The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.

Affected: RubyGems: activerecord-session_store

The `activerecord-session_store` (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.

## Recommendation

This has been fixed in version 2.0.0. All users are advised to update to this version or later.

python-ecdsa: Unexpected and undocumented exceptions during signature decoding python-ecdsa: DER encoding is not being verified in signatures rubygem-activerecord-session_store: hijack sessions by using timing attacks targeting the session id rake: OS Command Injection via egrep in Rake::FileList guava: local information disclosure via temporary directory created with unsafe permissions PyYAML: incomplete fix for CVE-2020-1747 rubygem-nokogiri: XML external entity injection via Nokogiri::XML::Schema Satellite: Azure compute resource secret_key leak to authenticated users foreman: possible man-in-the-middle in smart_proxy realm_freeipa Satellite: BMC controller credential leak via API python-aiohttp: Open redirect in aiohttp.web_middlewares.normalize_path_middleware rubygem-actionpack: Possible Information Disclosure / Unintended Method Execution in Action Pack rails: Possible Denial of Service vulnerability in Action Dispatch rails: Possible DoS Vulnerability in Action Controller Token Authentication django: potential directory-traversal via uploaded files rubygem-puma: incomplete fix for CVE-2019-16770 allows Denial of Service (DoS) django: Potential directory-traversal via uploaded files rubygem-addressable: ReDoS in templates django: Potential directory traversal via ``admindocs`` python-urllib3: ReDoS in the parsing of authority part of URL django: Possible indeterminate SSRF, RFI, and LFI attacks since validators accepted leading zeros in IPv4 addresses

Affected: Ubuntu:16.04:LTS: ruby-activerecord-session-store, Ubuntu:18.04:LTS: ruby-activerecord-session-store

The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.