CVE-2021-20235
Summary
| CVE | CVE-2021-20235 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-04-01 14:15:00 UTC |
| Updated | 2023-11-07 03:29:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: CWE-787
NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Heap overflow when receiving malformed ZMTP v1 packets (CURVE disabled) · Advisory · zeromq/libzmq · GitHub | MISC | github.com | |
| 1921983 – (CVE-2021-20235) CVE-2021-20235 zeromq: Heap overflow when receiving malformed ZMTP v1 packets | MISC | bugzilla.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 180339 Debian Security Update for zeromq3 (CVE-2021-20235)