Vulnerability in jtescher image_optimizer

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)
• Critical severity: CVSS 9.8

[ Description ]Official description

The image_optimizer Ruby gem 1.3.0 through 1.9.0 contains an OS command injection vulnerability in ImageOptimizer#identify_format that allows attackers to execute commands by supplying a crafted image path when the identify option is enabled. Attackers controlling the path, such as an uploaded file name, can append shell metacharacters like ';' that are executed via Ruby backticks with the Ruby process privileges.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• gist.github.com/R3tro16/a99a058d24a06692721a6a3fade9649d
• github.com/jtescher/image_optimizer
• github.com/jtescher/image_optimizer/blob/v1.9.0/lib/image_optimizer.rb
• github.com/jtescher/image_optimizer/blob/v1.9.0/lib/image_optimizer/shell.rb
• www.vulncheck.com/advisories/image-optimizer-1.3.0-through-1.9.0-os-command-injection-v…