VDB
CVE-2021-20235
CVE-2021-20235
PUBLISHED
There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality.
EPSS 6.58% · 91.3th percentile
Risk Scores
EPSS Score
6.58%
91.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:Pro:18.04:LTS | zeromq3 | 4.2.1-4ubuntu1, 4.2.2-1ubuntu2, 4.2.3-1 |
| Ubuntu:Pro:20.04:LTS | zeromq3 | 4.3.2-1, 4.3.2-2, 4.3.2-2ubuntu1 |
Exploit Intelligence
Timeline
- Apr 1, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
- Mar 11, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20235 third-party-advisory
- https://github.com/zeromq/libzmq/security/advisories/GHSA-fc3w-qxf5-7hp6 third-party-advisory
- https://ubuntu.com/security/notices/USN-4920-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20235 third-party-advisory