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CVE-2019-20637

nvd nist
Published: Apr 8, 2020Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploitability: 3.9 / Impact: 3.6
Source: NVD

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.

Affected (5)

Varnish Cache
1 product
Varnish Cache
Varnish Software
1 product
Varnish Cache
Opensuse
2 products
Backports Sle
Leap
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Varnish Cache
Varnish Cache
From 6.1.0 to 6.2.2
Varnish Cache
From 6.3.0 to 6.3.1
Varnish Cache
From 6.0.0 to 6.0.5
Configuration B
2 vulnerable
Vulnerable SoftwareAffected Versions
Backports Sle
Version 15.0 sp1
Leap
Version 15.1

Related CWEs

CWE-212
Improper Removal of Sensitive Information Before Storage or Transfer
The product stores, transfers, or shares a resource that contains sensitive information, but it does not properly remove that information before the product makes the resource available to unauthorized actors.

References (6)

Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.