There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2021-04-01T13:47:05

Updated: 2024-08-03T17:37:22.831Z

Reserved: 2020-12-17T00:00:00

Link: CVE-2021-20235

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-04-01T14:15:13.217

Modified: 2024-11-21T05:46:11.220

Link: CVE-2021-20235

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-09-07T00:00:00Z

Links: CVE-2021-20235 - Bugzilla