Information Exposure Affecting varnish:6/varnish-docs package, versions <0:6.0.6-2.module+el8.3.0+6843+b3b42fcc


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.15% (53rd percentile)

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  • Snyk IDSNYK-RHEL8-VARNISH-3877934
  • published26 Jul 2021
  • disclosed21 Oct 2019

Introduced: 21 Oct 2019

CVE-2019-20637  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade RHEL:8 varnish:6/varnish-docs to version 0:6.0.6-2.module+el8.3.0+6843+b3b42fcc or higher.
This issue was patched in RHSA-2020:4756.

NVD Description

Note: Versions mentioned in the description apply only to the upstream varnish:6/varnish-docs package and not the varnish:6/varnish-docs package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

CVSS Scores

version 3.1