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

red hat
Calendar Grey September 30, 2020
Scroller Redhat
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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