DEBIAN-CVE-2021-20235

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Source
https://security-tracker.debian.org/tracker/CVE-2021-20235
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20235.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-20235
Upstream
Published
2021-04-01T14:15:13Z
Modified
2025-09-19T06:19:53Z
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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / zeromq3

Package

Name
zeromq3
Purl
pkg:deb/debian/zeromq3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / zeromq3

Package

Name
zeromq3
Purl
pkg:deb/debian/zeromq3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / zeromq3

Package

Name
zeromq3
Purl
pkg:deb/debian/zeromq3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}