Blaze (he/him) to [email protected] • 1 year ago'Critical' vulnerability in OpenSSH uncovered, affects almost all Linux systemswww.computing.co.ukexternal-linkmessage-square39fedilinkarrow-up1243cross-posted to: [email protected]
arrow-up1243external-link'Critical' vulnerability in OpenSSH uncovered, affects almost all Linux systemswww.computing.co.ukBlaze (he/him) to [email protected] • 1 year agomessage-square39fedilinkcross-posted to: [email protected]
minus-square@[email protected]linkfedilink28•1 year agothe in depth technical details TL;DR; sigalarm handler calls syslog which isn’t safe to call from a signal handler context. Their example exploit needed about 10k attempts to get a remote shell so it’s not fast or quiet, but a neat find regardless
minus-square@[email protected]linkfedilink5•1 year agoI can already imagine the log generated will be a hint. We usually automate those anyway as it is closer to (D)DoS too.
the in depth technical details
TL;DR; sigalarm handler calls syslog which isn’t safe to call from a signal handler context.
Their example exploit needed about 10k attempts to get a remote shell so it’s not fast or quiet, but a neat find regardless
I can already imagine the log generated will be a hint. We usually automate those anyway as it is closer to (D)DoS too.