Buffer Overflow Vulnerability in ZeroMQ Server Affects Multiple Versions by Affects
CVE-2021-20236

9.8CRITICAL

Key Information:

Vendor

ZeroMQ

Status
ZeroMQ
Vendor
CVE Published:
28 May 2021

What is CVE-2021-20236?

A critical flaw exists in the ZeroMQ server prior to version 4.3.3, allowing a malicious client to exploit stack buffer overflow vulnerabilities. By sending specially crafted topic subscription requests and subsequently unsubscribing, the attacker can compromise server stability. This vulnerability endangers the confidentiality and integrity of system data while potentially disrupting service availability. Immediate attention is advised to mitigate associated risks.

Affected Version(s)

zeromq zeromq 4.3.3

References

https://bugzilla.redhat.com/show_bug.cgi?id=1921976
x_refsource_MISC
https://github.com/zeromq/libzmq/security/advisories/GHSA...
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.