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ubuntucveUbuntu.comUB:CVE-2020-25708
HistoryNov 13, 2020 - 12:00 a.m.

CVE-2020-25708

2020-11-1300:00:00
ubuntu.com
ubuntu.com
12
divide by zero
libvncserver
denial of service
vnc server
floating point exception

CVSS2

5

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

CVSS3

7.5

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

EPSS

0.002

Percentile

59.1%

A divide by zero issue was found to occur in libvncserver-0.9.12. A
malicious client could use this flaw to send a specially crafted message
that, when processed by the VNC server, would lead to a floating point
exception, resulting in a denial of service.

Notes

Author Note
leosilva vino ships libvncserver source in server/libvncserver

CVSS2

5

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

CVSS3

7.5

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

EPSS

0.002

Percentile

59.1%