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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: squid:4 security, bug fix, and enhancement update
Advisory ID:       RHSA-2021:4292-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4292
Issue date:        2021-11-09
CVE Names:         CVE-2021-28651 CVE-2021-28652 CVE-2021-28662 
                   CVE-2021-31806 CVE-2021-31807 CVE-2021-31808 
                   CVE-2021-33620 
=====================================================================

1. Summary:

An update for the squid:4 module is now available for Red Hat Enterprise
Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

3. Description:

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

The following packages have been upgraded to a later upstream version:
squid (4.15). (BZ#1964384)

Security Fix(es):

* squid: denial of service in URN processing (CVE-2021-28651)

* squid: denial of service issue in Cache Manager (CVE-2021-28652)

* squid: denial of service in HTTP response processing (CVE-2021-28662)

* squid: improper input validation in HTTP Range header (CVE-2021-31806)

* squid: incorrect memory management in HTTP Range header (CVE-2021-31807)

* squid: integer overflow in HTTP Range header (CVE-2021-31808)

* squid: denial of service in HTTP response processing (CVE-2021-33620)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.5 Release Notes linked from 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/):

1959537 - CVE-2021-33620 squid: denial of service in HTTP response processing
1962243 - CVE-2021-28651 squid: denial of service in URN processing
1962246 - CVE-2021-28652 squid: denial of service issue in Cache Manager
1962254 - CVE-2021-28662 squid: denial of service in HTTP response processing
1962595 - CVE-2021-31806 squid: improper input validation in HTTP Range header
1962597 - CVE-2021-31807 squid: incorrect memory management in HTTP Range header
1962599 - CVE-2021-31808 squid: integer overflow in HTTP Range header

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src.rpm
squid-4.15-1.module+el8.5.0+11469+24c223d9.src.rpm

aarch64:
libecap-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64.rpm
libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64.rpm
libecap-debugsource-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64.rpm
libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64.rpm
squid-4.15-1.module+el8.5.0+11469+24c223d9.aarch64.rpm
squid-debuginfo-4.15-1.module+el8.5.0+11469+24c223d9.aarch64.rpm
squid-debugsource-4.15-1.module+el8.5.0+11469+24c223d9.aarch64.rpm

ppc64le:
libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le.rpm
libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le.rpm
libecap-debugsource-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le.rpm
libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le.rpm
squid-4.15-1.module+el8.5.0+11469+24c223d9.ppc64le.rpm
squid-debuginfo-4.15-1.module+el8.5.0+11469+24c223d9.ppc64le.rpm
squid-debugsource-4.15-1.module+el8.5.0+11469+24c223d9.ppc64le.rpm

s390x:
libecap-1.0.1-2.module+el8.1.0+4044+36416a77.s390x.rpm
libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.s390x.rpm
libecap-debugsource-1.0.1-2.module+el8.1.0+4044+36416a77.s390x.rpm
libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.s390x.rpm
squid-4.15-1.module+el8.5.0+11469+24c223d9.s390x.rpm
squid-debuginfo-4.15-1.module+el8.5.0+11469+24c223d9.s390x.rpm
squid-debugsource-4.15-1.module+el8.5.0+11469+24c223d9.s390x.rpm

x86_64:
libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64.rpm
libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64.rpm
libecap-debugsource-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64.rpm
libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64.rpm
squid-4.15-1.module+el8.5.0+11469+24c223d9.x86_64.rpm
squid-debuginfo-4.15-1.module+el8.5.0+11469+24c223d9.x86_64.rpm
squid-debugsource-4.15-1.module+el8.5.0+11469+24c223d9.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-2021-28651
https://access.redhat.com/security/cve/CVE-2021-28652
https://access.redhat.com/security/cve/CVE-2021-28662
https://access.redhat.com/security/cve/CVE-2021-31806
https://access.redhat.com/security/cve/CVE-2021-31807
https://access.redhat.com/security/cve/CVE-2021-31808
https://access.redhat.com/security/cve/CVE-2021-33620
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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