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Ubuntu: USN-4920-1 (CVE-2021-20235): ZeroMQ vulnerabilities

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Ubuntu: USN-4920-1 (CVE-2021-20235): ZeroMQ vulnerabilities

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
04/01/2021
Created
03/29/2023
Added
03/22/2023
Modified
05/01/2023

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.

Solution(s)

  • ubuntu-upgrade-libzmq3
  • ubuntu-upgrade-libzmq5

References

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