CVE-2021-33500

CVE Database · CVE-2021-33500

CVE-2021-33500

· HIGHModified

CVSS v3.1

7.5

EPSS

1.97%

Published

May 21, 2021

Modified

Nov 21, 2024

Public PoC / Exploit (1)

All weaponized →

TrickestTrickest PoC index

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products (2)

putty · putty (up to 0.75)vulnerable

microsoft · windows

References (6)

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

ExploitThird Party Advisory

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

ExploitThird Party Advisory

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

Release NotesThird Party Advisory

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

ExploitThird Party Advisory

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

ExploitThird Party Advisory

KEV Catalog EPSS Scores Vendors All CVEs