CVE-2021-33500

Description

PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.

References

https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html

https://github.com/ssh-mitm/ssh-mitm-plugins/blob/main/ssh_mitm_plugins/ssh/putty_dos.py

https://docs.ssh-mitm.at/puttydos.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS