Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2018-19791

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
03/12/2018
Last modified:
05/02/2019

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.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
6.50
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:L/Au:S/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.00 MEDIUM
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
4.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:litespeedtech:openlitespeed:*:*:*:*:*:*:*:* 1.5.0 (excluding)
cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:-:*:*:*:*:*:*
cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc2:*:*:*:*:*:*
cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc3:*:*:*:*:*:*
cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc4:*:*:*:*:*:*
cpe:2.3:a:litespeedtech:openlitespeed:1.5.0:rc5:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools