VULNERABILITY INTELLIGENCE

CVE-2018-19791

CVSS score6.5 MEDIUM
EPSS probability1.24%
CISA KEVNot currently listed
Published2018-12-03
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

The server in LiteSpeed OpenLiteSpeed before 1.5.0 RC6 does not correctly handle requests for byte sequences, allowing an attacker to amplify the response size by requesting the entire response body repeatedly, as demonstrated by an HTTP Range header value beginning with the "bytes=0-,0-" substring.

Weakness classification

  • CWE-20: Improper Input Validation

Primary references