CVE-2023-32067CWE-400

0-byte UDP payload DoS in c-ares

High · published May 25, 2023

CVSS v3.1
7.5
EPSS
2%
Percentile
75.1
In the wild
Unconfirmed
What it is

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01564 · 75.1th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2023-05-25T22:49Z
EPSS history
Timeline
  • 25 MAY 22:49Z
    0-byte UDP payload DoS in c-ares
    cvelistv5