Resource management error in zeromq - CVE-2020-15166

Vulnerability identifier: #VU46682

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2020-15166

CWE-ID: CWE-399

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: ZeroMQ Project

Affected software:
zeromq

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources with the application when processing TCP requests. If a raw TCP socket is opened and connected to an endpoint that is fully configured with CURVE/ZAP, legitimate clients will not be able to exchange any message. Handshakes complete successfully, and messages are delivered to the library, but the server application never receives them.

Install updates from vendor's website.

• https://github.com/zeromq/libzmq/pull/3913
• https://github.com/zeromq/libzmq/pull/3973
• https://github.com/zeromq/libzmq/security/advisories/GHSA-25wp-cf8g-938m
• https://security.gentoo.org/glsa/202009-12