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CVE-2018-19791

N/A

Published: December 3, 2018 at 06:00 AM UTC

Updated: June 17, 2026 at 01:49 AM UTC

1 product affected across 1 vendorOpenlitespeed

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Severity

N/A

Exploit prediction

EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Openlitespeed · Litespeedtech

95%

v < 1.5.01.5.0 1.5.0 rc1 1.5.0 rc2 1.5.0 rc3 1.5.0 rc4 1.5.0 rc5

Affected range stops below 1.5.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

https://github.com/litespeedtech/openlitespeed/issues/117

CVSS

4MEDIUM[email protected]

Confidentiality: NONE
Integrity: NONE
Availability: PARTIAL

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20

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