CVE-2019-20637

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

08/04/2020

Last modified:

02/08/2022

Description

An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does not clear a pointer between the handling of one client request and the next request within the same connection. This sometimes causes information to be disclosed from the connection workspace, such as data structures associated with previous requests within this connection or VCL-related temporary headers.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

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

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:varnish-cache:varnish_cache:::::-:::*	6.1.0 (including)	6.2.2 (excluding)
cpe:2.3:a:varnish-cache:varnish_cache:::::-:::*	6.3.0 (including)	6.3.1 (excluding)
cpe:2.3:a:varnish-software:varnish_cache:::::lts:::*	6.0.0 (including)	6.0.5 (excluding)
cpe:2.3:a:opensuse:backports_sle:15.0:sp1::::::
cpe:2.3:o:opensuse:leap:15.1:::::::*

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

CVE-2019-20637

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools