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ucsdlib / damspas

UC San Diego DAMS Hydra Head
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[Security] Bump rack from 1.6.11 to 1.6.12 #733

Closed dependabot-preview[bot] closed 4 years ago

dependabot-preview[bot] commented 4 years ago

Bumps rack from 1.6.11 to 1.6.12. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Low severity vulnerability that affects rack There's a possible information leak / session hijack vulnerability in Rack. Attackers may be able to find and hijack sessions by using timing attacks targeting the session id. Session ids are usually stored and indexed in a database that uses some kind of scheme for speeding up lookups of that session id. By carefully measuring the amount of time it takes to look up a session, an attacker may be able to find a valid session id and hijack the session.

The session id itself may be generated randomly, but the way the session is indexed by the backing store does not use a secure comparison.

Impact

The session id stored in a cookie is the same id that is used when querying the backing session storage engine. Most storage mechanisms (for example a database) use some sort of indexing in order to speed up the lookup of that id. By carefully timing requests and session lookup failures, an attacker may be able to perform a timing attack to determine an existing session id and hijack that session.

Releases

The 1.6.12 and 2.0.8 releases are available at the normal locations.

Workarounds

There are no known workarounds.

Patches

To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a

... (truncated)

Affected versions: < 1.6.12

Commits
  • de902e4 Merge branch '1-6-sec' into 1-6-stable
  • b7d6546 Bump version
  • d3e2f88 making diff smaller
  • 99a8a87 fix memcache tests on 1.6
  • f2cb48e fix tests on 1.6
  • 7ff635c Introduce a new base class to avoid breaking when upgrading
  • 3232f93 Add a version prefix to the private id to make easier to migrate old values
  • 15da2e5 Fallback to the public id when reading the session in the pool adapter
  • 1a532d1 Also drop the session with the public id when destroying sessions
  • 9fe40c6 Fallback to the legacy id when the new id is not found
  • Additional commits viewable in compare view


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dependabot-preview[bot] commented 4 years ago

Superseded by #742.