Bug 1772362 (CVE-2019-20637) - CVE-2019-20637 varnish: not clearing pointer between two client requests leads to information disclosure
Summary: CVE-2019-20637 varnish: not clearing pointer between two client requests lead...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-20637
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
: 1813877 (view as bug list)
Depends On: 1772363 1790907 1790920 1790921
Blocks: 1772366 1813873
TreeView+ depends on / blocked
 
Reported: 2019-11-14 09:09 UTC by Marian Rehak
Modified: 2020-11-04 03:37 UTC (History)
5 users (show)

Fixed In Version: varnish 6.3.1, varnish 6.2.2
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Environment:
Last Closed: 2020-11-04 02:23:13 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4756 0 None None None 2020-11-04 03:37:12 UTC

Description Marian Rehak 2019-11-14 09:09:21 UTC 
A bug has been discovered in Varnish Cache where we fail to clear a pointer between the handling of one client requests and the next on the same connection. This can under specific circumstances lead to information being leaked from the connection workspace.

Upstream Reference:

http://varnish-cache.org/security/VSV00004.html#vsv00004
Comment 1 Marian Rehak 2019-11-14 09:14:48 UTC 
Created varnish tracking bugs for this issue:

Affects: fedora-all [bug 1772363]
Comment 4 Marco Benatto 2020-01-14 14:41:16 UTC 
Upstream commit for this issue:

https://github.com/varnishcache/varnish-cache/commit/bd7b3d6d47ccbb5e1747126f8e2a297f38e56b8c
Comment 5 Ingvar Hagelund 2020-02-24 09:56:22 UTC 
VSV00004 was fixed in rawhide 2019-10-22.

f29
Submitted: 2019-10-22
Testing:   2010-10-25
Stable:    2019-11-02

f30
Submitted: 2019-10-22
Testing:   2010-10-25
Stable:    2019-11-03

f31
Submitted: 2019-10-22
Testing:   2010-10-23
Stable:    2019-10-31
Comment 6 Marian Rehak 2020-03-17 09:25:44 UTC 
*** Bug 1813877 has been marked as a duplicate of this bug. ***
Comment 7 Doran Moppert 2020-04-01 09:12:55 UTC 
Please do not close Security Response / vulnerability bugs, the Fedora tracking bug 1772363 is the correct one to track Fedora updates.
Comment 9 Product Security DevOps Team 2020-11-04 02:23:13 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-20637
Comment 10 errata-xmlrpc 2020-11-04 03:37:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4756 https://access.redhat.com/errata/RHSA-2020:4756
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