RHSA-2020:4082 - Security Advisory

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 impact of Important. 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.

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.

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

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le

Fixes

• BZ - 1798534 - CVE-2019-12528 squid: Information Disclosure issue in FTP Gateway
• BZ - 1798540 - CVE-2020-8449 squid: Improper input validation issues in HTTP Request processing
• BZ - 1798552 - CVE-2020-8450 squid: Buffer overflow in reverse-proxy configurations
• BZ - 1852550 - CVE-2020-15049 squid: Request smuggling and poisoning attack against the HTTP cache
• BZ - 1871700 - CVE-2020-15810 squid: HTTP Request Smuggling could result in cache poisoning
• BZ - 1871702 - CVE-2020-15811 squid: HTTP Request Splitting could result in cache poisoning
• BZ - 1871705 - CVE-2020-24606 squid: Improper input validation could result in a DoS

CVEs

• CVE-2019-12528
• CVE-2020-8449
• CVE-2020-8450
• CVE-2020-15049
• CVE-2020-15810
• CVE-2020-15811
• CVE-2020-24606

References

• https://access.redhat.com/security/updates/classification/#important