CVE-2018-19791

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 52%
VendorProductVersion
litespeedtechopenlitespeed
𝑥
< 1.5.0
litespeedtechopenlitespeed
1.5.0
litespeedtechopenlitespeed
1.5.0:rc1
litespeedtechopenlitespeed
1.5.0:rc2
litespeedtechopenlitespeed
1.5.0:rc3
litespeedtechopenlitespeed
1.5.0:rc4
litespeedtechopenlitespeed
1.5.0:rc5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/litespeedtech/openlitespeed/issues/117
https://github.com/litespeedtech/openlitespeed/issues/117