VULNERABILITY INTELLIGENCE

CVE-2023-28320

CVSS score5.9 MEDIUM
EPSS probability2.66%
CISA KEVNot currently listed
Published2023-05-26
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.

Weakness classification

  • support@hackerone.com: CWE-400
  • nvd@nist.gov: CWE-362

Primary references