PT-2021-3605 · Zeromq+4 · Zeromq+4

Pedro Sampaio · CVE-2021-20234 · Published 2021-03-09 · Updated 2024-07-29

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions ZeroMQ versions prior to 4.3.3

Description An uncontrolled resource consumption issue, specifically a memory leak flaw, was found in the ZeroMQ client. This issue can cause a client to crash if it connects to multiple malicious or compromised servers, with the highest threat being to system availability. The flaw is located in src/pipe.cpp.

Recommendations For versions prior to 4.3.3, update to version 4.3.3 or later to resolve the issue. As a temporary workaround, consider restricting connections to trusted servers to minimize the risk of exploitation.

Exploit

Fix

Resource Exhaustion

Memory Leak

Weakness Enumeration

CWE-400

CWE-401

Related Identifiers

ALT-PU-2022-1314

BDU:2021-03710

CVE-2021-20234

DLA-2588-1

GHSA-WFR2-29GJ-5W87

USN-4920-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Ubuntu

Zeromq

References · 28

• 🔥 https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-20234 · Security Note
• https://osv.dev/vulnerability/USN-4920-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20235 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20210611SE16 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20237 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20211019SE81 · Vendor Advisory
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=47416144 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-20234 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4920-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-20234 · Security Note
• https://osv.dev/vulnerability/DLA-2588-1 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1921972 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-20234 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2024-0830SE17 · Vendor Advisory