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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2055 ruby2.1 security update 16 July 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ruby2.1 Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Create Arbitrary Files -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Cross-site Scripting -- Remote with User Interaction Provide Misleading Information -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2018-1000079 CVE-2018-1000078 CVE-2018-1000077 CVE-2018-1000076 CVE-2018-1000075 CVE-2018-8780 CVE-2018-8779 CVE-2018-8778 CVE-2018-8777 CVE-2018-6914 CVE-2017-17790 CVE-2017-17742 CVE-2017-17405 CVE-2017-14064 CVE-2017-14033 CVE-2017-10784 CVE-2017-0903 CVE-2017-0902 CVE-2017-0901 CVE-2017-0900 CVE-2017-0899 CVE-2017-0898 CVE-2016-7798 CVE-2016-2339 CVE-2015-9096 Reference: ESB-2018.1767 ESB-2018.1047.2 ASB-2017.0137 ESB-2017.1016 Original Bulletin: https://security-tracker.debian.org/tracker/DLA-1421-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Package : ruby2.1 Version : 2.1.5-2+deb8u4 CVE ID : CVE-2015-9096 CVE-2016-2339 CVE-2016-7798 CVE-2017-0898 CVE-2017-0899 CVE-2017-0900 CVE-2017-0901 CVE-2017-0902 CVE-2017-0903 CVE-2017-10784 CVE-2017-14033 CVE-2017-14064 CVE-2017-17405 CVE-2017-17742 CVE-2017-17790 CVE-2018-6914 CVE-2018-8777 CVE-2018-8778 CVE-2018-8779 CVE-2018-8780 CVE-2018-1000075 CVE-2018-1000076 CVE-2018-1000077 CVE-2018-1000078 CVE-2018-1000079 Debian Bug : 851161 Multiple vulnerabilities were found in the interpreter for the Ruby language. The Common Vulnerabilities and Exposures project identifies the following issues: CVE-2015-9096 SMTP command injection in Net::SMTP via CRLF sequences in a RCPT TO or MAIL FROM command. CVE-2016-2339 Exploitable heap overflow in Fiddle::Function.new. CVE-2016-7798 Incorrect handling of initialization vector in the GCM mode in the OpenSSL extension. CVE-2017-0898 Buffer underrun vulnerability in Kernel.sprintf. CVE-2017-0899 ANSI escape sequence vulnerability in RubyGems. CVE-2017-0900 DoS vulnerability in the RubyGems query command. CVE-2017-0901 gem installer allowed a malicious gem to overwrite arbitrary files. CVE-2017-0902 RubyGems DNS request hijacking vulnerability. CVE-2017-0903 Max Justicz reported that RubyGems is prone to an unsafe object deserialization vulnerability. When parsed by an application which processes gems, a specially crafted YAML formatted gem specification can lead to remote code execution. CVE-2017-10784 Yusuke Endoh discovered an escape sequence injection vulnerability in the Basic authentication of WEBrick. An attacker can take advantage of this flaw to inject malicious escape sequences to the WEBrick log and potentially execute control characters on the victim's terminal emulator when reading logs. CVE-2017-14033 asac reported a buffer underrun vulnerability in the OpenSSL extension. A remote attacker could take advantage of this flaw to cause the Ruby interpreter to crash leading to a denial of service. CVE-2017-14064 Heap memory disclosure in the JSON library. CVE-2017-17405 A command injection vulnerability in Net::FTP might allow a malicious FTP server to execute arbitrary commands. CVE-2017-17742 Aaron Patterson reported that WEBrick bundled with Ruby was vulnerable to an HTTP response splitting vulnerability. It was possible for an attacker to inject fake HTTP responses if a script accepted an external input and output it without modifications. CVE-2017-17790 A command injection vulnerability in lib/resolv.rb's lazy_initialze might allow a command injection attack. However untrusted input to this function is rather unlikely. CVE-2018-6914 ooooooo_q discovered a directory traversal vulnerability in the Dir.mktmpdir method in the tmpdir library. It made it possible for attackers to create arbitrary directories or files via a .. (dot dot) in the prefix argument. CVE-2018-8777 Eric Wong reported an out-of-memory DoS vulnerability related to a large request in WEBrick bundled with Ruby. CVE-2018-8778 aerodudrizzt found a buffer under-read vulnerability in the Ruby String#unpack method. If a big number was passed with the specifier @, the number was treated as a negative value, and an out-of-buffer read occurred. Attackers could read data on heaps if an script accepts an external input as the argument of String#unpack. CVE-2018-8779 ooooooo_q reported that the UNIXServer.open and UNIXSocket.open methods of the socket library bundled with Ruby did not check for NUL bytes in the path argument. The lack of check made the methods vulnerable to unintentional socket creation and unintentional socket access. CVE-2018-8780 ooooooo_q discovered an unintentional directory traversal in some methods in Dir, by the lack of checking for NUL bytes in their parameter. CVE-2018-1000075 A negative size vulnerability in ruby gem package tar header that could cause an infinite loop. CVE-2018-1000076 RubyGems package improperly verifies cryptographic signatures. A mis-signed gem could be installed if the tarball contains multiple gem signatures. CVE-2018-1000077 An improper input validation vulnerability in RubyGems specification homepage attribute could allow malicious gem to set an invalid homepage URL. CVE-2018-1000078 Cross Site Scripting (XSS) vulnerability in gem server display of homepage attribute. CVE-2018-1000079 Path Traversal vulnerability during gem installation. For Debian 8 "Jessie", these problems have been fixed in version 2.1.5-2+deb8u4. 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 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBW0v6HWaOgq3Tt24GAQjcdQ//cNDIkBjBy1V97nuwDqumWkPNLE4AgMq9 HY6founzFKYG5wVSHkPd3MO6fOq2LtTwQnmjqQaUDzo5rny00XgSniaPkL3cCbYT W8LtEbI5cAnGCTTasNSykJXwErYlpCnE12Ez8YLbs9ZZ6ymhp/kcZiOGUaVoB5bk s06MCAw2tazkbGZTZQW8dedixkZP1QJMmi4SCAIKreG93BIq1pYstbkHTz4q0DVq CIvoBUmLJX6/TkivuWrt/S0rJfpMKOtqrylohTGXfPhlBL4FkNxZo0kGS2W2Wju6 HkkueWQEWRxtIZAdcPq/F5pcmpdB+F3UiaFFa+3gDaeklAnyoYE48wMK2JP9tH5x w8uwzY/jkdgVupYn9r+39PyNE70t24qJbBRgSXSs2EFbIuzukQWknRsk55kteLd0 OhtCErqQa48nztkgJS3BSIXFa+1+Q9LX9aKS/jAecPsnCjq4dtxSeTcGlxJgzet+ MSouVv5XtHavRkPK3/9Iya+c5YFu/9sUuEq9BifMtslerHelRuzYiFtniHUkoOPM i032mZrcM0vyrkspoVRZZ8LgeqhLXerAiOH7OV88sQNtPFt6OpQsftXsA38twVvt wY9j4dDgnKQbi93O1EouijgUclTO9HMmqU8H3dJtIbMdBzH9s1o6pnHKaI65dojj 8S2d5F1NXxk= =wB7v -----END PGP SIGNATURE-----