CVE-2021-20236 — Classic Buffer Overflow in Zeromq
Severity
9.8CRITICALNVD
EPSS
0.3%
top 45.26%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMay 28
Latest updateMay 24
Description
A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9
Affected Packages3 packages
Also affects: Fedora 33, Enterprise Linux 7.0
Patches
🔴Vulnerability Details
3📋Vendor Advisories
3Microsoft▶
A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and th↗2021-05-11
Debian▶
CVE-2021-20236: zeromq3 - A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows...↗2021