Synopsis
Moderate: rh-ruby24-ruby security, bug fix, and enhancement update
Type/Severity
Security Advisory: Moderate
Topic
An update for rh-ruby24-ruby is now available for Red Hat Software Collections.
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
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.
The following packages have been upgraded to a later upstream version: rh-ruby24-ruby (2.4.2). (BZ#1506785)
Security Fix(es):
- A buffer underflow was found in ruby's sprintf function. An attacker, with ability to control its format string parameter, could send a specially crafted string that would disclose heap memory or crash the interpreter. (CVE-2017-0898)
- It was found that rubygems did not sanitize gem names during installation of a given gem. A specially crafted gem could use this flaw to install files outside of the regular directory. (CVE-2017-0901)
- A vulnerability was found where rubygems did not sanitize DNS responses when requesting the hostname of the rubygems server for a domain, via a _rubygems._tcp DNS SRV query. An attacker with the ability to manipulate DNS responses could direct the gem command towards a different domain. (CVE-2017-0902)
- A vulnerability was found where the rubygems module was vulnerable to an unsafe YAML deserialization when inspecting a gem. Applications inspecting gem files without installing them can be tricked to execute arbitrary code in the context of the ruby interpreter. (CVE-2017-0903)
- It was found that WEBrick did not sanitize all its log messages. If logs were printed in a terminal, an attacker could interact with the terminal via the use of escape sequences. (CVE-2017-10784)
- A vulnerability was found where rubygems did not properly sanitize gems' specification text. A specially crafted gem could interact with the terminal via the use of escape sequences. (CVE-2017-0899)
- It was found that rubygems could use an excessive amount of CPU while parsing a sufficiently long gem summary. A specially crafted gem from a gem repository could freeze gem commands attempting to parse its summary. (CVE-2017-0900)
- A buffer overflow vulnerability was found in the JSON extension of ruby. An attacker with the ability to pass a specially crafted JSON input to the extension could use this flaw to expose the interpreter's heap memory. (CVE-2017-14064)
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 Software Collections (for RHEL Server) 1 for RHEL 7.6 x86_64
-
Red Hat Software Collections (for RHEL Server) 1 for RHEL 7.5 x86_64
-
Red Hat Software Collections (for RHEL Server) 1 for RHEL 7.4 x86_64
-
Red Hat Software Collections (for RHEL Server) 1 for RHEL 7.3 x86_64
-
Red Hat Software Collections (for RHEL Server) 1 for RHEL 7 x86_64
-
Red Hat Software Collections (for RHEL Server) 1 for RHEL 6.7 x86_64
-
Red Hat Software Collections (for RHEL Server) 1 for RHEL 6 x86_64
-
Red Hat Software Collections (for RHEL Workstation) 1 for RHEL 7 x86_64
-
Red Hat Software Collections (for RHEL Workstation) 1 for RHEL 6 x86_64
Fixes
- BZ - 1487552 - CVE-2017-14064 ruby: Arbitrary heap exposure during a JSON.generate call
- BZ - 1487587 - CVE-2017-0901 rubygems: Arbitrary file overwrite due to incorrect validation of specification name
- BZ - 1487588 - CVE-2017-0900 rubygems: No size limit in summary length of gem spec
- BZ - 1487589 - CVE-2017-0902 rubygems: DNS hijacking vulnerability
- BZ - 1487590 - CVE-2017-0899 rubygems: Escape sequence in the "summary" field of gemspec
- BZ - 1492012 - CVE-2017-10784 ruby: Escape sequence injection vulnerability in the Basic authentication of WEBrick
- BZ - 1492015 - CVE-2017-0898 ruby: Buffer underrun vulnerability in Kernel.sprintf
- BZ - 1500488 - CVE-2017-0903 rubygems: Unsafe object deserialization through YAML formatted gem specifications
- BZ - 1506785 - Rebase to the latest Ruby 2.4 point release [rhscl-3.0.z]
CVEs
References
Vulmon