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AUSCERT External Security Bulletin Redistribution
ESB-2017.2347
CVE-2017-0898: Buffer underrun vulnerability in Kernel.sprintf
15 September 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Ruby
Publisher: Ruby
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-0898
Original Bulletin:
https://www.ruby-lang.org/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/
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CVE-2017-0898: Buffer underrun vulnerability in Kernel.sprintf
Posted by usa on 14 Sep 2017
There is a buffer underrun vulnerability in the sprintf method of Kernel
module. This vulnerability has been assigned the CVE identifier CVE-2017-0898.
Details
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.
All users running an affected release should upgrade immediately.
Affected Versions
Ruby 2.2 series: 2.2.7 and earlier
Ruby 2.3 series: 2.3.4 and earlier
Ruby 2.4 series: 2.4.1 and earlier
prior to trunk revision 58453
Credit
Thanks to aerodudrizzt for reporting this issue.
History
Originally published at 2017-09-14 12:00:00 (UTC)
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