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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2154 rails security update 22 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: rails Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-8165 CVE-2020-8164 Reference: ESB-2020.1780 Original Bulletin: https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Package : rails Version : 2:4.1.8-1+deb8u7 CVE ID : CVE-2020-8164 CVE-2020-8165 Two vulnerabilities were found in Ruby on Rails, a MVC ruby-based framework geared for web application development, which could lead to remote code execution and untrusted user input usage, depending on the application. CVE-2020-8164 Strong parameters bypass vector in ActionPack. In some cases user supplied information can be inadvertently leaked from Strong Parameters. Specifically the return value of `each`, or `each_value`, or `each_pair` will return the underlying "untrusted" hash of data that was read from the parameters. Applications that use this return value may be inadvertently use untrusted user input. CVE-2020-8165 Potentially unintended unmarshalling of user-provided objects in MemCacheStore. There is potentially unexpected behaviour in the MemCacheStore where, when untrusted user input is written to the cache store using the `raw: true` parameter, re-reading the result from the cache can evaluate the user input as a Marshalled object instead of plain text. Unmarshalling of untrusted user input can have impact up to and including RCE. At a minimum, this vulnerability allows an attacker to inject untrusted Ruby objects into a web application. In addition to upgrading to the latest versions of Rails, developers should ensure that whenever they are calling `Rails.cache.fetch` they are using consistent values of the `raw` parameter for both reading and writing. For Debian 8 "Jessie", these problems have been fixed in version 2:4.1.8-1+deb8u7. We recommend that you upgrade your rails 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 - -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEQic8GuN/xDR88HkSj/HLbo2JBZ8FAl7s8VgACgkQj/HLbo2J BZ9+mwf/eTm6thb+c3shNLZxrJpoucZ9mwAeDvZ6fGpToePHb3aNlwqUI5MuUjp8 4s0FxpD1fLcDhhTGZTJkqeThQ/4qoutzvZjbsK9bGRLBo71Zkru2DolEvf71KNZC e0RDl/mfQHyhuDHePgnW8LV2MgG1/z+WKwabQ25mowV7lsoLIG8Z7F+wy7DkmeWN RybrUrCZGs+3J5KmhnAWM/U8oaQBgOQcYHdKGieCJ3KlUp7+LsDZEMEmbU4Cggog wGFovg3jsYTWDA3CNTW1ciK+Pw4x6XwWe+hyQzWZCt7j0ua1+o11GLVW1/cuHdpJ kci12HV5BINkmtAbCtHdilLjOrLT5Q== =f8HC - -----END PGP SIGNATURE----- - --------------------------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. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXvAvn+NLKJtyKPYoAQh6UQ//TxiNkPt7I84nRo5CIvP5AnpJSpyYAM7d 9Fjjn/rX5PyBH06Y2SyvAsfTotilBgVcJdAMIA/3ytykKx9c/zG8aseEwNQKpEXX 9Cg+X4ZTl60zYlp8pOoDGyVtrcKGhIovja5g+cLm5jWjZH1vQoo698OhFcLxPd8t 6NFypBemp+WaDCgOkaeMtuPScYCBg5fS1gEvQbxF0cerj2D2I81HTbT4xjdsqhmm Za6nZMwbIlkF1hHFRatvYgzir7ki5Kljsj6fUpz3+1yXIZ+UB/bMhRBDjximJ6dl R0GJTAR2ijId46p8UMy79g1oLJyJPJCtp33L93Y09m8ZhUH/plPf9yqwL5b2/Y4K eYll8I/Rk0wrFJekYaDf6Bu2vJxC/U4hq3pYFEGB1Sh+U6N+ZqdtPu3T3F5COybV efRhAn+KUK5YIQ53OgW/STRT5SYu3v2RqUA0bKXRKPKeJWn9olwLnjVqkjP0BTeW vb2uqXJkXRS0mh67QEfMfw2zq7D93SlMwD5UorvmIcxJc9prxhi5DqVXTo1sdz3F rTfuqda0JCwi49vSS6jKOsSkWEtRu4GrwVu3szdPiQvelLDQjhe2gz4Yefy488ey ZHp/+nJFOtVGnKLXsY+mqQn0zeljOqKVzQac0owFRaKCmMxqSLl0xh5k4miIYFa1 e5nIyMpRqww= =sZnW -----END PGP SIGNATURE-----