Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2019.1072
ruby2.1 security update
1 April 2019
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AusCERT Security Bulletin Summary
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Product: ruby2.1
Publisher: Debian
Operating System: Debian GNU/Linux 8
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Delete Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-8325 CVE-2019-8324 CVE-2019-8323
CVE-2019-8322 CVE-2019-8320
Reference: ESB-2019.0821
ESB-2019.0678
Original Bulletin:
https://lists.debian.org/debian-lts-announce/2019/03/msg00037.html
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Package : ruby2.1
Version : 2.1.5-2+deb8u7
CVE ID : CVE-2019-8320 CVE-2019-8322 CVE-2019-8323 CVE-2019-8324
CVE-2019-8325
Several vulnerabilities have been discovered in rubygems embedded in
ruby2.1, the interpreted scripting language.
CVE-2019-8320
A Directory Traversal issue was discovered in RubyGems. Before
making new directories or touching files (which now include
path-checking code for symlinks), it would delete the target
destination.
CVE-2019-8322
The gem owner command outputs the contents of the API response
directly to stdout. Therefore, if the response is crafted, escape
sequence injection may occur.
CVE-2019-8323
Gem::GemcutterUtilities#with_response may output the API response to
stdout as it is. Therefore, if the API side modifies the response,
escape sequence injection may occur.
CVE-2019-8324
A crafted gem with a multi-line name is not handled correctly.
Therefore, an attacker could inject arbitrary code to the stub line
of gemspec, which is eval-ed by code in ensure_loadable_spec during
the preinstall check.
CVE-2019-8325
An issue was discovered in RubyGems 2.6 and later through 3.0.2.
Since Gem::CommandManager#run calls alert_error without escaping,
escape sequence injection is possible. (There are many ways to cause
an error.)
For Debian 8 "Jessie", these problems have been fixed in version
2.1.5-2+deb8u7.
We recommend that you upgrade your ruby2.1 packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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