CVE-2014-9721

medium
Published 2015-06-03 ยท Modified 2026-05-06
CVSS v3
โ€”
CVSS v4 NEW
โ€”
not yet in upstream
VIR risk
4.3

Description

libzmq before 4.0.6 and 4.1.x before 4.1.1 allows remote attackers to conduct downgrade attacks and bypass ZMTP v3 protocol security mechanisms via a ZMTP v2 or earlier header.

Predictions

Exploit likelihood
20%
Patch ETA
โ€”

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or โ€” if you've already worked around this in production โ€” publish your fix to the community-verified tier.

โœš Propose a mitigation on Community โ†’ Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OSVersionStatusFixed in
suse slesaffected
debian debianbookwormfixed4.0.5+dfsg-3
debian debianbullseyefixed4.0.5+dfsg-3
debian debianforkyfixed4.0.5+dfsg-3
debian debiansidfixed4.0.5+dfsg-3
debian debiantrixiefixed4.0.5+dfsg-3

Application impact

VendorProductVersionsFixed
zeromqzeromq{"endIncluding":"4.0.5"}
zeromqzeromq4.1.0

References

CWEs

CWE-20

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.