High severity7.5NVD Advisory· Published Sep 11, 2020· Updated Jun 17, 2026
CVE-2020-15166
CVE-2020-15166
Description
In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability. Users with TCP transport public endpoints, even with CURVE/ZAP enabled, are impacted. 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. This is patched in version 4.3.3.
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Affected products
22- osv-coords19 versionspkg:rpm/opensuse/libunwind&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/libunwind&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/zeromq&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/zeromq&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/zeromq&distro=openSUSE%20Tumbleweedpkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP1pkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP2pkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/libunwind&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/zeromq&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/zeromq&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/zeromq&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/zeromq&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/zeromq&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/zeromq&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015
< 1.2.1-lp151.4.3.1+ 18 more
- (no CPE)range: < 1.2.1-lp151.4.3.1
- (no CPE)range: < 1.2.1-lp152.5.3.1
- (no CPE)range: < 4.2.3-lp151.5.6.1
- (no CPE)range: < 4.2.3-lp152.7.3.1
- (no CPE)range: < 4.3.4-2.2
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 1.2.1-4.2.3
- (no CPE)range: < 4.2.3-3.15.4
- (no CPE)range: < 4.2.3-3.15.4
- (no CPE)range: < 4.2.3-3.15.4
- (no CPE)range: < 4.2.3-3.15.4
- (no CPE)range: < 4.2.3-3.15.4
- (no CPE)range: < 4.2.3-3.15.4
Patches
Vulnerability mechanics
References
7- github.com/zeromq/libzmq/pull/3913nvdPatchThird Party Advisory
- github.com/zeromq/libzmq/pull/3973nvdPatchThird Party Advisory
- github.com/zeromq/libzmq/security/advisories/GHSA-25wp-cf8g-938mnvdPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/11/msg00017.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202009-12nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZ5IMNQXDB52JFBXHFLK4AHVORFELNNG/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YFW2ZELCCPS4VLU4OSJOH5YL6KFKTFYW/nvd
News mentions
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