this is what reptyr does under the hood), or you need to be part of the parent process to abuse the tty terminal.

How can you punish an ignorant child with the same severity as a knowing adult?” Yama tried to explain that karma operates impartially, but Mandavya would not accept this.

“Why did I have to suffer such a gruesome fate?” Sage Mandavya asked Lord Yama.

What terrible sin did I commit to deserve impalement?” Yama consulted his records and replied, “When you were a child, you caught a dragonfly and pierced it with a needle through its body, watching it suffer for your amusement.

In his righteous anger, the sage cursed Yama himself: “For this unjust judgment, you shall be born as a human on Earth and experience mortality yourself!” This curse led to Yama being born as Vidura, the wise and virtuous counselor in the Mahabharata - a human who, despite his wisdom and righteousness, had to endure the limitations and sufferings of mortal life.

Even Yama, an LSM, requires root (or de facto equivalent) for initial setup (as it should).

There’s another story about Sage Markandeya (one of the nine immortals, the Chiranjeevis) who caused the death of Yama, the God of Death.

When the sage finally left his mortal body, he went directly to Yamaloka—the realm of Yama, the god of death and justice—to demand an explanation.