Candidate: CVE-2021-20237
PublicDate: 2021-05-28 11:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20237
 https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw
Description:
 An uncontrolled resource consumption (memory leak) flaw was found in
 ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote
 unauthenticated attacker to send crafted PUB messages that consume
 excessive memory if the CURVE/ZAP authentication is disabled on the server,
 causing a denial of service. The highest threat from this vulnerability is
 to system availability.
Ubuntu-Description:
Notes:
Mitigation:
Bugs:
 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22344
Priority: low
Discovered-by:
Assigned-to:
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H [7.5 HIGH]


Patches_zeromq3:
 upstream: https://github.com/zeromq/libzmq/pull/3935
upstream_zeromq3: released (4.3.3-1)
precise/esm_zeromq3: DNE
trusty_zeromq3: ignored (out of standard support)
trusty/esm_zeromq3: needs-triage
xenial_zeromq3: ignored (end of standard support, was needs-triage)
bionic_zeromq3: needs-triage
focal_zeromq3: needs-triage
groovy_zeromq3: ignored (reached end-of-life)
hirsute_zeromq3: not-affected (4.3.4-1)
impish_zeromq3: not-affected (4.3.4-1)
jammy_zeromq3: not-affected (4.3.4-1)
devel_zeromq3: not-affected (4.3.4-1)