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.
References (1)
Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/litespeedtech/openlitespeed/issues/117
Scores
CVSS v3
6.5
EPSS
0.0124
EPSS Percentile
65.5%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-20
Status
published
Products (2)
litespeedtech/openlitespeed
1.5.0 (6 CPE variants)
litespeedtech/openlitespeed
< 1.5.0
Published
Dec 03, 2018
Tracked Since
Feb 18, 2026