What’s Vulnerable › Vulnerabilities

CVE-2019-13132

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 42.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-10 · updated 2026-06-17
• Weakness: CWE-787

Description

In ZeroMQ libzmq before 4.0.9, 4.1.x before 4.1.7, and 4.2.x before 4.3.2, a remote, unauthenticated client connecting to a libzmq application, running with a socket listening with CURVE encryption/authentication enabled, may cause a stack overflow and overwrite the stack with arbitrary data, due to a buffer overflow in the library. Users running public servers with the above configuration are highly encouraged to upgrade as soon as possible, as there are no known mitigations.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 18.10, 19.04
• Debian Linux: 8.0, 9.0
• Fedoraproject Fedora: 29, 30, 31
• zeromq libzmq: before 4.0.9; from 4.1.0 before 4.1.7; from 4.2.0 before 4.3.2 — fixed in 4.0.9, 4.1.7, 4.3.2

How to fix

Upgrade to a fixed version: zeromq libzmq 4.0.9, 4.1.7, 4.3.2. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00033.html
• http://www.openwall.com/lists/oss-security/2019/07/08/6
• http://www.securityfocus.com/bid/109284
• https://fangpenlin.com/posts/2024/04/07/how-i-discovered-a-9-point-8-critical-security-vulnerability-in-zeromq-with-mostly-pure-luck/
• https://github.com/zeromq/libzmq/issues/3558
• https://github.com/zeromq/libzmq/releases
• https://lists.debian.org/debian-lts-announce/2019/07/msg00007.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AVCTNUEOFFZUNJOXFCYCF3C6Y6NDILI3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MK7SJYDJ7MMRRRPCUN3SCSE7YK6ZSHVS/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T6HINI24SL7CU6XIJWUOSGTZWEFOOL7X/
• https://news.ycombinator.com/item?id=39970716
• https://seclists.org/bugtraq/2019/Jul/13

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