Resource management error in zeromq - CVE-2020-15166

Vulnerability identifier: #VU46682

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2020-15166

CWE-ID: CWE-399

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

zeromq
Arch Linux
Gentoo Linux
Debian Linux
Fedora
openEuler
zeromq (Alpine package)
zeromq3 (Debian package)
zeromq
cppzmq-devel
zeromq-debuginfo
zeromq-debugsource
zeromq-devel
zeromq-help

Install updates from vendor's website.

zeromq - update to 4.3.3
zeromq3 (Debian package) - update to 4.3.1-4+deb10u2
zeromq - addressed in versions 4.3.3-1.el8, 4.3.3-1.fc32, 4.3.3-1.fc33
zeromq - update to 4.3.4-1
cppzmq-devel - update to 4.3.4-1
zeromq-debuginfo - update to 4.3.4-1
zeromq-debugsource - update to 4.3.4-1
zeromq-devel - update to 4.3.4-1
zeromq-help - update to 4.3.4-1

• 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

• Denial of service in ZeroMQ
• Gentoo update for ZeroMQ
• Resource management error in zeromq (Alpine package)
• Arch Linux update for zeromq
• Arch Linux update for lib32-zeromq
• Debian update for zeromq3
• openEuler 20.03 LTS SP4 update for zeromq
• Fedora 33 update for zeromq
• Fedora 32 update for zeromq
• Fedora EPEL 8 update for zeromq