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Red Hat Security Advisory

Synopsis: Important: squid security update
Advisory ID: RHSA-2020:4082-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4082
Issue date: 2020-09-30
CVE Names: CVE-2019-12528 CVE-2020-8449 CVE-2020-8450
CVE-2020-15049 CVE-2020-15810 CVE-2020-15811
CVE-2020-24606
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1. Summary:

An update for squid is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server (v. 7) – ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) – ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) – x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) – x86_64

3. Description:

Squid is a high-performance proxy caching server for web clients,
supporting FTP, Gopher, and HTTP data objects.

Security Fix(es):

* squid: HTTP Request Smuggling could result in cache poisoning
(CVE-2020-15810)

* squid: HTTP Request Splitting could result in cache poisoning
(CVE-2020-15811)

* squid: Information Disclosure issue in FTP Gateway (CVE-2019-12528)

* squid: Improper input validation issues in HTTP Request processing
(CVE-2020-8449)

* squid: Buffer overflow in reverse-proxy configurations (CVE-2020-8450)

* squid: Request smuggling and poisoning attack against the HTTP cache
(CVE-2020-15049)

* squid: Improper input validation could result in a DoS (CVE-2020-24606)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the squid service will be restarted
automatically.

5. Bugs fixed (https://bugzilla.redhat.com/):

1798534 – CVE-2019-12528 squid: Information Disclosure issue in FTP Gateway
1798540 – CVE-2020-8449 squid: Improper input validation issues in HTTP Request processing
1798552 – CVE-2020-8450 squid: Buffer overflow in reverse-proxy configurations
1852550 – CVE-2020-15049 squid: Request smuggling and poisoning attack against the HTTP cache
1871700 – CVE-2020-15810 squid: HTTP Request Smuggling could result in cache poisoning
1871702 – CVE-2020-15811 squid: HTTP Request Splitting could result in cache poisoning
1871705 – CVE-2020-24606 squid: Improper input validation could result in a DoS

6. Package List:

Red Hat Enterprise Linux Server (v. 7):

Source:
squid-3.5.20-17.el7_9.4.src.rpm

ppc64:
squid-3.5.20-17.el7_9.4.ppc64.rpm
squid-debuginfo-3.5.20-17.el7_9.4.ppc64.rpm
squid-migration-script-3.5.20-17.el7_9.4.ppc64.rpm

ppc64le:
squid-3.5.20-17.el7_9.4.ppc64le.rpm
squid-debuginfo-3.5.20-17.el7_9.4.ppc64le.rpm
squid-migration-script-3.5.20-17.el7_9.4.ppc64le.rpm

s390x:
squid-3.5.20-17.el7_9.4.s390x.rpm
squid-debuginfo-3.5.20-17.el7_9.4.s390x.rpm
squid-migration-script-3.5.20-17.el7_9.4.s390x.rpm

x86_64:
squid-3.5.20-17.el7_9.4.x86_64.rpm
squid-debuginfo-3.5.20-17.el7_9.4.x86_64.rpm
squid-migration-script-3.5.20-17.el7_9.4.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
squid-debuginfo-3.5.20-17.el7_9.4.ppc64.rpm
squid-sysvinit-3.5.20-17.el7_9.4.ppc64.rpm

ppc64le:
squid-debuginfo-3.5.20-17.el7_9.4.ppc64le.rpm
squid-sysvinit-3.5.20-17.el7_9.4.ppc64le.rpm

s390x:
squid-debuginfo-3.5.20-17.el7_9.4.s390x.rpm
squid-sysvinit-3.5.20-17.el7_9.4.s390x.rpm

x86_64:
squid-debuginfo-3.5.20-17.el7_9.4.x86_64.rpm
squid-sysvinit-3.5.20-17.el7_9.4.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
squid-3.5.20-17.el7_9.4.src.rpm

x86_64:
squid-3.5.20-17.el7_9.4.x86_64.rpm
squid-debuginfo-3.5.20-17.el7_9.4.x86_64.rpm
squid-migration-script-3.5.20-17.el7_9.4.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
squid-debuginfo-3.5.20-17.el7_9.4.x86_64.rpm
squid-sysvinit-3.5.20-17.el7_9.4.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2019-12528
https://access.redhat.com/security/cve/CVE-2020-8449
https://access.redhat.com/security/cve/CVE-2020-8450
https://access.redhat.com/security/cve/CVE-2020-15049
https://access.redhat.com/security/cve/CVE-2020-15810
https://access.redhat.com/security/cve/CVE-2020-15811
https://access.redhat.com/security/cve/CVE-2020-24606
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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