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AUSCERT External Security Bulletin Redistribution
ESB-2020.3871
squid:4 security, bug fix, and enhancement update
6 November 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: squid:4
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-24606 CVE-2020-15049 CVE-2020-14058
CVE-2020-8450 CVE-2020-8449 CVE-2019-18860
CVE-2019-18679 CVE-2019-18678 CVE-2019-18677
CVE-2019-18676 CVE-2019-12854 CVE-2019-12529
CVE-2019-12528 CVE-2019-12526 CVE-2019-12524
CVE-2019-12523 CVE-2019-12521 CVE-2019-12520
Reference: ESB-2020.3435
ESB-2020.3406
ESB-2020.3333
ESB-2020.3054
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:4743
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Red Hat Security Advisory
Synopsis: Moderate: squid:4 security, bug fix, and enhancement update
Advisory ID: RHSA-2020:4743-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4743
Issue date: 2020-11-03
CVE Names: CVE-2019-12520 CVE-2019-12521 CVE-2019-12523
CVE-2019-12524 CVE-2019-12526 CVE-2019-12528
CVE-2019-12529 CVE-2019-12854 CVE-2019-18676
CVE-2019-18677 CVE-2019-18678 CVE-2019-18679
CVE-2019-18860 CVE-2020-8449 CVE-2020-8450
CVE-2020-14058 CVE-2020-15049 CVE-2020-24606
=====================================================================
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 (4.11). (BZ#1829467)
Security Fix(es):
* squid: Improper input validation in request allows for proxy manipulation
(CVE-2019-12520)
* squid: Off-by-one error in addStackElement allows for heap buffer
overflow and crash (CVE-2019-12521)
* squid: Improper input validation in URI processor (CVE-2019-12523)
* squid: Improper access restriction in url_regex may lead to security
bypass (CVE-2019-12524)
* squid: Heap overflow issue in URN processing (CVE-2019-12526)
* squid: Information Disclosure issue in FTP Gateway (CVE-2019-12528)
* squid: Out of bounds read in Proxy-Authorization header causes DoS
(CVE-2019-12529)
* squid: Denial of service in cachemgr.cgi (CVE-2019-12854)
* squid: Buffer overflow in URI processor (CVE-2019-18676)
* squid: Cross-Site Request Forgery issue in HTTP Request processing
(CVE-2019-18677)
* squid: HTTP Request Splitting issue in HTTP message processing
(CVE-2019-18678)
* squid: Information Disclosure issue in HTTP Digest Authentication
(CVE-2019-18679)
* squid: Mishandled HTML in the host parameter to cachemgr.cgi results in
insecure behaviour (CVE-2019-18860)
* squid: Improper input validation issues in HTTP Request processing
(CVE-2020-8449)
* squid: Buffer overflow in reverse-proxy configurations (CVE-2020-8450)
* squid: DoS in TLS handshake (CVE-2020-14058)
* 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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.3 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/):
1730523 - CVE-2019-12854 squid: Denial of service in cachemgr.cgi
1730528 - CVE-2019-12529 squid: Out of bounds read in Proxy-Authorization header causes DoS
1770349 - CVE-2019-18678 squid: HTTP Request Splitting issue in HTTP message processing
1770356 - CVE-2019-12526 squid: Heap overflow issue in URN processing
1770360 - CVE-2019-18679 squid: Information Disclosure issue in HTTP Digest Authentication
1770365 - CVE-2019-18677 squid: Cross-Site Request Forgery issue in HTTP Request processing
1770371 - CVE-2019-12523 squid: Improper input validation in URI processor
1770375 - CVE-2019-18676 squid: Buffer overflow in URI processor
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
1817121 - CVE-2019-18860 squid: Mishandled HTML in the host parameter to cachemgr.cgi results in insecure behaviour
1827558 - CVE-2019-12520 squid: Improper input validation in request allows for proxy manipulation
1827562 - CVE-2019-12521 squid: Off-by-one error in addStackElement allows for heap buffer overflow and crash
1827570 - CVE-2019-12524 squid: Improper access restriction in url_regex may lead to security bypass
1852550 - CVE-2020-15049 squid: Request smuggling and poisoning attack against the HTTP cache
1852554 - CVE-2020-14058 squid: DoS in TLS handshake
1871705 - CVE-2020-24606 squid: Improper input validation could result in a DoS
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-4.11-3.module+el8.3.0+7851+7808b5f9.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-4.11-3.module+el8.3.0+7851+7808b5f9.aarch64.rpm
squid-debuginfo-4.11-3.module+el8.3.0+7851+7808b5f9.aarch64.rpm
squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.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-4.11-3.module+el8.3.0+7851+7808b5f9.ppc64le.rpm
squid-debuginfo-4.11-3.module+el8.3.0+7851+7808b5f9.ppc64le.rpm
squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.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-4.11-3.module+el8.3.0+7851+7808b5f9.s390x.rpm
squid-debuginfo-4.11-3.module+el8.3.0+7851+7808b5f9.s390x.rpm
squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.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-4.11-3.module+el8.3.0+7851+7808b5f9.x86_64.rpm
squid-debuginfo-4.11-3.module+el8.3.0+7851+7808b5f9.x86_64.rpm
squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.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-2019-12520
https://access.redhat.com/security/cve/CVE-2019-12521
https://access.redhat.com/security/cve/CVE-2019-12523
https://access.redhat.com/security/cve/CVE-2019-12524
https://access.redhat.com/security/cve/CVE-2019-12526
https://access.redhat.com/security/cve/CVE-2019-12528
https://access.redhat.com/security/cve/CVE-2019-12529
https://access.redhat.com/security/cve/CVE-2019-12854
https://access.redhat.com/security/cve/CVE-2019-18676
https://access.redhat.com/security/cve/CVE-2019-18677
https://access.redhat.com/security/cve/CVE-2019-18678
https://access.redhat.com/security/cve/CVE-2019-18679
https://access.redhat.com/security/cve/CVE-2019-18860
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-2020-14058
https://access.redhat.com/security/cve/CVE-2020-15049
https://access.redhat.com/security/cve/CVE-2020-24606
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/
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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