CVE-2021-20235

2021-04-0113:47:05

CWE-120

redhat

www.cve.org

8.5 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

72.0%

JSON

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.

CNA Affected

[
  {
    "product": "zeromq",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "zeromq 4.3.3"
      }
    ]
  }
]