Ubuntu.comUB:CVE-2018-21035CVE-2018-21035
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
5 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.001 Low
EPSS
Percentile
44.9%
In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for
frames and 2GB for messages. Smaller limits cannot be configured. This
makes it easier for attackers to cause a denial of service (memory
consumption).
Bugs
- <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=953049>
- <https://bugreports.qt.io/browse/QTBUG-70693>
Notes
| Author | Note |
|---|---|
| mdeslaur | upstream commit just adds new settings allowing users to lower allowed frame/message size, it doesn’t change the default behaviour |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | qtwebsockets-opensource-src | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | qtwebsockets-opensource-src | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | qtwebsockets-opensource-src | < any | UNKNOWN |
Related
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
5 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.001 Low
EPSS
Percentile
44.9%