Sunday, August 24, 2025
All the Bits Fit to Print
Tracing a decade of Ruby Marshal deserialization vulnerabilities and patches
The article chronicles the long history of deserialization vulnerabilities in Ruby’s Marshal module, highlighting a persistent cycle of exploits and patches that underscores the need for fundamental changes in Ruby’s approach to serialization security.
Why it matters: Marshal deserialization vulnerabilities enable arbitrary code execution, affecting critical Ruby applications and libraries widely used in production.
The big picture: Despite decades of patches, the root cause remains unaddressed, suggesting the need to deprecate unsafe Marshal methods in favor of safer serialization alternatives.
The stakes: Continued reliance on Marshal keeps the Ruby ecosystem vulnerable to new exploit techniques, risking widespread security incidents.
Commenters say: Readers emphasize concerns about Marshal compatibility across systems and stress the urgency of adopting safer serialization formats to break the exploit cycle.