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Red Hat Enterprise Linux: RHSA-2020-4082-01 Critical Squid Security Patch

red hat
Calendar Grey September 30, 2020
Dist Redhat Esm H88
Essential squid enhancement patch resolves key vulnerabilities in Red Hat Enterprise Linux concerning cache poisoning and denial-of-service threats.
An update for squid is now available for Red Hat Enterprise Linux 7

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory buffer overflow DoS Red Hat Enterprise Linux cache poisoning HTTP request smuggling HTTP request splitting

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

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

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory buffer overflow DoS Red Hat Enterprise Linux cache poisoning HTTP request smuggling HTTP request splitting

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

Bugs Fixed

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

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