5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
58.6%
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.
docs.ssh-mitm.at/puttydos.html
github.com/ssh-mitm/ssh-mitm-plugins/blob/main/ssh_mitm_plugins/ssh/putty_dos.py
launchpad.net/bugs/cve/CVE-2021-33500
nvd.nist.gov/vuln/detail/CVE-2021-33500
security-tracker.debian.org/tracker/CVE-2021-33500
www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
www.cve.org/CVERecord?id=CVE-2021-33500
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
58.6%