VDB
CVE-2021-20237
CVE-2021-20237
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 1.69% · 76.3th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
1.69%
76.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:Pro:18.04:LTS | zeromq3 | 4.2.2-1ubuntu2, 0, 4.2.1-4ubuntu1 |
| Ubuntu:Pro:20.04:LTS | zeromq3 | 4.3.2-1, 4.3.2-2, 4.3.2-2ubuntu1 |
Timeline
- May 28, 2021 CVE Published
- May 29, 2021 EPSS Score
- Aug 1, 2021 EPSS Score
- Dec 2, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 1, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jun 5, 2022 EPSS Score
- Aug 6, 2022 EPSS Score
- Oct 7, 2022 EPSS Score
- Dec 7, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20237 third-party-advisory
- https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw third-party-advisory
- https://ubuntu.com/security/notices/USN-4920-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20237 third-party-advisory