Issued:

2020-11-03

Updated:

2020-11-03

RHSA-2020:4743 - Moderate: squid:4 security, bug fix, and enhancement update

Synopsis

Moderate: squid:4 security, bug fix, and enhancement update

Type/Severity

Security Advisory Moderate

Topic

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.

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.

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.

Affected Products

Updated Packages

• squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.aarch64.rpm
• squid-4.11-3.module+el8.3.0+7851+7808b5f9.aarch64.rpm
• libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64.rpm
• libecap-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64.rpm
• libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src.rpm
• libecap-devel-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
• squid-debuginfo-4.11-3.module+el8.3.0+7851+7808b5f9.aarch64.rpm
• squid-4.11-3.module+el8.3.0+7851+7808b5f9.src.rpm
• squid-4.11-3.module+el8.3.0+7851+7808b5f9.s390x.rpm
• libecap-debugsource-1.0.1-2.module+el8.1.0+4044+36416a77.s390x.rpm
• squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.s390x.rpm
• libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.s390x.rpm
• libecap-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-debuginfo-4.11-3.module+el8.3.0+7851+7808b5f9.s390x.rpm
• libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le.rpm
• squid-debuginfo-4.11-3.module+el8.3.0+7851+7808b5f9.ppc64le.rpm
• libecap-debugsource-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le.rpm
• libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le.rpm
• squid-debugsource-4.11-3.module+el8.3.0+7851+7808b5f9.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
• libecap-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
• libecap-debuginfo-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64.rpm
• squid-debugsource-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
• libecap-debugsource-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64.rpm

Fixes

• This content is not included.BZ - 1730523
• This content is not included.BZ - 1730528
• This content is not included.BZ - 1770349
• This content is not included.BZ - 1770356
• This content is not included.BZ - 1770360
• This content is not included.BZ - 1770365
• This content is not included.BZ - 1770371
• This content is not included.BZ - 1770375
• This content is not included.BZ - 1798534
• This content is not included.BZ - 1798540
• This content is not included.BZ - 1798552
• This content is not included.BZ - 1817121
• This content is not included.BZ - 1827558
• This content is not included.BZ - 1827562
• This content is not included.BZ - 1827570
• This content is not included.BZ - 1852550
• This content is not included.BZ - 1852554
• This content is not included.BZ - 1871705

CVEs

• 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

References

• 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/

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.