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Bug 1492015 - (CVE-2017-0898) CVE-2017-0898 ruby: Buffer underrun vulnerability in Kernel.sprintf
CVE-2017-0898 ruby: Buffer underrun vulnerability in Kernel.sprintf
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170914,repor...
: Security
Depends On: 1492016 1492017 1509448 1509449 1509450 1509451 1534437 1534438 1534937 1534941
Blocks: 1492024
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Reported: 2017-09-15 05:34 EDT by Adam Mariš
Modified: 2018-05-14 08:09 EDT (History)
30 users (show)

See Also:
Fixed In Version: ruby 2.2.8, ruby 2.3.5, ruby 2.4.2
Doc Type: If docs needed, set a value
Doc Text:
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.
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Clone Of:
Environment:
Last Closed: 2017-12-20 05:08:35 EST
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Regression: ---
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Documentation: ---
CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:3485 normal SHIPPED_LIVE Moderate: rh-ruby24-ruby security, bug fix, and enhancement update 2017-12-19 08:37:01 EST
Red Hat Product Errata RHSA-2018:0378 normal SHIPPED_LIVE Important: ruby security update 2018-02-28 20:06:17 EST
Red Hat Product Errata RHSA-2018:0583 None None None 2018-03-26 05:46 EDT
Red Hat Product Errata RHSA-2018:0585 None None None 2018-03-26 06:24 EDT

  None (edit)
Description Adam Mariš 2017-09-15 05:34:46 EDT 
There is a buffer underrun vulnerability in the sprintf method of Kernel module. If a malicious format string which contains a precious specifier (*) is passed and a huge minus value is also passed to the specifier, buffer underrun may be caused. In such situation, the result may contains heap, or the Ruby interpreter may crash.

External References:

https://www.ruby-lang.org/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/
Comment 1 Adam Mariš 2017-09-15 05:37:37 EDT 
Created ruby tracking bugs for this issue:

Affects: fedora-all [bug 1492016]


Created ruby193-ruby tracking bugs for this issue:

Affects: openshift-1 [bug 1492017]
Comment 2 Fedora Update System 2017-10-02 10:24:40 EDT 
ruby-2.4.2-84.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.
Comment 6 errata-xmlrpc 2017-12-19 03:38:47 EST 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS

Via RHSA-2017:3485 https://access.redhat.com/errata/RHSA-2017:3485
Comment 7 Cedric Buissart 2017-12-20 05:08:52 EST 
Statement:

This issue affects the versions of ruby as shipped with Red Hat Enterprise Linux 7 and the versions of rh-ruby22-ruby and rh-ruby23-ruby as shipped with Red Hat Software Collections. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 10 errata-xmlrpc 2018-02-28 15:02:59 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0378 https://access.redhat.com/errata/RHSA-2018:0378
Comment 12 errata-xmlrpc 2018-03-26 05:46:01 EDT 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS

Via RHSA-2018:0583 https://access.redhat.com/errata/RHSA-2018:0583
Comment 13 errata-xmlrpc 2018-03-26 06:24:07 EDT 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS

Via RHSA-2018:0585 https://access.redhat.com/errata/RHSA-2018:0585
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