RHSA-2020:2769 - Security Advisory

Topic

An update for ruby is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions.

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

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.

Security Fix(es):

• rubygems: Installing a malicious gem may lead to arbitrary code execution (CVE-2019-8324)
• ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives (CVE-2018-16396)
• rubygems: Escape sequence injection vulnerability in verbose (CVE-2019-8321)
• rubygems: Escape sequence injection vulnerability in gem owner (CVE-2019-8322)
• rubygems: Escape sequence injection vulnerability in API response handling (CVE-2019-8323)
• rubygems: Escape sequence injection vulnerability in errors (CVE-2019-8325)

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

Affected Products

• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - TUS 7.4 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64

Fixes

• BZ - 1643089 - CVE-2018-16396 ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives
• BZ - 1692514 - CVE-2019-8321 rubygems: Escape sequence injection vulnerability in verbose
• BZ - 1692516 - CVE-2019-8322 rubygems: Escape sequence injection vulnerability in gem owner
• BZ - 1692519 - CVE-2019-8323 rubygems: Escape sequence injection vulnerability in API response handling
• BZ - 1692520 - CVE-2019-8324 rubygems: Installing a malicious gem may lead to arbitrary code execution
• BZ - 1692522 - CVE-2019-8325 rubygems: Escape sequence injection vulnerability in errors

CVEs

• CVE-2018-16396
• CVE-2019-8321
• CVE-2019-8322
• CVE-2019-8323
• CVE-2019-8324
• CVE-2019-8325

References

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