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GHSA-7cv3-gvmc-8mq5

Phusion Passenger SpawningKit Contains Arbitrary Read/Write Vulnerability

Source: GitHub Advisory Database (reviewed) Critical CVE-2018-12026

Packages

EcosystemPackageAffectedFixed in
RubyGems passenger >= 5.3.0, < 5.3.2 5.3.2

Details

As written in the advisory (Markdown source, shown as plain text).

During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows such applications to replace key files or directories in the spawning communication directory with symlinks. This then could result in arbitrary reads and writes, which in turn can result in information disclosure and privilege escalation.

References

External links from the advisory. They lead to third-party sites.