Bug 1798534 (CVE-2019-12528)

Summary:	CVE-2019-12528 squid: Information Disclosure issue in FTP Gateway
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akarimi, anon.amish, code, icesalov, janarula, jonathansteffan, luhliari, rcarrier, simore, tcrider, uwe.knop, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---	Flags:	icesalov: needinfo? (luhliari)
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	squid 4.10	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in squid. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users' sessions or non-Squid processes.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-09-30 09:57:05 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1798535, 1802512, 1802517
Bug Blocks:	1798558

Description Pedro Sampaio 2020-02-05 14:51:59 UTC

An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users' sessions or non-Squid processes.

References:

http://www.squid-cache.org/Advisories/SQUID-2020_2.txt

Comment 1 Pedro Sampaio 2020-02-05 14:53:00 UTC

Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1798535]

Comment 2 Stefan Cornelius 2020-02-13 10:26:05 UTC

Mitigation:

As a workaround, it is possible to disable support for FTP. In order to do so, remove the following line from your squid configuration file:
acl Safe_ports 21

Then add the following lines to your squid configuration file:
acl FTP proto FTP
http_access deny FTP

Comment 9 errata-xmlrpc 2020-09-30 07:00:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4082 https://access.redhat.com/errata/RHSA-2020:4082

Comment 10 Product Security DevOps Team 2020-09-30 09:57:05 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-2019-12528

Comment 11 errata-xmlrpc 2020-11-04 03:31:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4743 https://access.redhat.com/errata/RHSA-2020:4743

Comment 12 Eric Christensen 2021-03-26 15:51:27 UTC

External References:

http://www.squid-cache.org/Advisories/SQUID-2020_2.txt