DEBIAN-CVE-2021-20235
- Source
- https://security-tracker.debian.org/tracker/CVE-2021-20235
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20235.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2021-20235
- Upstream
- Published
- 2021-04-01T14:15:13.217Z
- Modified
- 2025-11-19T02:01:14.947784Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:11 / zeromq3
Package
- Name
- zeromq3
- Purl
- pkg:deb/debian/zeromq3?arch=source
Debian:12 / zeromq3
Package
- Name
- zeromq3
- Purl
- pkg:deb/debian/zeromq3?arch=source
Debian:13 / zeromq3
Package
- Name
- zeromq3
- Purl
- pkg:deb/debian/zeromq3?arch=source
Debian:14 / zeromq3
Package
- Name
- zeromq3
- Purl
- pkg:deb/debian/zeromq3?arch=source