Ubuntu.comUB:CVE-2021-20237CVE-2021-20237
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
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
55.8%
An uncontrolled resource consumption (memory leak) flaw was found in
ZeroMQ’s src/xpub.cpp in versions before 4.3.3. This flaw allows a remote
unauthenticated attacker to send crafted PUB messages that consume
excessive memory if the CURVE/ZAP authentication is disabled on the server,
causing a denial of service. The highest threat from this vulnerability is
to system availability.
Bugs
Notes
| Author | Note |
|---|---|
| sespiros | Upstream patch introduces a regression which is addressed in https://github.com/zeromq/libzmq/pull/3959 (which fixes CVE-2021-20236) |
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
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
55.8%