# NetHack 3.6.6

NetHack Versions

Jay Fenlason's Hack
HACK for UNIX
Hack 1.21 for DOS
Hack for PDP-11
PC/IX Hack

Andries Brouwer's Hack
Hack 1.0
Hack 1.0.1
Hack 1.0.2
Hack 1.0.3

Early NetHack
NetHack 1.3d
NetHack 1.4f
NetHack 2.2a
NetHack 2.3e

The NetHack 3.0 Series
NetHack 3.0.0
NetHack 3.0.1
NetHack 3.0.2
NetHack 3.0.3
NetHack 3.0.4
NetHack 3.0.5
NetHack 3.0.6
NetHack 3.0.7
NetHack 3.0.8
NetHack 3.0.9
NetHack 3.0.10

The NetHack 3.1 Series
NetHack 3.1.0
NetHack 3.1.1
NetHack 3.1.2
NetHack 3.1.3

The NetHack 3.2 Series
NetHack 3.2.0
NetHack 3.2.1
NetHack 3.2.2
NetHack 3.2.3

The NetHack 3.3 Series
NetHack 3.3.0
NetHack 3.3.1

The NetHack 3.4 Series
NetHack 3.4.0
NetHack 3.4.1
NetHack 3.4.2
NetHack 3.4.3

The NetHack 3.6 Series
NetHack 3.6.0
NetHack 3.6.1
NetHack 3.6.2
NetHack 3.6.3
NetHack 3.6.4
NetHack 3.6.5
NetHack 3.6.6
NetHack 3.6.7

NetHack 3.6.6 is the 36th public release of NetHack. It was released on March 8th, 2020. This release fixes a security vulnerability that existed in versions 3.6.1, 3.6.2, 3.6.3, 3.6.4 and 3.6.5, as well as some more minor bugs. There were no new gameplay features.[1]

Availability
NetHack 3.6.6 is available from the official NetHack website.

Significant changes
This release fixes CVE-2020-5254.[2] As with the security bugs fixed in 3.6.4 and 3.6.5, this bug was reported to the DevTeam by security researcher David Mendenhall, who also explained that the bug can be used to glitch the game.[3]
There were some other fixes[4]:

Formatting corpse names used internal buffers differently from formatting other objects and could potentially clobber memory
Avoid divide by 0 crash if 'bogusmon' (file of bogus monster types) is empty
Avoid #wizrumorcheck crash if either 'rumors.tru' or 'rumors.fal' or both were empty when makedefs built 'rumors'
Avoid "'s glorkum pass harmlessly through the shade" for weaponless monsters
References

↑ https://github.com/NetHack/NetHack/blob/NetHack-3.6/doc/fixes36.6

↑ https://nethack.org/security/CVE-2020-5254.html

↑ https://dpmendenhall.blogspot.com/2020/03/nethack-366-or-how-to-glitch-nethack.html

↑ https://nethack.org/v366/release.html