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AUSCERT External Security Bulletin Redistribution
Multiple vulnerabilities in RubyGems
5 March 2019
AusCERT Security Bulletin Summary
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Delete Arbitrary Files -- Existing Account
Execute Arbitrary Code/Commands -- Existing Account
CVE Names: CVE-2019-8325 CVE-2019-8324 CVE-2019-8323
CVE-2019-8322 CVE-2019-8321 CVE-2019-8320
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Multiple vulnerabilities in RubyGems
Posted by hsbt on 5 Mar 2019
There are multiple vulnerabilities in RubyGems bundled by Ruby. It is reported
at the official blog of RubyGems .
The following vulnerabilities have been reported.
o CVE-2019-8320: Delete directory using symlink when decompressing tar
o CVE-2019-8321: Escape sequence injection vulnerability in verbose
o CVE-2019-8322: Escape sequence injection vulnerability in gem owner
o CVE-2019-8323: Escape sequence injection vulnerability in API response
o CVE-2019-8324: Installing a malicious gem may lead to arbitrary code
o CVE-2019-8325: Escape sequence injection vulnerability in errors
It is strongly recommended for Ruby users to take one of the following
workarounds as soon as possible.
o Ruby 2.4 series: 2.4.5 and earlier
o Ruby 2.5 series: 2.5.3 and earlier
o Ruby 2.6 series: 2.6.1 and earlier
o prior to trunk revision XXXXXX
RubyGems 2.7.6/3.0.3 or later includes the fix for the vulnerabilities, so
upgrade RubyGems to the latest version.
gem update --system
If you can t upgrade RubyGems, you can apply the following patches as a
o for Ruby 2.4.5
o for Ruby 2.5.3
o for Ruby 2.6.1
About the trunk, update to the latest revision.
This report is based on the official blog of RubyGems .
o Originally published at 2019-03-05 00:00:00 UTC
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